def clean_location(self):
p = fromstr(self.cleaned_data['location'])
line = LineString(p, self.competition.location.coordinates, srid=4326) # lon/lat (srid=4326)
line.transform(53031) # transform to two-point equidistant projection (srid=53031)
if line.length > self.competition.check_in_distance:
raise forms.ValidationError(_("""You are not close enough to
enter the competition, or you GPS might not be turned on. In the latter
case, turn on your device's GPS and reload the page."""))
return self.cleaned_data['location']
def check_consistency(self, cleaned_data):
if cleaned_data['city'].country != cleaned_data['country']:
return (False, "The location's city and country do not match.")
if cleaned_data['coordinates']:
line = LineString(cleaned_data['coordinates'], cleaned_data['city'].coordinates, srid=4326)
line.transform(53031) # transform to two-point equidistant project
# if coordinate is more than 500km away from city
if line.length > 500000:
return (False, "The location's coordinates are more than 500km away from its city.")
return (True, "")
def sensors(point_list):
route = LineString([[point['lng'], point['lat']] for point in point_list], srid=canonical_projection)
route.transform(google_projection)
sensor_map = []
for sensor_ind, sensor in enumerate(sensors_transformed):
if sensor['compare'].distance(route) < FUZZY_DIST:
sensor_map.append({
'loc':sensor['map'],
'true':true_sensor_value[sensor_ind],
'predicted':lsqr[sensor_ind]
})
return sensor_map
def sensors(point_list):
route = LineString([[point['lng'], point['lat']] for point in point_list],
srid=canonical_projection)
route.transform(google_projection)
sensor_map = []
for sensor_ind, sensor in enumerate(sensors_transformed):
if sensor['compare'].distance(route) < FUZZY_DIST:
sensor_map.append({
'loc': sensor['map'],
'true': true_sensor_value[sensor_ind],
'predicted': lsqr[sensor_ind]
})
return sensor_map
def trackpointlist_to_trackseg(trackfile, points):
if len(
points
) == 1: # Add single point twice, LineString can't have only 1 point
points.append(points[0])
trackseg = Trackseg(trackfile=trackfile, user=trackfile.user)
points_geo = [x.geometry for x in points]
if len(points_geo) == 0:
return 0
trackseg.geometry = LineString(points_geo)
trackseg.starttime = points[0].time
trackseg.endtime = points[-1].time
trackseg.trackpoint_cnt = len(points)
# Transform into projected coordinate system (using web mercator) to get length in meters
# TODO: make sure this is correct and accurate way to do it
trackseg_web_mercator = LineString(points_geo, srid=4326)
trackseg_web_mercator.transform(3857)
trackseg.length = trackseg_web_mercator.length
trackseg.save()
return trackseg
class Link:
def __init__(self, geom, speed):
self.line = LineString(geom['coordinates'], srid=4326)
self.line.transform(32611)
self.speed = speed
self.cur_dist = 0
self.total_dist = self.line.length
def move(self, dt):
distance = self.speed * dt
overshot = distance + self.cur_dist - self.total_dist
if overshot > 0:
self.cur_dist = self.total_dist
return float(overshot) / self.speed
else:
self.cur_dist += distance
return 0
def get_position(self):
pt = self.line.interpolate(self.cur_dist)
pt.transform(3857)
return list(pt)
def analyse_route(self, route_id):
route = self.routes[route_id]
shape = self.gtfs.shapes[route_id]
pnts = [(x[1], x[0]) for x in shape['points']]
line = LineString(pnts, srid=WGS84_SRID)
print line
line.transform(TARGET_SRID)
#for trip_id in route.keys():
print line.length
for trip_id in ('21032013201700', ):
print trip_id
pnts = [(s[1], s[0]) for s in route[trip_id]['points']]
sample_line = LineString(pnts, srid=WGS84_SRID)
sample_line.transform(TARGET_SRID)
sample_line = sample_line.simplify(4)
sample_line.transform(WGS84_SRID)
for s in route[trip_id]['points']:
pnt = Point(s[1], s[0], srid=WGS84_SRID)
pnt.transform(TARGET_SRID)
dist = line.project(pnt)
print "%s %f" % (s, dist)
print route.keys()
def render_static(request, height=None, width=None, format='png',
background='satellite', bounds=None, center=None, render_srid=3857):
# width and height
width = int(width)
height = int(height)
if width > settings.MAX_IMAGE_DIMENSION or \
height > settings.MAX_IMAGE_DIMENSION or \
width <= 1 or height <= 1:
logging.debug("Invalid size")
return HttpResponseBadRequest("Invalid image size, both dimensions must be in range %i-%i" % (1, settings.MAX_IMAGE_DIMENSION))
# image format
if format not in IMAGE_FORMATS:
logging.error("unknown image format %s" % format)
return HttpResponseBadRequest("Unknown image format, available formats: " + ", ".join(IMAGE_FORMATS))
if format.startswith('png'):
mimetype = 'image/png'
elif format.startswith('jpeg'):
mimetype = 'image/jpeg'
# bounds
bounds_box = None
if bounds:
bounds_components = bounds.split(',')
if len(bounds_components) != 4:
return HttpResponseBadRequest("Invalid bounds, must be 4 , separated numbers")
bounds_components = [float(f) for f in bounds_components]
if not (-180 < bounds_components[0] < 180) or not (-180 < bounds_components[2] < 180):
logging.error("x out of range %f or %f" % (bounds_components[0], bounds_components[2]))
return HttpResponseBadRequest("x out of range %f or %f" % (bounds_components[0], bounds_components[2]))
if not (-90 < bounds_components[1] < 90) or not (-90 < bounds_components[3] < 90):
logging.error("y out of range %f or %f" % (bounds_components[1], bounds_components[3]))
return HttpResponseBadRequest("y out of range %f or %f" % (bounds_components[1], bounds_components[3]))
ll = Point(bounds_components[0], bounds_components[1], srid=4326)
ll.transform(render_srid)
ur = Point(bounds_components[2], bounds_components[3], srid=4326)
ur.transform(render_srid)
bounds_box = mapnik.Box2d(ll.x, ll.y, ur.x, ur.y)
elif center:
center_components = center.split(',')
if len(center_components) != 3:
return HttpResponseBadRequest()
lon = float(center_components[0])
lat = float(center_components[1])
zoom = int(center_components[2])
# todo calc bounds from center and zoom
# baselayer
if background not in settings.BASE_LAYERS and background != 'none':
return HttpResponseNotFound("Background not found")
# GeoJSON post data
if request.method == "POST" and len(request.body):
input_data = json.loads(request.body)
else:
input_data = None
if not bounds and not center and not input_data:
return HttpResponseBadRequest("Bounds, center, or post data is required.")
# initialize map
m = mapnik.Map(width, height)
m.srs = '+init=epsg:' + str(render_srid)
# add a tile source as a background
if background != "none":
background_file = settings.BASE_LAYERS[background]
background_style = mapnik.Style()
background_rule = mapnik.Rule()
background_rule.symbols.append(mapnik.RasterSymbolizer())
background_style.rules.append(background_rule)
m.append_style('background style', background_style)
tile_layer = mapnik.Layer('background')
tile_layer.srs = '+init=epsg:' + str(render_srid)
tile_layer.datasource = mapnik.Gdal(base=settings.BASE_LAYER_DIR, file=background_file)
tile_layer.styles.append('background style')
m.layers.append(tile_layer)
# add features from geojson
if input_data and input_data['type'] == "Feature":
features = [input_data]
elif input_data and input_data['type'] == "FeatureCollection":
if 'features' not in input_data:
return HttpResponseBadRequest()
features = input_data['features']
else:
features = []
logging.debug("Adding %d features to map" % len(features))
geometries = []
point_features = []
fid = 0
for feature in features:
if 'geometry' not in feature:
logging.debug("feature does not have geometry")
return HttpResponseBadRequest("Feature does not have a geometry")
if 'type' not in feature['geometry']:
logging.debug("geometry does not have type")
return HttpResponseBadRequest("Geometry does not have a type")
fid += 1
style_name = str(fid)
if feature['geometry']['type'] == 'Point':
point_features.append(feature)
elif feature['geometry']['type'] in ('LineString', 'MultiLineString'):
if feature['geometry']['type'] == 'LineString':
geos_feature = LineString(feature['geometry']['coordinates'])
elif feature['geometry']['type'] == 'MultiLineString':
rings = feature['geometry']['coordinates']
rings = [[(c[0], c[1]) for c in r] for r in rings]
if len(rings) == 1:
geos_feature = LineString(rings[0])
else:
linestrings = []
for ring in rings:
try:
linestrings.append(LineString(ring))
except Exception, e:
logging.error("Error adding ring: %s", e)
geos_feature = MultiLineString(linestrings)
geos_feature.srid = 4326
geos_feature.transform(render_srid)
geometries.append(geos_feature)
style = mapnik.Style()
line_rule = mapnik.Rule()
style_dict = None
if 'style' in feature:
style_dict = feature['style']
elif 'properties' in feature:
style_dict = feature['properties']
line_rule.symbols.append(line_symbolizer(style_dict))
style.rules.append(line_rule)
m.append_style(style_name, style)
wkt = geos_feature.wkt
line_layer = mapnik.Layer(style_name + ' layer')
line_layer.datasource = mapnik.CSV(inline='wkt\n' + '"' + wkt + '"')
line_layer.styles.append(style_name)
line_layer.srs = '+init=epsg:' + str(render_srid)
m.layers.append(line_layer)
elif feature['geometry']['type'] == 'Polygon' or feature['geometry']['type'] == 'MultiPolygon':
geos_feature = GEOSGeometry(json.dumps(feature['geometry']))
geos_feature.srid = 4326
geos_feature.transform(render_srid)
geometries.append(geos_feature)
style = mapnik.Style()
rule = mapnik.Rule()
style_dict = None
if 'style' in feature:
style_dict = feature['style']
elif 'properties' in feature:
style_dict = feature['properties']
rule.symbols.append(polygon_symbolizer(style_dict))
rule.symbols.append(line_symbolizer(style_dict))
style.rules.append(rule)
m.append_style(style_name, style)
wkt = geos_feature.wkt
layer = mapnik.Layer(style_name + ' layer')
layer.datasource = mapnik.CSV(inline='wkt\n' + '"' + wkt + '"')
layer.styles.append(style_name)
layer.srs = '+init=epsg:' + str(render_srid)
m.layers.append(layer)
def line(self):
geom = LineString([(x, y) for x, y, _, _ in self.gcps])
geom.srid = self._srid
if self._srid != 4326:
geom.transform(4326)
return geom
class Path(AddPropertyMixin, MapEntityMixin, AltimetryMixin,
TimeStampedModelMixin, StructureRelated):
geom = models.LineStringField(srid=settings.SRID, spatial_index=False)
geom_cadastre = models.LineStringField(null=True, srid=settings.SRID, spatial_index=False,
editable=False)
valid = models.BooleanField(db_column='valide', default=True, verbose_name=_(u"Validity"),
help_text=_(u"Approved by manager"))
visible = models.BooleanField(db_column='visible', default=True, verbose_name=_(u"Visible"),
help_text=_(u"Shown in lists and maps"))
name = models.CharField(null=True, blank=True, max_length=20, db_column='nom', verbose_name=_(u"Name"),
help_text=_(u"Official name"))
comments = models.TextField(null=True, blank=True, db_column='remarques', verbose_name=_(u"Comments"),
help_text=_(u"Remarks"))
departure = models.CharField(null=True, blank=True, default="", max_length=250, db_column='depart', verbose_name=_(u"Departure"),
help_text=_(u"Departure place"))
arrival = models.CharField(null=True, blank=True, default="", max_length=250, db_column='arrivee', verbose_name=_(u"Arrival"),
help_text=_(u"Arrival place"))
comfort = models.ForeignKey('Comfort',
null=True, blank=True, related_name='paths',
verbose_name=_("Comfort"), db_column='confort')
source = models.ForeignKey('PathSource',
null=True, blank=True, related_name='paths',
verbose_name=_("Source"), db_column='source')
stake = models.ForeignKey('Stake',
null=True, blank=True, related_name='paths',
verbose_name=_("Maintenance stake"), db_column='enjeu')
usages = models.ManyToManyField('Usage',
blank=True, related_name="paths",
verbose_name=_(u"Usages"), db_table="l_r_troncon_usage")
networks = models.ManyToManyField('Network',
blank=True, related_name="paths",
verbose_name=_(u"Networks"), db_table="l_r_troncon_reseau")
eid = models.CharField(verbose_name=_(u"External id"), max_length=1024, blank=True, null=True, db_column='id_externe')
draft = models.BooleanField(db_column='brouillon', default=False, verbose_name=_(u"Draft"), db_index=True)
objects = PathManager()
include_invisible = PathInvisibleManager()
is_reversed = False
@property
def length_2d(self):
if self.geom:
return self.geom.length
else:
return None
@classproperty
def length_2d_verbose_name(cls):
return _(u"2D Length")
@property
def length_2d_display(self):
return round(self.length_2d, 1)
def kml(self):
""" Exports path into KML format, add geometry as linestring """
kml = simplekml.Kml()
geom3d = self.geom_3d.transform(4326, clone=True) # KML uses WGS84
line = kml.newlinestring(name=self.name,
description=plain_text(self.comments),
coords=geom3d.coords)
line.style.linestyle.color = simplekml.Color.red # Red
line.style.linestyle.width = 4 # pixels
return kml.kml()
def __unicode__(self):
return self.name or _('path %d') % self.pk
class Meta:
db_table = 'l_t_troncon'
verbose_name = _(u"Path")
verbose_name_plural = _(u"Paths")
permissions = MapEntityMixin._meta.permissions + [("add_draft_path", "Can add draft Path"),
("change_draft_path", "Can change draft Path"),
("delete_draft_path", "Can delete draft Path"),
]
@classmethod
def closest(cls, point, exclude=None):
"""
Returns the closest path of the point.
Will fail if no path in database.
"""
# TODO: move to custom manager
if point.srid != settings.SRID:
point = point.transform(settings.SRID, clone=True)
qs = cls.objects.exclude(draft=True)
if exclude:
qs = qs.exclude(pk=exclude.pk)
return qs.exclude(visible=False).distance(point).order_by('distance')[0]
def is_overlap(self):
return not PathHelper.disjoint(self.geom, self.pk)
def reverse(self):
"""
Reverse the geometry.
We keep track of this, since we will have to work on topologies at save()
"""
reversed_coord = self.geom.coords[-1::-1]
self.geom = LineString(reversed_coord)
self.is_reversed = True
return self
def interpolate(self, point):
"""
Returns position ([0.0-1.0]) and offset (distance) of the point
along this path.
"""
return PathHelper.interpolate(self, point)
def snap(self, point):
"""
Returns the point snapped (i.e closest) to the path line geometry.
"""
return PathHelper.snap(self, point)
def reload(self):
# Update object's computed values (reload from database)
if self.pk and self.visible:
fromdb = self.__class__.objects.get(pk=self.pk)
self.geom = fromdb.geom
AltimetryMixin.reload(self, fromdb)
TimeStampedModelMixin.reload(self, fromdb)
return self
@debug_pg_notices
def save(self, *args, **kwargs):
# If the path was reversed, we have to invert related topologies
if self.is_reversed:
for aggr in self.aggregations.all():
aggr.start_position = 1 - aggr.start_position
aggr.end_position = 1 - aggr.end_position
aggr.save()
self._is_reversed = False
super(Path, self).save(*args, **kwargs)
self.reload()
def delete(self, *args, **kwargs):
topologies = list(self.topology_set.filter())
r = super(Path, self).delete(*args, **kwargs)
if not Path.objects.exists():
return r
for topology in topologies:
if isinstance(topology.geom, Point):
closest = self.closest(topology.geom, self)
position, offset = closest.interpolate(topology.geom)
new_topology = Topology.objects.create()
aggrobj = PathAggregation(topo_object=new_topology,
start_position=position,
end_position=position,
path=closest)
aggrobj.save()
point = Point(topology.geom.x, topology.geom.y, srid=settings.SRID)
new_topology.geom = point
new_topology.offset = offset
new_topology.position = position
new_topology.save()
topology.mutate(new_topology)
return r
@property
def name_display(self):
return u'<a data-pk="%s" href="%s" title="%s" >%s</a>' % (self.pk,
self.get_detail_url(),
self,
self)
@property
def name_csv_display(self):
return unicode(self)
@classproperty
def trails_verbose_name(cls):
return _("Trails")
@property
def trails_display(self):
trails = getattr(self, '_trails', self.trails)
if trails:
return ", ".join([t.name_display for t in trails])
return _("None")
@property
def trails_csv_display(self):
trails = getattr(self, '_trails', self.trails)
if trails:
return ", ".join([unicode(t) for t in trails])
return _("None")
@property
def usages_display(self):
return u", ".join([unicode(u) for u in self.usages.all()])
@property
def networks_display(self):
return u", ".join([unicode(n) for n in self.networks.all()])
@classmethod
def get_create_label(cls):
return _(u"Add a new path")
@property
def checkbox(self):
return u'<input type="checkbox" name="{}[]" value="{}" />'.format('path',
self.pk)
@classproperty
def checkbox_verbose_name(cls):
return _("Action")
@property
def checkbox_display(self):
return self.checkbox
def topologies_by_path(self, default_dict):
if 'geotrek.core' in settings.INSTALLED_APPS:
for trail in self.trails:
default_dict[_('Trails')].append({'name': trail.name, 'url': trail.get_detail_url()})
if 'geotrek.trekking' in settings.INSTALLED_APPS:
for trek in self.treks:
default_dict[_('Treks')].append({'name': trek.name, 'url': trek.get_detail_url()})
for service in self.services:
default_dict[_('Services')].append(
{'name': service.type.name, 'url': service.get_detail_url()})
for poi in self.pois:
default_dict[_('Pois')].append({'name': poi.name, 'url': poi.get_detail_url()})
if 'geotrek.signage' in settings.INSTALLED_APPS:
for signage in self.signages:
default_dict[_('Signages')].append({'name': signage.name, 'url': signage.get_detail_url()})
if 'geotrek.infrastructure' in settings.INSTALLED_APPS:
for infrastructure in self.infrastructures:
default_dict[_('Infrastructures')].append(
{'name': infrastructure.name, 'url': infrastructure.get_detail_url()})
if 'geotrek.maintenance' in settings.INSTALLED_APPS:
for intervention in self.interventions:
default_dict[_('Interventions')].append(
{'name': intervention.name, 'url': intervention.get_detail_url()})
def merge_path(self, path_to_merge):
"""
Path unification
:param path_to path_to_merge: Path instance to merge
:return: Boolean
"""
if (self.pk and path_to_merge) and (self.pk != path_to_merge.pk):
conn = connections[DEFAULT_DB_ALIAS]
cursor = conn.cursor()
sql = "SELECT ft_merge_path({}, {});".format(self.pk, path_to_merge.pk)
cursor.execute(sql)
result = cursor.fetchall()[0][0]
if result:
# reload object after unification
self.reload()
return result
@property
def extent(self):
return self.geom.transform(settings.API_SRID, clone=True).extent if self.geom else None
def save_into_database(rib_path, rmb_path, putdict, sewerdict, rmberrors):
# Get sewerage name, try to create sewerage
# If it exists, return with an error
sewerage_name = os.path.basename(rmb_path)[:-4] # Minus ".RMB"
if models.Sewerage.objects.filter(name=sewerage_name).exists():
rmberrors.append(Error(
line_number=0,
message=("Er bestaat al een stelsel met de naam {name}. "
"Verwijder het op de archiefpagina, of gebruik "
"een andere naam.").format(name=sewerage_name)))
return
# Files are copied only at the end
sewerage = models.Sewerage.objects.create(
name=sewerage_name,
rib=None, # Filled in later
rmb=None,
active=True)
# Save the puts, keep a dictionary
saved_puts = dict()
for put_id, putinfo in putdict.items():
saved_puts[put_id] = models.Manhole.objects.create(
sewerage=sewerage,
code=put_id,
sink=int(putinfo['is_sink']),
ground_level=putinfo['surface_level'],
the_geom=Point(*putinfo['coordinate']))
# Save the sewers, use the dictionary
saved_sewers = dict()
for sewer_id, sewerinfo in sewerdict.items():
manhole1 = saved_puts[sewerinfo['manhole_code_1']]
manhole2 = saved_puts[sewerinfo['manhole_code_2']]
sewer_line_rd = LineString(manhole1.the_geom, manhole2.the_geom)
sewer_line_rd.set_srid(4326)
sewer_line_rd.transform(RD)
saved_sewers[sewer_id] = models.Sewer.objects.create(
sewerage=sewerage,
code=sewer_id,
quality=models.Sewer.QUALITY_UNKNOWN,
diameter=sewerinfo['diameter'],
manhole1=manhole1,
manhole2=manhole2,
bob1=sewerinfo['bob_1'],
bob2=sewerinfo['bob_2'],
the_geom=LineString(manhole1.the_geom, manhole2.the_geom),
the_geom_length=sewer_line_rd.length)
# Save the measurements
sewer_measurements_dict = dict()
for sewer_id, sewerinfo in sewerdict.items():
measurements = sewerinfo['measurements']
sewer = saved_sewers[sewer_id]
if measurements:
sewer_measurements = [
# Create the SewerMeasurement objects, but don't save
# them yet!
models.SewerMeasurement(
sewer=sewer,
dist=m['dist'],
virtual=False,
water_level=None,
flooded_pct=None,
bob=m['bob'],
obb=m['bob'] + sewerinfo['diameter'],
the_geom=Point(*m['coordinate']))
for m in measurements]
# Quality
sewer.judge_quality(sewer_measurements)
sewer.save()
# BOB correction ("sawtooth" phenomenon)
correct_bob_values(sewer, sewer_measurements)
# Create two virtual sewer measurements for the start and
# end of the sewer
virtual_start = models.SewerMeasurement(
sewer=sewer, dist=0, virtual=True, water_level=None,
flooded_pct=None, bob=sewer.bob1,
obb=sewer.bob1 + sewerinfo['diameter'],
the_geom=sewer.manhole1.the_geom)
virtual_end = models.SewerMeasurement(
sewer=sewer, dist=sewer.the_geom_length,
virtual=True, water_level=None,
flooded_pct=None, bob=sewer.bob2,
obb=sewer.bob2 + sewerinfo['diameter'],
the_geom=sewer.manhole2.the_geom)
# Note: we MUST add those two virtual points only after
# doing the sawtooth correction, otherwise the sawtooth
# correction will think that everything is fine already
# since the first and end points would be equal to the
# bobs of the sewer...
sewer_measurements = (
[virtual_start] + sewer_measurements + [virtual_end])
sewer_measurements_dict[sewer_id] = sewer_measurements
else:
# Create "virtual measurements"
sewer_measurements_dict[sewer_id] = list(
virtual_measurements(sewer))
sewer.quality = models.Sewer.QUALITY_UNKNOWN
sewer.save()
# Actually compute the lost capacity, the point of this app
lost_capacity.compute_lost_capacity(
saved_puts, saved_sewers, sewer_measurements_dict)
# Save all the SewerMeasurement objects to the database. Since
# there are thousands of them, it is essential to use bulk_create.
models.SewerMeasurement.objects.bulk_create(list(chain(
*sewer_measurements_dict.values())))
# Success -- copy files
sewerage.move_files(rib_path, rmb_path)
# The clap on the fireworks
sewerage.generate_rib()
def find_shared_segments(R, S):
"""Return a list of LineStrings where two routes overlap
Keyword arguments:
route_a -- LineString route
route_b -- LineString route
This method should be commutative.
Algorithmic idea:
For a given set of routes that are not identical:
- Go through each route (R and S), and make a list, P(*) for each that contains points not on the other
route.
- Starting with P(R), iterate through elements p_i = P(R)_i:
- Find p_i in original polyline, R.
- Find the vertex of the item before p_i in R, v_s. v_s should be on the other route S.
- Starting from this element in R, move forward through route until you find the first vertex
that is on S, call this v_f. Remove elements not on S from P(R), including p_i
- Starting from v_s, find closest vertex on S, call it g. This could be before or after where v_s
intersects the route.
- Move along S in both directions from g, taking ordered pairs where order is index in S, and identify
the first pair where the first element is on R, but the second element is not.
- If the first element of this tuple is after g, then that element is end of a shared leg.
- Otherwise, v_s is the end of that shared leg.
- Starting from v_f, find closest vertex on S, call it g, this could be before or after where v_f
intersects the route.
- Move along S in both directions from g, taking ordered pairs where order is index in S, and identify
the first pair where the first element is not on R, but the second element is.
- If the second element of this tuple is before g, then that element is the start of a shared leg.
- Otherwise, v_f is the start of that shared leg.
- At this point, we have a list of starting points and ending points of shared legs, combining them
in to a polyline from the two routes seems tractable. TODO: figure this out when brain is less fried.
"""
R_points_not_on_S = []
S_points_not_on_R = []
S_trans = S.clone()
S_trans.set_srid(4326)
S_trans.transform(900913)
for pt in R:
place = Point(pt)
place.set_srid(4326)
place.transform(900913)
if place.distance(S_trans) > FUZZY_DIST:
R_points_not_on_S.append(pt)
#TODO: refactor these into single function call
S_trans = S.clone()
S_trans.set_srid(4326)
S_trans.transform(900913)
R_trans = R.clone()
R_trans.set_srid(4326)
R_trans.transform(900913)
for pt in S:
place = Point(pt, srid=4326)
place.transform(900913)
if place.distance(R_trans) > FUZZY_DIST:
S_points_not_on_R.append(pt)
# we know they start at the same point
shared_leg_list = []
shared_leg = []
shared_leg_start_index = 0
n = len(R_points_not_on_S)
while n > 0:
p_i = R_points_not_on_S[0]
j = R.index(p_i)
v_s = R[j - 1]
f = j
v_f = p_i
while v_f in R_points_not_on_S:
idx = R_points_not_on_S.index(v_f)
del R_points_not_on_S[idx]
n = n - 1
f = f + 1
v_f = R[f]
# We know v_f is fuzzy-on S, so we can iterate through pairs of S and find the segment it is fuzzy-on
before_index = 0
for i, start_vertex in enumerate(S):
if i == len(S):
break
end_vertex = S[i + 1]
line = LineString([start_vertex, end_vertex])
line.set_srid(4326)
line.transform(900913)
pt = Point(v_s)
pt.set_srid(4326)
pt.transform(900913)
if pt.distance(line) < FUZZY_DIST:
before_index = i
break
# At this point, we know shared_leg_start_index..before_index is certainly on the path.
shared_leg = S[shared_leg_start_index:(before_index+1)]
shared_leg.append(v_s)
after_index = before_index + 1
# Either v_s is the end of the previous shared segment, or after_index or something following that,
# so go until you find a point on S not on R, starting at after_index
pt = Point(S[after_index], srid=4326)
pt.transform(900913)
while pt.distance(R_trans) < FUZZY_DIST:
shared_leg.append(S[after_index])
after_index = after_index + 1
# should check that shared_leg is not just first element. In fact, TODO: go back an check what happens
# if the first element is the only shared element.
shared_leg_list.append(LineString(shared_leg))
return shared_leg_list
shared_leg = []
def filter(self, queryset, containment="overlaps"):
if not len(self):
return queryset
qs = queryset
bbox = [None, None, None, None]
srid = self.srid
if srid is None:
srid = 4326
max_extent = crss.crs_bounds(srid)
tolerance = crss.crs_tolerance(srid)
for subset in self:
if isinstance(subset, Slice):
is_slice = True
value = subset.value
elif isinstance(subset, Trim):
is_slice = False
low = subset.low
high = subset.high
if subset.is_temporal:
if is_slice:
qs = qs.filter(
begin_time__lte=value,
end_time__gte=value
)
else:
if high is not None:
qs = qs.filter(
begin_time__lte=high
)
if low is not None:
qs = qs.filter(
end_time__gte=low
)
# check if the temporal bounds must be strictly contained
if containment == "contains":
if high is not None:
qs = qs.filter(
end_time__lte=high
)
if low is not None:
qs = qs.filter(
begin_time__gte=low
)
else:
if is_slice:
if subset.is_x:
line = LineString(
(value, max_extent[1]),
(value, max_extent[3])
)
else:
line = LineString(
(max_extent[0], value),
(max_extent[2], value)
)
line.srid = srid
if srid != 4326:
line.transform(4326)
qs = qs.filter(footprint__intersects=line)
else:
if subset.is_x:
bbox[0] = subset.low
bbox[2] = subset.high
else:
bbox[1] = subset.low
bbox[3] = subset.high
if bbox != [None, None, None, None]:
bbox = map(
lambda v: v[0] if v[0] is not None else v[1],
zip(bbox, max_extent)
)
bbox[0] -= tolerance; bbox[1] -= tolerance
bbox[2] += tolerance; bbox[3] += tolerance
logger.debug(
"Applying BBox %s with containment '%s'." % (bbox, containment)
)
poly = Polygon.from_bbox(bbox)
poly.srid = srid
if srid != 4326:
poly.transform(4326)
if containment == "overlaps":
qs = qs.filter(footprint__intersects=poly)
elif containment == "contains":
qs = qs.filter(footprint__within=poly)
return qs
class Path(AddPropertyMixin, MapEntityMixin, AltimetryMixin,
TimeStampedModelMixin, StructureRelated):
geom = models.LineStringField(srid=settings.SRID, spatial_index=False)
geom_cadastre = models.LineStringField(null=True,
srid=settings.SRID,
spatial_index=False,
editable=False)
valid = models.BooleanField(db_column='valide',
default=True,
verbose_name=_("Validity"),
help_text=_("Approved by manager"))
visible = models.BooleanField(db_column='visible',
default=True,
verbose_name=_("Visible"),
help_text=_("Shown in lists and maps"))
name = models.CharField(null=True,
blank=True,
max_length=250,
db_column='nom',
verbose_name=_("Name"),
help_text=_("Official name"))
comments = models.TextField(null=True,
blank=True,
db_column='remarques',
verbose_name=_("Comments"),
help_text=_("Remarks"))
departure = models.CharField(null=True,
blank=True,
default="",
max_length=250,
db_column='depart',
verbose_name=_("Departure"),
help_text=_("Departure place"))
arrival = models.CharField(null=True,
blank=True,
default="",
max_length=250,
db_column='arrivee',
verbose_name=_("Arrival"),
help_text=_("Arrival place"))
comfort = models.ForeignKey('Comfort',
null=True,
blank=True,
related_name='paths',
verbose_name=_("Comfort"),
db_column='confort')
source = models.ForeignKey('PathSource',
null=True,
blank=True,
related_name='paths',
verbose_name=_("Source"),
db_column='source')
stake = models.ForeignKey('Stake',
null=True,
blank=True,
related_name='paths',
verbose_name=_("Maintenance stake"),
db_column='enjeu')
usages = models.ManyToManyField('Usage',
blank=True,
related_name="paths",
verbose_name=_("Usages"),
db_table="l_r_troncon_usage")
networks = models.ManyToManyField('Network',
blank=True,
related_name="paths",
verbose_name=_("Networks"),
db_table="l_r_troncon_reseau")
eid = models.CharField(verbose_name=_("External id"),
max_length=1024,
blank=True,
null=True,
db_column='id_externe')
draft = models.BooleanField(db_column='brouillon',
default=False,
verbose_name=_("Draft"),
db_index=True)
objects = PathManager()
include_invisible = PathInvisibleManager()
is_reversed = False
@property
def length_2d(self):
if self.geom:
return self.geom.length
else:
return None
@classproperty
def length_2d_verbose_name(cls):
return _("2D Length")
@property
def length_2d_display(self):
return round(self.length_2d, 1)
def kml(self):
""" Exports path into KML format, add geometry as linestring """
kml = simplekml.Kml()
geom3d = self.geom_3d.transform(4326, clone=True) # KML uses WGS84
line = kml.newlinestring(name=self.name,
description=plain_text(self.comments),
coords=simplify_coords(geom3d.coords))
line.style.linestyle.color = simplekml.Color.red # Red
line.style.linestyle.width = 4 # pixels
return kml.kml()
def __str__(self):
return self.name or _('path %d') % self.pk
class Meta:
db_table = 'l_t_troncon'
verbose_name = _("Path")
verbose_name_plural = _("Paths")
permissions = MapEntityMixin._meta.permissions + [
("add_draft_path", "Can add draft Path"),
("change_draft_path", "Can change draft Path"),
("delete_draft_path", "Can delete draft Path"),
]
@classmethod
def closest(cls, point, exclude=None):
"""
Returns the closest path of the point.
Will fail if no path in database.
"""
# TODO: move to custom manager
if point.srid != settings.SRID:
point = point.transform(settings.SRID, clone=True)
qs = cls.objects.exclude(draft=True)
if exclude:
qs = qs.exclude(pk=exclude.pk)
return qs.exclude(
visible=False).distance(point).order_by('distance')[0]
def is_overlap(self):
return not PathHelper.disjoint(self.geom, self.pk)
def reverse(self):
"""
Reverse the geometry.
We keep track of this, since we will have to work on topologies at save()
"""
reversed_coord = self.geom.coords[-1::-1]
self.geom = LineString(reversed_coord)
self.is_reversed = True
return self
def interpolate(self, point):
"""
Returns position ([0.0-1.0]) and offset (distance) of the point
along this path.
"""
return PathHelper.interpolate(self, point)
def snap(self, point):
"""
Returns the point snapped (i.e closest) to the path line geometry.
"""
return PathHelper.snap(self, point)
def reload(self):
# Update object's computed values (reload from database)
if self.pk and self.visible:
fromdb = self.__class__.objects.get(pk=self.pk)
self.geom = fromdb.geom
AltimetryMixin.reload(self, fromdb)
TimeStampedModelMixin.reload(self, fromdb)
return self
@debug_pg_notices
def save(self, *args, **kwargs):
# If the path was reversed, we have to invert related topologies
if self.is_reversed:
for aggr in self.aggregations.all():
aggr.start_position = 1 - aggr.start_position
aggr.end_position = 1 - aggr.end_position
aggr.save()
self._is_reversed = False
super(Path, self).save(*args, **kwargs)
self.reload()
def delete(self, *args, **kwargs):
if not settings.TREKKING_TOPOLOGY_ENABLED:
return super(Path, self).delete(*args, **kwargs)
topologies = list(self.topology_set.filter())
r = super(Path, self).delete(*args, **kwargs)
if not Path.objects.exists():
return r
for topology in topologies:
if isinstance(topology.geom, Point):
closest = self.closest(topology.geom, self)
position, offset = closest.interpolate(topology.geom)
new_topology = Topology.objects.create()
aggrobj = PathAggregation(topo_object=new_topology,
start_position=position,
end_position=position,
path=closest)
aggrobj.save()
point = Point(topology.geom.x,
topology.geom.y,
srid=settings.SRID)
new_topology.geom = point
new_topology.offset = offset
new_topology.position = position
new_topology.save()
topology.mutate(new_topology)
return r
@property
def name_display(self):
return '<a data-pk="%s" href="%s" title="%s" >%s</a>' % (
self.pk, self.get_detail_url(), self, self)
@property
def name_csv_display(self):
return str(self)
@classproperty
def trails_verbose_name(cls):
return _("Trails")
@property
def trails_display(self):
trails = getattr(self, '_trails', self.trails)
if trails:
return ", ".join([t.name_display for t in trails])
return _("None")
@property
def trails_csv_display(self):
trails = getattr(self, '_trails', self.trails)
if trails:
return ", ".join([str(t) for t in trails])
return _("None")
@property
def usages_display(self):
return ", ".join([str(u) for u in self.usages.all()])
@property
def networks_display(self):
return ", ".join([str(n) for n in self.networks.all()])
@classmethod
def get_create_label(cls):
return _("Add a new path")
@property
def checkbox(self):
return '<input type="checkbox" name="{}[]" value="{}" />'.format(
'path', self.pk)
@classproperty
def checkbox_verbose_name(cls):
return _("Action")
@property
def checkbox_display(self):
return self.checkbox
def topologies_by_path(self, default_dict):
if 'geotrek.core' in settings.INSTALLED_APPS:
for trail in self.trails:
default_dict[_('Trails')].append({
'name': trail.name,
'url': trail.get_detail_url()
})
if 'geotrek.trekking' in settings.INSTALLED_APPS:
for trek in self.treks:
default_dict[_('Treks')].append({
'name': trek.name,
'url': trek.get_detail_url()
})
for service in self.services:
default_dict[_('Services')].append({
'name':
service.type.name,
'url':
service.get_detail_url()
})
for poi in self.pois:
default_dict[_('Pois')].append({
'name': poi.name,
'url': poi.get_detail_url()
})
if 'geotrek.signage' in settings.INSTALLED_APPS:
for signage in self.signages:
default_dict[_('Signages')].append({
'name':
signage.name,
'url':
signage.get_detail_url()
})
if 'geotrek.infrastructure' in settings.INSTALLED_APPS:
for infrastructure in self.infrastructures:
default_dict[_('Infrastructures')].append({
'name':
infrastructure.name,
'url':
infrastructure.get_detail_url()
})
if 'geotrek.maintenance' in settings.INSTALLED_APPS:
for intervention in self.interventions:
default_dict[_('Interventions')].append({
'name':
intervention.name,
'url':
intervention.get_detail_url()
})
def merge_path(self, path_to_merge):
"""
Path unification
:param path_to path_to_merge: Path instance to merge
:return: Boolean
"""
if (self.pk and path_to_merge) and (self.pk != path_to_merge.pk):
conn = connections[DEFAULT_DB_ALIAS]
cursor = conn.cursor()
sql = "SELECT ft_merge_path({}, {});".format(
self.pk, path_to_merge.pk)
cursor.execute(sql)
result = cursor.fetchall()[0][0]
if result:
# reload object after unification
self.reload()
return result
@property
def extent(self):
return self.geom.transform(settings.API_SRID,
clone=True).extent if self.geom else None
def find_shared_segments(R, S):
"""Return a list of LineStrings where two routes overlap
Keyword arguments:
route_a -- LineString route
route_b -- LineString route
This method should be commutative.
Algorithmic idea:
For a given set of routes that are not identical:
- Go through each route (R and S), and make a list, P(*) for each that contains points not on the other
route.
- Starting with P(R), iterate through elements p_i = P(R)_i:
- Find p_i in original polyline, R.
- Find the vertex of the item before p_i in R, v_s. v_s should be on the other route S.
- Starting from this element in R, move forward through route until you find the first vertex
that is on S, call this v_f. Remove elements not on S from P(R), including p_i
- Starting from v_s, find closest vertex on S, call it g. This could be before or after where v_s
intersects the route.
- Move along S in both directions from g, taking ordered pairs where order is index in S, and identify
the first pair where the first element is on R, but the second element is not.
- If the first element of this tuple is after g, then that element is end of a shared leg.
- Otherwise, v_s is the end of that shared leg.
- Starting from v_f, find closest vertex on S, call it g, this could be before or after where v_f
intersects the route.
- Move along S in both directions from g, taking ordered pairs where order is index in S, and identify
the first pair where the first element is not on R, but the second element is.
- If the second element of this tuple is before g, then that element is the start of a shared leg.
- Otherwise, v_f is the start of that shared leg.
- At this point, we have a list of starting points and ending points of shared legs, combining them
in to a polyline from the two routes seems tractable. TODO: figure this out when brain is less fried.
"""
R_points_not_on_S = []
S_points_not_on_R = []
S_trans = S.clone()
S_trans.set_srid(4326)
S_trans.transform(900913)
for pt in R:
place = Point(pt)
place.set_srid(4326)
place.transform(900913)
if place.distance(S_trans) > FUZZY_DIST:
R_points_not_on_S.append(pt)
#TODO: refactor these into single function call
S_trans = S.clone()
S_trans.set_srid(4326)
S_trans.transform(900913)
R_trans = R.clone()
R_trans.set_srid(4326)
R_trans.transform(900913)
for pt in S:
place = Point(pt, srid=4326)
place.transform(900913)
if place.distance(R_trans) > FUZZY_DIST:
S_points_not_on_R.append(pt)
# we know they start at the same point
shared_leg_list = []
shared_leg = []
shared_leg_start_index = 0
n = len(R_points_not_on_S)
while n > 0:
p_i = R_points_not_on_S[0]
j = R.index(p_i)
v_s = R[j - 1]
f = j
v_f = p_i
while v_f in R_points_not_on_S:
idx = R_points_not_on_S.index(v_f)
del R_points_not_on_S[idx]
n = n - 1
f = f + 1
v_f = R[f]
# We know v_f is fuzzy-on S, so we can iterate through pairs of S and find the segment it is fuzzy-on
before_index = 0
for i, start_vertex in enumerate(S):
if i == len(S):
break
end_vertex = S[i + 1]
line = LineString([start_vertex, end_vertex])
line.set_srid(4326)
line.transform(900913)
pt = Point(v_s)
pt.set_srid(4326)
pt.transform(900913)
if pt.distance(line) < FUZZY_DIST:
before_index = i
break
# At this point, we know shared_leg_start_index..before_index is certainly on the path.
shared_leg = S[shared_leg_start_index:(before_index + 1)]
shared_leg.append(v_s)
after_index = before_index + 1
# Either v_s is the end of the previous shared segment, or after_index or something following that,
# so go until you find a point on S not on R, starting at after_index
pt = Point(S[after_index], srid=4326)
pt.transform(900913)
while pt.distance(R_trans) < FUZZY_DIST:
shared_leg.append(S[after_index])
after_index = after_index + 1
# should check that shared_leg is not just first element. In fact, TODO: go back an check what happens
# if the first element is the only shared element.
shared_leg_list.append(LineString(shared_leg))
return shared_leg_list
shared_leg = []
class Path(AddPropertyMixin, MapEntityMixin, AltimetryMixin,
TimeStampedModelMixin, StructureRelated):
geom = models.LineStringField(srid=settings.SRID, spatial_index=False)
geom_cadastre = models.LineStringField(null=True, srid=settings.SRID, spatial_index=False,
editable=False)
valid = models.BooleanField(db_column='valide', default=True, verbose_name=_(u"Validity"),
help_text=_(u"Approved by manager"))
visible = models.BooleanField(db_column='visible', default=True, verbose_name=_(u"Visible"),
help_text=_(u"Shown in lists and maps"))
name = models.CharField(null=True, blank=True, max_length=20, db_column='nom', verbose_name=_(u"Name"),
help_text=_(u"Official name"))
comments = models.TextField(null=True, blank=True, db_column='remarques', verbose_name=_(u"Comments"),
help_text=_(u"Remarks"))
departure = models.CharField(null=True, blank=True, default="", max_length=250, db_column='depart', verbose_name=_(u"Departure"),
help_text=_(u"Departure place"))
arrival = models.CharField(null=True, blank=True, default="", max_length=250, db_column='arrivee', verbose_name=_(u"Arrival"),
help_text=_(u"Arrival place"))
comfort = models.ForeignKey('Comfort',
null=True, blank=True, related_name='paths',
verbose_name=_("Comfort"), db_column='confort')
source = models.ForeignKey('PathSource',
null=True, blank=True, related_name='paths',
verbose_name=_("Source"), db_column='source')
stake = models.ForeignKey('Stake',
null=True, blank=True, related_name='paths',
verbose_name=_("Maintenance stake"), db_column='enjeu')
usages = models.ManyToManyField('Usage',
blank=True, related_name="paths",
verbose_name=_(u"Usages"), db_table="l_r_troncon_usage")
networks = models.ManyToManyField('Network',
blank=True, related_name="paths",
verbose_name=_(u"Networks"), db_table="l_r_troncon_reseau")
eid = models.CharField(verbose_name=_(u"External id"), max_length=128, blank=True, null=True, db_column='id_externe')
objects = PathManager()
include_invisible = PathInvisibleManager()
is_reversed = False
@property
def length_2d(self):
if self.geom:
return self.geom.length
else:
return None
@classproperty
def length_2d_verbose_name(cls):
return _(u"2D Length")
@property
def length_2d_display(self):
return round(self.length_2d, 1)
def __unicode__(self):
return self.name or _('path %d') % self.pk
class Meta:
db_table = 'l_t_troncon'
verbose_name = _(u"Path")
verbose_name_plural = _(u"Paths")
@classmethod
def closest(cls, point):
"""
Returns the closest path of the point.
Will fail if no path in database.
"""
# TODO: move to custom manager
if point.srid != settings.SRID:
point = point.transform(settings.SRID, clone=True)
return cls.objects.all().exclude(visible=False).distance(point).order_by('distance')[0]
def is_overlap(self):
return not PathHelper.disjoint(self.geom, self.pk)
def reverse(self):
"""
Reverse the geometry.
We keep track of this, since we will have to work on topologies at save()
"""
reversed_coord = self.geom.coords[-1::-1]
self.geom = LineString(reversed_coord)
self.is_reversed = True
return self
def interpolate(self, point):
"""
Returns position ([0.0-1.0]) and offset (distance) of the point
along this path.
"""
return PathHelper.interpolate(self, point)
def snap(self, point):
"""
Returns the point snapped (i.e closest) to the path line geometry.
"""
return PathHelper.snap(self, point)
def reload(self, fromdb=None):
# Update object's computed values (reload from database)
if self.pk and self.visible:
fromdb = self.__class__.objects.get(pk=self.pk)
self.geom = fromdb.geom
AltimetryMixin.reload(self, fromdb)
TimeStampedModelMixin.reload(self, fromdb)
return self
@debug_pg_notices
def save(self, *args, **kwargs):
# If the path was reversed, we have to invert related topologies
if self.is_reversed:
for aggr in self.aggregations.all():
aggr.start_position = 1 - aggr.start_position
aggr.end_position = 1 - aggr.end_position
aggr.save()
self._is_reversed = False
super(Path, self).save(*args, **kwargs)
self.reload()
@property
def name_display(self):
return u'<a data-pk="%s" href="%s" title="%s" >%s</a>' % (self.pk,
self.get_detail_url(),
self,
self)
@property
def name_csv_display(self):
return unicode(self)
@classproperty
def trails_verbose_name(cls):
return _("Trails")
@property
def trails_display(self):
trails = getattr(self, '_trails', self.trails)
if trails:
return ", ".join([t.name_display for t in trails])
return _("None")
@property
def trails_csv_display(self):
trails = getattr(self, '_trails', self.trails)
if trails:
return ", ".join([unicode(t) for t in trails])
return _("None")
@property
def usages_display(self):
return u", ".join([unicode(u) for u in self.usages.all()])
@property
def networks_display(self):
return u", ".join([unicode(n) for n in self.networks.all()])
@classmethod
def get_create_label(cls):
return _(u"Add a new path")
@property
def checkbox(self):
return u'<input type="checkbox" name="{}[]" value="{}" />'.format('path',
self.pk)
@classproperty
def checkbox_verbose_name(cls):
return _("Action")
@property
def checkbox_display(self):
return self.checkbox
def merge_path(self, path_to_merge):
"""
Path unification
:param path_to path_to_merge: Path instance to merge
:return: Boolean
"""
if (self.pk and path_to_merge) and (self.pk != path_to_merge.pk):
conn = connections[DEFAULT_DB_ALIAS]
cursor = conn.cursor()
sql = "SELECT ft_merge_path({}, {});".format(self.pk, path_to_merge.pk)
cursor.execute(sql)
result = cursor.fetchall()[0][0]
if result:
# reload object after unification
self.reload()
return result
@property
def extent(self):
return self.geom.transform(settings.API_SRID, clone=True).extent if self.geom else None
def matches(self, eo_object, containment="overlaps"):
if not len(self):
return True
bbox = [None, None, None, None]
srid = self.srid
if srid is None:
srid = 4326
max_extent = crss.crs_bounds(srid)
tolerance = crss.crs_tolerance(srid)
footprint = eo_object.footprint
begin_time = eo_object.begin_time
end_time = eo_object.end_time
for subset in self:
if isinstance(subset, Slice):
is_slice = True
value = subset.value
elif isinstance(subset, Trim):
is_slice = False
low = subset.low
high = subset.high
if subset.is_temporal:
if is_slice:
if begin_time > value or end_time < value:
return False
elif low is None and high is not None:
if begin_time > high:
return False
elif low is not None and high is None:
if end_time < low:
return False
else:
if begin_time > high or end_time < low:
return False
else:
if is_slice:
if subset.is_x:
line = LineString(
(value, max_extent[1]),
(value, max_extent[3])
)
else:
line = LineString(
(max_extent[0], value),
(max_extent[2], value)
)
line.srid = srid
if srid != 4326:
line.transform(4326)
if not line.intersects(footprint):
return False
else:
if subset.is_x:
bbox[0] = subset.low
bbox[2] = subset.high
else:
bbox[1] = subset.low
bbox[3] = subset.high
if bbox != [None, None, None, None]:
bbox = map(
lambda v: v[0] if v[0] is not None else v[1],
zip(bbox, max_extent)
)
bbox[0] -= tolerance
bbox[1] -= tolerance
bbox[2] += tolerance
bbox[3] += tolerance
logger.debug(
"Applying BBox %s with containment '%s'." % (bbox, containment)
)
poly = Polygon.from_bbox(bbox)
poly.srid = srid
if srid != 4326:
poly.transform(4326)
if containment == "overlaps":
if not footprint.intersects(poly):
return False
elif containment == "contains":
if not footprint.within(poly):
return False
return True
def render_static(request,
height=None,
width=None,
format='png',
background='satellite',
bounds=None,
center=None,
render_srid=3857):
# width and height
width = int(width)
height = int(height)
if width > settings.MAX_IMAGE_DIMENSION or \
height > settings.MAX_IMAGE_DIMENSION or \
width <= 1 or height <= 1:
logging.debug("Invalid size")
return HttpResponseBadRequest(
"Invalid image size, both dimensions must be in range %i-%i" %
(1, settings.MAX_IMAGE_DIMENSION))
# image format
if format not in IMAGE_FORMATS:
logging.error("unknown image format %s" % format)
return HttpResponseBadRequest(
"Unknown image format, available formats: " +
", ".join(IMAGE_FORMATS))
if format.startswith('png'):
mimetype = 'image/png'
elif format.startswith('jpeg'):
mimetype = 'image/jpeg'
# bounds
bounds_box = None
if bounds:
bounds_components = bounds.split(',')
if len(bounds_components) != 4:
return HttpResponseBadRequest(
"Invalid bounds, must be 4 , separated numbers")
bounds_components = [float(f) for f in bounds_components]
if not (-180 < bounds_components[0] <
180) or not (-180 < bounds_components[2] < 180):
logging.error("x out of range %f or %f" %
(bounds_components[0], bounds_components[2]))
return HttpResponseBadRequest(
"x out of range %f or %f" %
(bounds_components[0], bounds_components[2]))
if not (-90 < bounds_components[1] <
90) or not (-90 < bounds_components[3] < 90):
logging.error("y out of range %f or %f" %
(bounds_components[1], bounds_components[3]))
return HttpResponseBadRequest(
"y out of range %f or %f" %
(bounds_components[1], bounds_components[3]))
ll = Point(bounds_components[0], bounds_components[1], srid=4326)
ll.transform(render_srid)
ur = Point(bounds_components[2], bounds_components[3], srid=4326)
ur.transform(render_srid)
bounds_box = mapnik.Box2d(ll.x, ll.y, ur.x, ur.y)
elif center:
center_components = center.split(',')
if len(center_components) != 3:
return HttpResponseBadRequest()
lon = float(center_components[0])
lat = float(center_components[1])
zoom = int(center_components[2])
# todo calc bounds from center and zoom
# baselayer
if background not in settings.BASE_LAYERS and background != 'none':
return HttpResponseNotFound("Background not found")
# GeoJSON post data
if request.method == "POST" and len(request.body):
input_data = json.loads(request.body)
else:
input_data = None
if not bounds and not center and not input_data:
return HttpResponseBadRequest(
"Bounds, center, or post data is required.")
# initialize map
m = mapnik.Map(width, height)
m.srs = '+init=epsg:' + str(render_srid)
# add a tile source as a background
if background != "none":
background_file = settings.BASE_LAYERS[background]
background_style = mapnik.Style()
background_rule = mapnik.Rule()
background_rule.symbols.append(mapnik.RasterSymbolizer())
background_style.rules.append(background_rule)
m.append_style('background style', background_style)
tile_layer = mapnik.Layer('background')
tile_layer.srs = '+init=epsg:' + str(render_srid)
tile_layer.datasource = mapnik.Gdal(base=settings.BASE_LAYER_DIR,
file=background_file)
tile_layer.styles.append('background style')
m.layers.append(tile_layer)
# add features from geojson
if input_data and input_data['type'] == "Feature":
features = [input_data]
elif input_data and input_data['type'] == "FeatureCollection":
if 'features' not in input_data:
return HttpResponseBadRequest()
features = input_data['features']
else:
features = []
logging.debug("Adding %d features to map" % len(features))
geometries = []
point_features = []
fid = 0
for feature in features:
if 'geometry' not in feature:
logging.debug("feature does not have geometry")
return HttpResponseBadRequest("Feature does not have a geometry")
if 'type' not in feature['geometry']:
logging.debug("geometry does not have type")
return HttpResponseBadRequest("Geometry does not have a type")
fid += 1
style_name = str(fid)
if feature['geometry']['type'] == 'Point':
point_features.append(feature)
elif feature['geometry']['type'] in ('LineString', 'MultiLineString'):
if feature['geometry']['type'] == 'LineString':
geos_feature = LineString(feature['geometry']['coordinates'])
elif feature['geometry']['type'] == 'MultiLineString':
rings = feature['geometry']['coordinates']
rings = [[(c[0], c[1]) for c in r] for r in rings]
if len(rings) == 1:
geos_feature = LineString(rings[0])
else:
linestrings = []
for ring in rings:
try:
linestrings.append(LineString(ring))
except Exception, e:
logging.error("Error adding ring: %s", e)
geos_feature = MultiLineString(linestrings)
geos_feature.srid = 4326
geos_feature.transform(render_srid)
geometries.append(geos_feature)
style = mapnik.Style()
line_rule = mapnik.Rule()
style_dict = None
if 'style' in feature:
style_dict = feature['style']
elif 'properties' in feature:
style_dict = feature['properties']
line_rule.symbols.append(line_symbolizer(style_dict))
style.rules.append(line_rule)
m.append_style(style_name, style)
wkt = geos_feature.wkt
line_layer = mapnik.Layer(style_name + ' layer')
line_layer.datasource = mapnik.CSV(inline='wkt\n' + '"' + wkt +
'"')
line_layer.styles.append(style_name)
line_layer.srs = '+init=epsg:' + str(render_srid)
m.layers.append(line_layer)
elif feature['geometry']['type'] == 'Polygon':
geos_feature = GEOSGeometry(json.dumps(feature['geometry']))
geos_feature.srid = 4326
geos_feature.transform(render_srid)
geometries.append(geos_feature)
style = mapnik.Style()
rule = mapnik.Rule()
style_dict = None
if 'style' in feature:
style_dict = feature['style']
elif 'properties' in feature:
style_dict = feature['properties']
rule.symbols.append(polygon_symbolizer(style_dict))
rule.symbols.append(line_symbolizer(style_dict))
style.rules.append(rule)
m.append_style(style_name, style)
wkt = geos_feature.wkt
layer = mapnik.Layer(style_name + ' layer')
layer.datasource = mapnik.CSV(inline='wkt\n' + '"' + wkt + '"')
layer.styles.append(style_name)
layer.srs = '+init=epsg:' + str(render_srid)
m.layers.append(layer)
def filter(self, queryset, containment="overlaps"):
""" Filter a :class:`Django QuerySet <django.db.models.query.QuerySet>`
of objects inheriting from :class:`EOObject
<eoxserver.resources.coverages.models.EOObject>`.
:param queryset: the ``QuerySet`` to filter
:param containment: either "overlaps" or "contains"
:returns: a ``QuerySet`` with additional filters applied
"""
if not len(self):
return queryset
qs = queryset
bbox = [None, None, None, None]
srid = self.srid
if srid is None:
srid = 4326
max_extent = crss.crs_bounds(srid)
tolerance = crss.crs_tolerance(srid)
# check if time intervals are configured as "open" or "closed"
config = get_eoxserver_config()
reader = SubsetConfigReader(config)
if reader.time_interval_interpretation == "closed":
gt_op = "__gte"
lt_op = "__lte"
else:
gt_op = "__gt"
lt_op = "__lt"
for subset in self:
if isinstance(subset, Slice):
is_slice = True
value = subset.value
elif isinstance(subset, Trim):
is_slice = False
low = subset.low
high = subset.high
# we need the value in case low == high
value = low
if subset.is_temporal:
if is_slice or (high == low and containment == "overlaps"):
qs = qs.filter(
begin_time__lte=value,
end_time__gte=value
)
elif high == low:
qs = qs.filter(
begin_time__gte=value,
end_time__lte=value
)
else:
# check if the temporal bounds must be strictly contained
if containment == "contains":
if high is not None:
qs = qs.filter(**{
"end_time" + lt_op: high
})
if low is not None:
qs = qs.filter(**{
"begin_time" + gt_op: low
})
# or just overlapping
else:
if high is not None:
qs = qs.filter(**{
"begin_time" + lt_op: high
})
if low is not None:
qs = qs.filter(**{
"end_time" + gt_op: low
})
else:
if is_slice:
if subset.is_x:
line = LineString(
(value, max_extent[1]),
(value, max_extent[3])
)
else:
line = LineString(
(max_extent[0], value),
(max_extent[2], value)
)
line.srid = srid
if srid != 4326:
line.transform(4326)
qs = qs.filter(footprint__intersects=line)
else:
if subset.is_x:
bbox[0] = subset.low
bbox[2] = subset.high
else:
bbox[1] = subset.low
bbox[3] = subset.high
if bbox != [None, None, None, None]:
bbox = map(
lambda v: v[0] if v[0] is not None else v[1],
zip(bbox, max_extent)
)
bbox[0] -= tolerance
bbox[1] -= tolerance
bbox[2] += tolerance
bbox[3] += tolerance
logger.debug(
"Applying BBox %s with containment '%s'." % (bbox, containment)
)
poly = Polygon.from_bbox(bbox)
poly.srid = srid
if srid != 4326:
poly.transform(4326)
if containment == "overlaps":
qs = qs.filter(footprint__intersects=poly)
elif containment == "contains":
qs = qs.filter(footprint__within=poly)
return qs
def length(self):
line = LineString(
[location.point for location in self.locations.all()], srid=4326)
line.transform(3395)
return line.length / 1000
def matches(self, eo_object, containment="overlaps"):
""" Check if the given :class:`EOObject
<eoxserver.resources.coverages.models.EOObject>` matches the given
subsets.
:param eo_object: the ``EOObject`` to match
:param containment: either "overlaps" or "contains"
:returns: a boolean value indicating if the object is contained in the
given subsets
"""
if not len(self):
return True
bbox = [None, None, None, None]
srid = self.srid
if srid is None:
srid = 4326
max_extent = crss.crs_bounds(srid)
tolerance = crss.crs_tolerance(srid)
# check if time intervals are configured as "open" or "closed"
config = get_eoxserver_config()
reader = SubsetConfigReader(config)
# note that the operator is inverted from filter() above as the
# filters use an inclusive search whereas here it's exclusive
if reader.time_interval_interpretation == "closed":
gt_op = operator.gt
lt_op = operator.lt
else:
gt_op = operator.ge
lt_op = operator.le
footprint = eo_object.footprint
begin_time = eo_object.begin_time
end_time = eo_object.end_time
for subset in self:
if isinstance(subset, Slice):
is_slice = True
value = subset.value
elif isinstance(subset, Trim):
is_slice = False
low = subset.low
high = subset.high
# we need the value in case low == high
value = low
if subset.is_temporal:
if is_slice or (low == high and containment == "overlaps"):
if begin_time > value or end_time < value:
return False
elif low == high:
if begin_time < value or end_time > value:
return False
else:
# check if the temporal bounds must be strictly contained
if containment == "contains":
if high is not None:
if gt_op(end_time, high):
return False
if low is not None:
if lt_op(begin_time, low):
return False
# or just overlapping
else:
if high is not None:
if gt_op(begin_time, high):
return False
if low is not None:
if lt_op(end_time, low):
return False
else:
if is_slice:
if subset.is_x:
line = LineString(
(value, max_extent[1]),
(value, max_extent[3])
)
else:
line = LineString(
(max_extent[0], value),
(max_extent[2], value)
)
line.srid = srid
if srid != 4326:
line.transform(4326)
if not line.intersects(footprint):
return False
else:
if subset.is_x:
bbox[0] = subset.low
bbox[2] = subset.high
else:
bbox[1] = subset.low
bbox[3] = subset.high
if bbox != [None, None, None, None]:
bbox = map(
lambda v: v[0] if v[0] is not None else v[1],
zip(bbox, max_extent)
)
bbox[0] -= tolerance
bbox[1] -= tolerance
bbox[2] += tolerance
bbox[3] += tolerance
logger.debug(
"Applying BBox %s with containment '%s'." % (bbox, containment)
)
poly = Polygon.from_bbox(bbox)
poly.srid = srid
if srid != 4326:
poly.transform(4326)
if containment == "overlaps":
if not footprint.intersects(poly):
return False
elif containment == "contains":
if not footprint.within(poly):
return False
return True
def save_into_database(rib_path, rmb_path, putdict, sewerdict, rmberrors):
# Get sewerage name, try to create sewerage
# If it exists, return with an error
sewerage_name = os.path.basename(rmb_path)[:-4] # Minus ".RMB"
if models.Sewerage.objects.filter(name=sewerage_name).exists():
rmberrors.append(
Error(line_number=0,
message=("Er bestaat al een stelsel met de naam {name}. "
"Verwijder het op de archiefpagina, of gebruik "
"een andere naam.").format(name=sewerage_name)))
return
# Files are copied only at the end
sewerage = models.Sewerage.objects.create(
name=sewerage_name,
rib=None, # Filled in later
rmb=None,
active=True)
# Save the puts, keep a dictionary
saved_puts = dict()
for put_id, putinfo in putdict.items():
saved_puts[put_id] = models.Manhole.objects.create(
sewerage=sewerage,
code=put_id,
sink=int(putinfo['is_sink']),
ground_level=putinfo['surface_level'],
the_geom=Point(*putinfo['coordinate']))
# Save the sewers, use the dictionary
saved_sewers = dict()
for sewer_id, sewerinfo in sewerdict.items():
manhole1 = saved_puts[sewerinfo['manhole_code_1']]
manhole2 = saved_puts[sewerinfo['manhole_code_2']]
sewer_line_rd = LineString(manhole1.the_geom, manhole2.the_geom)
sewer_line_rd.set_srid(4326)
sewer_line_rd.transform(RD)
saved_sewers[sewer_id] = models.Sewer.objects.create(
sewerage=sewerage,
code=sewer_id,
quality=models.Sewer.QUALITY_UNKNOWN,
diameter=sewerinfo['diameter'],
manhole1=manhole1,
manhole2=manhole2,
bob1=sewerinfo['bob_1'],
bob2=sewerinfo['bob_2'],
the_geom=LineString(manhole1.the_geom, manhole2.the_geom),
the_geom_length=sewer_line_rd.length)
# Save the measurements
sewer_measurements_dict = dict()
for sewer_id, sewerinfo in sewerdict.items():
measurements = sewerinfo['measurements']
sewer = saved_sewers[sewer_id]
if measurements:
sewer_measurements = [
# Create the SewerMeasurement objects, but don't save
# them yet!
models.SewerMeasurement(sewer=sewer,
dist=m['dist'],
virtual=False,
water_level=None,
flooded_pct=None,
bob=m['bob'],
obb=m['bob'] + sewerinfo['diameter'],
the_geom=Point(*m['coordinate']))
for m in measurements
]
# Quality
sewer.judge_quality(sewer_measurements)
sewer.save()
# BOB correction ("sawtooth" phenomenon)
correct_bob_values(sewer, sewer_measurements)
# Create two virtual sewer measurements for the start and
# end of the sewer
virtual_start = models.SewerMeasurement(
sewer=sewer,
dist=0,
virtual=True,
water_level=None,
flooded_pct=None,
bob=sewer.bob1,
obb=sewer.bob1 + sewerinfo['diameter'],
the_geom=sewer.manhole1.the_geom)
virtual_end = models.SewerMeasurement(
sewer=sewer,
dist=sewer.the_geom_length,
virtual=True,
water_level=None,
flooded_pct=None,
bob=sewer.bob2,
obb=sewer.bob2 + sewerinfo['diameter'],
the_geom=sewer.manhole2.the_geom)
# Note: we MUST add those two virtual points only after
# doing the sawtooth correction, otherwise the sawtooth
# correction will think that everything is fine already
# since the first and end points would be equal to the
# bobs of the sewer...
sewer_measurements = ([virtual_start] + sewer_measurements +
[virtual_end])
sewer_measurements_dict[sewer_id] = sewer_measurements
else:
# Create "virtual measurements"
sewer_measurements_dict[sewer_id] = list(
virtual_measurements(sewer))
sewer.quality = models.Sewer.QUALITY_UNKNOWN
sewer.save()
# Actually compute the lost capacity, the point of this app
lost_capacity.compute_lost_capacity(saved_puts, saved_sewers,
sewer_measurements_dict)
# Save all the SewerMeasurement objects to the database. Since
# there are thousands of them, it is essential to use bulk_create.
models.SewerMeasurement.objects.bulk_create(
list(chain(*sewer_measurements_dict.values())))
# Success -- copy files
sewerage.move_files(rib_path, rmb_path)
# The clap on the fireworks
sewerage.generate_rib()
def get_filters(self, containment="overlaps"):
""" Filter a :class:`Django QuerySet <django.db.models.query.QuerySet>`
of objects inheriting from :class:`EOObject
<eoxserver.resources.coverages.models.EOObject>`.
:param queryset: the ``QuerySet`` to filter
:param containment: either "overlaps" or "contains"
:returns: a ``dict`` with the filters
"""
filters = {}
if not len(self):
return filters
bbox = [None, None, None, None]
srid = self.srid
if srid is None:
srid = 4326
max_extent = crss.crs_bounds(srid)
tolerance = crss.crs_tolerance(srid)
# check if time intervals are configured as "open" or "closed"
config = get_eoxserver_config()
reader = SubsetConfigReader(config)
if reader.time_interval_interpretation == "closed":
gt_op = "__gte"
lt_op = "__lte"
else:
gt_op = "__gt"
lt_op = "__lt"
for subset in self:
if isinstance(subset, Slice):
is_slice = True
value = subset.value
elif isinstance(subset, Trim):
is_slice = False
low = subset.low
high = subset.high
# we need the value in case low == high
value = low
if subset.is_temporal:
if is_slice or (high == low and containment == "overlaps"):
filters['begin_time__lte'] = value
filters['end_time__gte'] = value
elif high == low:
filters['begin_time__gte'] = value
filters['end_time__lte'] = value
else:
# check if the temporal bounds must be strictly contained
if containment == "contains":
if high is not None:
filters['end_time' + lt_op] = high
if low is not None:
filters['begin_time' + gt_op] = low
# or just overlapping
else:
if high is not None:
filters['begin_time' + lt_op] = high
if low is not None:
filters['end_time' + gt_op] = low
else:
if is_slice:
if subset.is_x:
line = LineString(
(value, max_extent[1]),
(value, max_extent[3])
)
else:
line = LineString(
(max_extent[0], value),
(max_extent[2], value)
)
line.srid = srid
if srid != 4326:
line.transform(4326)
filters['footprint__intersects'] = line
else:
if subset.is_x:
bbox[0] = subset.low
bbox[2] = subset.high
else:
bbox[1] = subset.low
bbox[3] = subset.high
if bbox != [None, None, None, None]:
bbox = list(map(
lambda v: v[0] if v[0] is not None else v[1],
zip(bbox, max_extent)
))
bbox[0] -= tolerance
bbox[1] -= tolerance
bbox[2] += tolerance
bbox[3] += tolerance
logger.debug(
"Applying BBox %s with containment '%s'." % (bbox, containment)
)
poly = Polygon.from_bbox(bbox)
poly.srid = srid
if srid != 4326:
poly.transform(4326)
if containment == "overlaps":
filters['footprint__intersects'] = poly
elif containment == "contains":
filters['footprint__within'] = poly
return filters
def matches(self, eo_object, containment="overlaps"):
""" Check if the given :class:`EOObject
<eoxserver.resources.coverages.models.EOObject>` matches the given
subsets.
:param eo_object: the ``EOObject`` to match
:param containment: either "overlaps" or "contains"
:returns: a boolean value indicating if the object is contained in the
given subsets
"""
if not len(self):
return True
bbox = [None, None, None, None]
srid = self.srid
if srid is None:
srid = 4326
max_extent = crss.crs_bounds(srid)
tolerance = crss.crs_tolerance(srid)
# check if time intervals are configured as "open" or "closed"
config = get_eoxserver_config()
reader = SubsetConfigReader(config)
# note that the operator is inverted from filter() above as the
# filters use an inclusive search whereas here it's exclusive
if reader.time_interval_interpretation == "closed":
gt_op = operator.gt
lt_op = operator.lt
else:
gt_op = operator.ge
lt_op = operator.le
footprint = eo_object.footprint
begin_time = eo_object.begin_time
end_time = eo_object.end_time
for subset in self:
if isinstance(subset, Slice):
is_slice = True
value = subset.value
elif isinstance(subset, Trim):
is_slice = False
low = subset.low
high = subset.high
# we need the value in case low == high
value = low
if subset.is_temporal:
if is_slice or (low == high and containment == "overlaps"):
if begin_time > value or end_time < value:
return False
elif low == high:
if begin_time < value or end_time > value:
return False
else:
# check if the temporal bounds must be strictly contained
if containment == "contains":
if high is not None:
if gt_op(end_time, high):
return False
if low is not None:
if lt_op(begin_time, low):
return False
# or just overlapping
else:
if high is not None:
if gt_op(begin_time, high):
return False
if low is not None:
if lt_op(end_time, low):
return False
else:
if is_slice:
if subset.is_x:
line = LineString(
(value, max_extent[1]),
(value, max_extent[3])
)
else:
line = LineString(
(max_extent[0], value),
(max_extent[2], value)
)
line.srid = srid
if srid != 4326:
line.transform(4326)
if not line.intersects(footprint):
return False
else:
if subset.is_x:
bbox[0] = subset.low
bbox[2] = subset.high
else:
bbox[1] = subset.low
bbox[3] = subset.high
if bbox != [None, None, None, None]:
bbox = map(
lambda v: v[0] if v[0] is not None else v[1],
zip(bbox, max_extent)
)
bbox[0] -= tolerance
bbox[1] -= tolerance
bbox[2] += tolerance
bbox[3] += tolerance
logger.debug(
"Applying BBox %s with containment '%s'." % (bbox, containment)
)
poly = Polygon.from_bbox(bbox)
poly.srid = srid
if srid != 4326:
poly.transform(4326)
if containment == "overlaps":
if not footprint.intersects(poly):
return False
elif containment == "contains":
if not footprint.within(poly):
return False
return True
def handle(self, *args, **options):
# Parse arguments.
if len(args) < 2 or len(args) > 3:
raise CommandError("Missing arguments. Try running with --help.")
shapefile_base = args[0]
agency_name = args[1]
srid = int(args[2]) if len(args) > 2 else None
# Verify the agency name.
try:
agency = Agency.objects.get(agency_name=agency_name)
except Agency.DoesNotExist:
self.stderr.write("No agency found for '%s'.\n" % agency_name)
if Agency.objects.all():
self.stderr.write("Agency name must be one of:\n")
for agency in Agency.objects.all():
self.stderr.write("- %s\n" % agency.agency_name)
return
# Read in the shapefile.
self.stdout.write("Reading shapefile from '%s'.\n" % shapefile_base)
sf = shapefile.Reader(shapefile_base)
# Verify that there is a NAME field in this shapefile.
# Ignore first field ('DeletionField' added by shapefile library).
name_index = [f[0] for f in sf.fields[1:]].index('NAME')
if not srid:
# Try opening a .prj file to get the shapefile projection.
prj_file = open(shapefile_base + '.prj')
prj_text = prj_file.read()
# Connect to API to get SRID from projection, if not provided.
# Inspired by http://gis.stackexchange.com/a/7784
self.stdout.write("Querying prj2epsg to find SRID.\n")
url = 'http://prj2epsg.org/search.json'
query = urlencode(
{'exact': True,
'error': True,
'mode': 'wkt',
'terms': prj_text})
response = urlopen(url, query)
data = json.loads(response.read())
srid = int(data['codes'][0]['code'])
self.stdout.write("Using SRID %d.\n" % srid)
for shaperecord in sf.shapeRecords():
shape = shaperecord.shape
record = shaperecord.record
# Get name of the record.
name = record[name_index]
self.stdout.write("Finding patterns for shape '%s'.\n" % name)
# Verify that this shape is a PolyLine (type 3).
if 3 != shape.shapeType:
pass
# Create the LineString with the appropriate SRID
ls = LineString([list(pt) for pt in shape.points], srid=srid)
# Transform into a common SRID (4326).
ls.transform(4326)
# Find the routes and patterns that are covered by this shape.
# Consider all patterns where both the start and end stops are
# within a certain distance to the shape.
distance_threshold = 1609
cursor = connection.cursor()
# Find matching pattern ID, shape ID, and first and last stop locations.
query = 'SELECT a.pattern_id, gp.shape_id, first_stop_location, last_stop_location FROM (SELECT pattern_id, gs.stop_id AS first_stop_id, location AS first_stop_location, stop_name AS first_stop_name FROM gtfs_patternstop gps INNER JOIN gtfs_stop gs ON gps.stop_id = gs.id WHERE gps.order = 0) a INNER JOIN (SELECT gps.pattern_id, gs.stop_id AS last_stop_id, location AS last_stop_location, stop_name AS last_stop_name FROM gtfs_patternstop gps INNER JOIN (SELECT pattern_id, MAX(gps.order) max_order FROM gtfs_patternstop gps GROUP BY pattern_id) gps2 ON gps.pattern_id = gps2.pattern_id AND gps.order = gps2.max_order INNER JOIN gtfs_stop gs ON gps.stop_id = gs.id) b ON a.pattern_id = b.pattern_id INNER JOIN gtfs_pattern gp ON a.pattern_id = gp.id INNER JOIN gtfs_route gr ON gp.route_id = gr.id WHERE gr.agency_id = %s AND ST_Distance_Sphere(first_stop_location, ST_Line_Interpolate_Point(ST_GeomFromEWKB(%s), ST_Line_Locate_Point(ST_GeomFromEWKB(%s), first_stop_location))) < %s AND ST_Distance_Sphere(last_stop_location, ST_Line_Interpolate_Point(ST_GeomFromEWKB(%s), ST_Line_Locate_Point(ST_GeomFromEWKB(%s), last_stop_location))) < %s AND (gr.route_short_name ILIKE %s OR gr.route_long_name ILIKE %s) AND gp.shape_id IS NOT NULL'
args = [agency.id, ls.ewkb, ls.ewkb, distance_threshold, ls.ewkb, ls.ewkb, distance_threshold, name, name]
cursor.execute(query, args)
data = cursor.fetchall()
for row in data:
pattern_id = row[0]
shape_id = row[1]
first_stop_location = row[2]
last_stop_location = row[3]
# Cut the shape between the first and last stops.
query = 'SELECT ST_Line_Substring(ST_GeomFromEWKB(%s), LEAST(ST_Line_Locate_Point(%s, %s), ST_Line_Locate_Point(%s, %s)), GREATEST(ST_Line_Locate_Point(%s, %s), ST_Line_Locate_Point(%s, %s)))'
args = [ls.ewkb, ls.ewkb, first_stop_location, ls.ewkb, last_stop_location, ls.ewkb, first_stop_location, ls.ewkb, last_stop_location]
cursor.execute(query, args)
substring = cursor.fetchall()[0]
# Update the database with the new partial shape.
query = 'UPDATE gtfs_shape SET line=%s WHERE id=%s'
args = [substring, shape_id]
cursor.execute(query, args)
transaction.commit_unless_managed()