def handle(self, **options):
c = connections[DB_NAME].cursor()
c.execute("DELETE FROM coastline WHERE ogc_fid >= 1000000;")
transaction.commit(using=DB_NAME)
c.execute("SELECT ogc_fid, wkb_geometry, elevation FROM coastline ORDER BY ogc_fid;")
for row in c.fetchall():
src_fid = row[0]
src_geom = GEOSGeometry(row[1])
src_elevation = row[2]
print "OGC_FID: % 5d - VERTICES: % 8d" % (row[0], src_geom.num_points,)
if src_geom.num_points > SPLIT_THRESHOLD:
for start in range(0, src_geom.num_points, SPLIT_AMOUNT):
new_fid = src_fid * 1000000 + start
new_geom = LineString(src_geom[start:start + SPLIT_AMOUNT + 1])
new_geom.srid = src_geom.srid
c.execute("INSERT INTO coastline (ogc_fid, wkb_geometry, elevation) VALUES (%d, '%s', %f)" % (new_fid, new_geom.hexewkb, src_elevation))
c.execute("DELETE FROM coastline WHERE ogc_fid = %d;" % (src_fid))
transaction.commit(using=DB_NAME)
print " * SPLIT INTO OGC_FID: % 10d - VERTICES: % 8d" % (new_fid, new_geom.num_points)
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
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 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 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 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 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 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 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
def path(self):
points = map(lambda cm: cm.mark.location, self.coursemark_set.all())
if len(points):
path = LineString(*points)
path.srid = SRID
return path