def hook_rebuild(self):
self.img = Image.new('RGBA', (SIZE,SIZE), (255,255,255,0))
draw = ImageDraw.Draw(self.img)
if len(self.colorScheme) > 0:
colors = self.colorScheme.keys()
for color in colors:
objIDs = self.colorScheme[color]
if self.shapeType == "POINT":
pts = []
for i in objIDs:
x,y = self.shapeObjects[i]
x, y = gmerc.ll2px(y,x, self.zoom)
x = x - self.x1 -self.pad# account for tile offset relative to
y = y - self.y1 -self.pad# overall map
pts.append((x,y))
pts = list(set(pts))
for x,y in pts:
draw.ellipse( (x-2,y-2,x+2,y+2), fill=color,outline="black")
elif self.shapeType == "MULTIPOLYGON":
for i in objIDs:
poly = self.shapeObjects[i]
_poly = []
for pt in poly:
x, y = gmerc.ll2px(pt[1],pt[0], self.zoom)
x = x - self.x1 -self.pad# account for tile offset relative to
y = y - self.y1 -self.pad# overall map
_poly.append((x,y))
draw.polygon(_poly, outline="black", fill=color)
return self.img
if self.shapeType == "POINT":
pts = []
for x,y in self.shapeObjects:
x, y = gmerc.ll2px(y,x, self.zoom)
x = x - self.x1 -self.pad# account for tile offset relative to
y = y - self.y1 -self.pad# overall map
pts.append((x,y))
pts = list(set(pts))
for x,y in pts:
draw.ellipse( (x-2,y-2,x+2,y+2), fill="red",outline="black")
elif self.shapeType == "POLYGON":
for obj in self.shapeObjects:
for poly in obj.parts:
_poly = []
for pt in poly:
x, y = gmerc.ll2px(pt[1],pt[0], self.zoom)
x = x - self.x1 -self.pad# account for tile offset relative to
y = y - self.y1 -self.pad# overall map
_poly.append((x,y))
draw.polygon(_poly, outline="black", fill="blue")
return self.img
def __init__(self, layer, zoom, x, y):
log.info("Initializing tile");
self.layer = layer
self.zoom = zoom
self.x = x
self.y = y
self.color_scheme = color_scheme.cyan_red
# attempt to get a cached object
self.tile_dump = self.__get_cached_image()
if not self.tile_dump:
log.info("No tile was found, creating one from the input data")
# Get the bounds of this tile
self.width, self.height = gmerc.ll2px(-90, 180, self.zoom)
self.numcols = int(math.ceil(self.width / 256.0))
self.numrows = int(math.ceil(self.height / 256.0))
self.zoom_step = [ 180. / self.numrows, 360. / self.numcols ]
self.georange = ( min(90, max(-90, 180. / self.numrows * y - 90)), min(180, max(-180, 360. / self.numcols * x - 180 )))
# Extra info for provider.get_data
extras = {"lat_north": self.georange[0],
"lng_west": self.georange[1],
"range_lat": self.zoom_step[0],
"range_lng": self.zoom_step[1]}
# Get the points and start plotting data
log.info("Getting the tile points from the provider")
data = provider.get_data(self.zoom, self.layer, **extras)
log.info("Plotting the tile")
self.tile_img = self.plot_image(data)
def center2corners(self, center):
"""Gets the lat/lng value of four corners of the image file
"""
center_px = ll2px(center["lat"], center["lng"], ZOOM_LEVEL)
west_north_corner = px2ll(center_px[0] - SIZE / 2,
center_px[1] - SIZE / 2, ZOOM_LEVEL)
east_north_corner = px2ll(center_px[0] + SIZE / 2,
center_px[1] - SIZE / 2, ZOOM_LEVEL)
west_south_corner = px2ll(center_px[0] - SIZE / 2,
center_px[1] + SIZE / 2, ZOOM_LEVEL)
east_south_corner = px2ll(center_px[0] + SIZE / 2,
center_px[1] + SIZE / 2, ZOOM_LEVEL)
return [{
"lat": west_north_corner[0],
"lng": west_north_corner[1]
}, {
"lat": east_north_corner[0],
"lng": east_north_corner[1]
}, {
"lat": west_south_corner[0],
"lng": west_south_corner[1]
}, {
"lat": east_south_corner[0],
"lng": east_south_corner[1]
}]
def points():
"""Yield x,y pixel coords within this tile, top-left of dot.
"""
for point in q.all():
x, y = gmerc.ll2px(point.latitude, point.longitude, self.zoom)
x = x - self.x1 # account for tile offset relative to
y = y - self.y1 # overall map
yield x-self.pad,y-self.pad,point.magnitude
def points():
"""Yield x,y pixel coords within this tile, top-left of dot.
"""
for point in _points:
x, y = gmerc.ll2px(point['lat'], point['lng'], self.zoom)
x = x - self.x1 # account for tile offset relative to
y = y - self.y1 # overall map
yield x-self.pad,y-self.pad
def get(self):
for metro_id, metro in metros.metro_list.items():
s = metro['lat']['start'] - .1
w = metro['lng']['start'] - .1
n = metro['lat']['end'] + .1
e = metro['lng']['end'] + .1
for zoom in [13, 14]:
x1, y1 = gmerc.ll2px(n, w, zoom)
x2, y2 = gmerc.ll2px(s, e, zoom)
startx = int(math.ceil(x1 / 256.0))
starty = int(math.ceil(y1 / 256.0))
endx = int(math.ceil(x2 / 256.0))
endy = int(math.ceil(y2 / 256.0))
for x in [startx, endx]:
for y in [starty, endy]:
genTile(zoom, x, y, metro_id)
self.response.out.write('Starting at: %d, %d, ending at: %d, %d for zoom: %d\n' % (startx, starty, endx, endy, zoom))
def get(self):
for metro_id, metro in metros.metro_list.items():
s = metro['lat']['start'] - .1
w = metro['lng']['start'] - .1
n = metro['lat']['end'] + .1
e = metro['lng']['end'] + .1
for zoom in [13, 14]:
x1, y1 = gmerc.ll2px(n, w, zoom)
x2, y2 = gmerc.ll2px(s, e, zoom)
startx = int(math.ceil(x1 / 256.0))
starty = int(math.ceil(y1 / 256.0))
endx = int(math.ceil(x2 / 256.0))
endy = int(math.ceil(y2 / 256.0))
for x in [startx, endx]:
for y in [starty, endy]:
genTile(zoom, x, y, metro_id)
self.response.out.write(
'Starting at: %d, %d, ending at: %d, %d for zoom: %d\n' %
(startx, starty, endx, endy, zoom))
def points():
"""Yield x,y pixel coords within this tile, top-left of dot.
"""
for point in _points:
x, y = gmerc.ll2px(point['loc'][1], point['loc'][0], self.zoom)
x = x - self.x1 # account for tile offset relative to
y = y - self.y1 # overall map
if point["type"] in self.pad:
yield {
"loc" : [x-self.pad[point["type"]], y-self.pad[point["type"]]],
"category" : point["type"]
}
def hook_rebuild(self, shp_objects, shp_type):
self.img = Image.new('RGBA', (SIZE,SIZE), (255,255,255,0))
draw = ImageDraw.Draw(self.img)
if shp_type == pysal.cg.Point:
for x,y in shp_objects:
x, y = gmerc.ll2px(y,x, self.zoom)
x = x - self.x1 # account for tile offset relative to
y = y - self.y1 # overall map
draw.ellipse( (x-2,y-2,x+2,y+2), fill="red",outline="black")
elif shp_type == pysal.cg.Polygon:
for obj in shp_objects:
for poly in obj.parts:
_poly = []
for pt in poly:
x, y = gmerc.ll2px(pt[1],pt[0], self.zoom)
x = x - self.x1 # account for tile offset relative to
y = y - self.y1 # overall map
_poly.append((x,y))
draw.polygon(_poly, outline="black", fill="blue")
return self.img
def __init__(self, user, zoom, lat_north, lng_west, offset_x_px, offset_y_px):
self.zoom = zoom
self.decay = 0.5
#dot_radius = int(math.ceil(len(dot[self.zoom]) / 2))
dot_radius = int(math.ceil((self.zoom + 1) * DOT_MULT)) #TODO double check that this is + 1 - because range started from 1 in old dot array?!
# convert to pixel first so we can factor in the dot radius and get the tile bounds
northwest_px = gmerc.ll2px(lat_north, lng_west, zoom)
self.northwest_ll_buffered = gmerc.px2ll(northwest_px[0] + offset_x_px - dot_radius, northwest_px[1] + offset_y_px - dot_radius, zoom)
self.northwest_ll = gmerc.px2ll(northwest_px[0] + offset_x_px , northwest_px[1] + offset_y_px , zoom)
self.southeast_ll_buffered = gmerc.px2ll(northwest_px[0] + offset_x_px + 256 + dot_radius, northwest_px[1] + offset_y_px + 256 + dot_radius, zoom)
self.southeast_ll = gmerc.px2ll(northwest_px[0] + offset_x_px + 256 , northwest_px[1] + offset_y_px + 256 , zoom) # THIS IS IMPORTANT TO PROPERLY CALC latlng_diff
self.latlng_diff_buffered = [ self.southeast_ll_buffered[0] - self.northwest_ll_buffered[0], self.southeast_ll_buffered[1] - self.northwest_ll_buffered[1]]
self.latlng_diff = [ self.southeast_ll[0] - self.northwest_ll[0] , self.southeast_ll[1] - self.northwest_ll[1]]
BasicTile.__init__(self, user, self.northwest_ll_buffered[0], self.northwest_ll_buffered[1], self.latlng_diff_buffered[0], self.latlng_diff_buffered[1])
def __init__(self, user, zoom, lat_north, lng_west, offset_x_px, offset_y_px):
self.zoom = zoom
self.decay = 0.5
#dot_radius = int(math.ceil(len(dot[self.zoom]) / 2))
dot_radius = int(math.ceil((self.zoom + 1) * DOT_MULT)) #TODO double check that this is + 1 - because range started from 1 in old dot array?!
# convert to pixel first so we can factor in the dot radius and get the tile bounds
northwest_px = gmerc.ll2px(lat_north, lng_west, zoom)
self.northwest_ll_buffered = gmerc.px2ll(northwest_px[0] + offset_x_px - dot_radius, northwest_px[1] + offset_y_px - dot_radius, zoom)
self.northwest_ll = gmerc.px2ll(northwest_px[0] + offset_x_px , northwest_px[1] + offset_y_px , zoom)
self.southeast_ll_buffered = gmerc.px2ll(northwest_px[0] + offset_x_px + 256 + dot_radius, northwest_px[1] + offset_y_px + 256 + dot_radius, zoom)
self.southeast_ll = gmerc.px2ll(northwest_px[0] + offset_x_px + 256 , northwest_px[1] + offset_y_px + 256 , zoom) # THIS IS IMPORTANT TO PROPERLY CALC latlng_diff
self.latlng_diff_buffered = [ self.southeast_ll_buffered[0] - self.northwest_ll_buffered[0], self.southeast_ll_buffered[1] - self.northwest_ll_buffered[1]]
self.latlng_diff = [ self.southeast_ll[0] - self.northwest_ll[0] , self.southeast_ll[1] - self.northwest_ll[1]]
BasicTile.__init__(self, user, self.northwest_ll_buffered[0], self.northwest_ll_buffered[1], self.latlng_diff_buffered[0], self.latlng_diff_buffered[1])
def __init__(self, layer, zoom, x, y):
self.layer = layer
self.zoom = zoom
self.x = x
self.y = y
self.color_scheme = color_scheme.cyan_red
self.decay = 0.5
# attempt to get a cached object
self.tile_dump = self.__get_cached_image()
if not self.tile_dump:
# Get the bounds of this tile
self.width, self.height = gmerc.ll2px(-90, 180, self.zoom)
self.numcols = int(math.ceil(self.width / 256.0))
self.numrows = int(math.ceil(self.height / 256.0))
self.zoom_step = [ 180. / self.numrows, 360. / self.numcols ]
self.georange = ( min(90, max(-90, 180. / self.numrows * y - 90)), min(180, max(-180, 360. / self.numcols * x - 180 )))
# Get the points and start plotting data
self.tile_img = self.plot_image(
provider.get_data(self.zoom, self.layer,
self.georange[0], self.georange[1],
self.zoom_step[0], self.zoom_step[1]))
if not fname.endswith('.png'):
continue
name = os.path.splitext(fname)[0]
fspath = os.path.join(_color_schemes_dir, fname)
color_schemes[name] = backend.ColorScheme(name, fspath)
def load_dots(backend):
"""Given a backend module, return a mapping of zoom level to Dot object.
"""
return dict([(zoom, backend.Dot(zoom)) for zoom in range(20)])
dots = load_dots(backend) # factored for easier use from scripts
for zoom in [0,1,2,3,4]:
width, height = ll2px(-90, 180, zoom)
numcols = int(math.ceil(width / 256.0))
numrows = int(math.ceil(height / 256.0))
cs_name = 'classic'
color_scheme = color_schemes[cs_name]
for x in range(numcols):
for y in range(numrows):
fspath = join( aspen.paths.root
, cs_name
, str(zoom)
, "%d,%d" % (x, y)
) + '.png'
tile = backend.Tile(color_scheme, dots, zoom, x, y, fspath)
sys.stdout.write('tile %s\n' % fspath); sys.stdout.flush()
if tile.is_empty():
sys.stdout.write('skipping empty tile %s\n' % fspath)
