Hello everybody,
First of all, sorry for my poor english.
I'm rendering a map loading osm.xml, but I want to print over the map a
track (route, or whatever). This route are in a GML file, so there is a way
to do this?
I'm using the example code:
from mapnik import *
import sys, os
if __name__ == "__main__":
try:
mapfile = os.environ['MAPNIK_MAP_FILE']
except KeyError:
mapfile = "osm.xml"
map_uri = "image.png"
#---------------------------------------------------
# Change this to the bounding box you want
#
ll = (-6.5, 49.5, 2.1, 59)
#---------------------------------------------------
z = 10
imgx = 500 * z
imgy = 1000 * z
m = Map(imgx,imgy)
load_map(m,mapfile)
prj = Projection("+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0
+lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgri...@null +no_defs +over")
c0 = prj.forward(Coord(ll[0],ll[1]))
c1 = prj.forward(Coord(ll[2],ll[3]))
bbox = Envelope(c0.x,c0.y,c1.x,c1.y)
m.zoom_to_box(bbox)
im = Image(imgx,imgy)
render(m, im)
view = im.view(0,0,imgx,imgy) # x,y,width,height
view.save(map_uri,'png')
I read that rendering maps follow the painter's algorithm. So, in case that
I could print the route over the map, this code will be previos render(m,im)
line?
Thanks,
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