Hello, my apologies for sending a too long message first. I hope the admin cancelled it.
In osm.xml the GPX source file can be inserted (near the end). When executing "do_track.py", no track is drawn. Here's the original message: Hello Dane, > > is it a hint on what goes wrong? > > No, I think you will need to post a full test case, ideally with a > sample (small) gpx dataset and sample xml styles. I stripped the files down quite a bit and attached them to this mail. A guess is that the problem is something really simple, a typo or similar... None of the attached GPX files work. One of them is based on the example found on Wikipedia. Best regards, Torsten.
osm_track.xml
Description: XML document
#! /usr/bin/python
#coding: latin-1
"""
"""
from mapnik import *
import sys, os
mapfile = "osm_track.xml"
#ll = (8.9, 48.9, 9.1, 49.0)
ll = (-180.0, -89.0, 180.0, 89.0)
imgx = 1600
imgy = 1200
map_uri = "out.png"
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)
e = m.envelope()
print "c0.x", e.minx
print "c0.y", e.miny
print "c1.x", e.maxx
print "c1.y", e.maxy
print "scale", m.scale(), 1.0 / m.scale()
print "denom", m.scale_denominator()
im = Image(imgx, imgy)
render(m, im)
view = im.view(0, 0, imgx, imgy)
view.save(map_uri, 'png')
test.gpx
Description: XML document
ttrack.gpx
Description: XML document
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