ecotrust/create-utfgrids

Simple command line script to create UTFGrid json files from a shapefile

create-utfgrids's Issues

Support for lines and points

NoneType Object has no attribute 'GetLayer'

Hey there,

first, thanks for the work you put into creat_utfgrids. It's just what I was looking for.

I, however, get the following message trying to convert a shapefile into a UTFGrid. The EPSG is 4326:

Traceback (most recent call last):
File "c:\create_utfgrids.py", line 108, in
create_utfgrids(shppath, minzoom, maxzoom, outdir, fields)
File "c:\create_utfgrids.py", line 34, in create_utfgrids
layer = ds.GetLayer(layernum)
AttributeError: 'NoneType' object has no attribute 'GetLayer'

Do you have an idea what the issue could be here?

Thanks a lot!

Versions of python bindings

Hi,
Could you please specify the version of OGR bindings you use to run the script successfully?
Currently getting this traceback:

WARNING:
 This script assumes a polygon shapefile in spherical mercator projection.
 If any of these assumptions are not true, don't count on the results!
Traceback (most recent call last):
  File "./create_utfgrids.py", line 108, in <module>
    create_utfgrids(shppath, minzoom, maxzoom, outdir, fields)
  File "./create_utfgrids.py", line 44, in create_utfgrids
    polygon_symbolizer = mapnik.PolygonSymbolizer(mapnik.Color('#f2eff9'))
Boost.Python.ArgumentError: Python argument types in
    PolygonSymbolizer.__init__(PolygonSymbolizer, Color)
did not match C++ signature:
    __init__(_object*)

instead of attributes I get null value

Running create_utfgrids.py I get json tiles which have null in the attribute.