On Mar 18, 2011, at 4:00 AM, Philip Howarth wrote: > I want to add a track from a gpx file to a map. > > To get started I followed the usage info in the trac documentation - but hit > a problem immediately. > It seems that the Expat library is required: > > >>> mapnik.Ogr(file='c:/test.gpx') > > Traceback (most recent call last): > File "<pyshell#1>", line 1, in <module> > mapnik.Ogr(file='c:/test.gpx') > File "C:\Program Files > (x86)\mapnik-0.7.1\python\2.6\site-packages\mapnik\__init__.py", line 419, in > Ogr > return CreateDatasource(keywords) > RuntimeError: OGR/GPX driver has not been built with read support. Expat > library required > >>>
Hi Philip. I think that the Windows binaries statically link the GDAL/OGR library, and the build that was made clearly does not support Expat. So, I think on windows your only option is to install a new version of GDAL/OGR to convert that .gpx file into something like a shapefile beforehand. The dependency chain for GDAL/OGR is quite large so it is understandable, that Artem, who provides the Mapnik binaries, skipping building GDAL/OGR with Expat support. > > I can run ogrinfo from the command line OK. > > I am running under Windows7 (64 bit) with python 2.6 and mapnik 0.7.1: > >>> sys.version > '2.6.5 (r265:79096, Mar 19 2010, 21:48:26) [MSC v.1500 32 bit (Intel)]'>>> > import mapnik > >>> mapnik.mapnik_version() > 701 > >>> > > I am able to render from postgis without problem. > > I'm somewhat out of my depth here - any help appreciated! > > Philip > > -- > Philip Howarth > Cambridge UK > email: [email protected] > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users
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