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Updated Troubleshooting (markdown)

ThomasG77 2012-01-21 09:55:41 -08:00
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Troubleshooting.md

@ -29,7 +29,7 @@ Make sure to check out LearningMapnik for tips on certain topics, and ExampleCod
$ ogr2ogr fixed.shp sketchy_natural_earth.shp -skipfailures -t_srs EPSG:900913 -clipsrc -180 -90 180 90 $ ogr2ogr fixed.shp sketchy_natural_earth.shp -skipfailures -t_srs EPSG:900913 -clipsrc -180 -90 180 90
``` ```
* The '-skipfailures' tells ogr2ogr to skip any features containing bogus coordinates, which is good because they will potentially cause mapnik to render fewer shapes that you'd like (see #308). * The '-skipfailures' tells ogr2ogr to skip any features containing bogus coordinates, which is good because they will potentially cause mapnik to render fewer shapes that you'd like (see [#308](https://github.com/mapnik/mapnik/issues/308)).
* Now, if that results in a shapefile missing key chunks of data, then we need to up the ante and call in some sort of tool to actually clean the topology. You may know of some - in our experience importing into PostGIS, cleaning there, then exporting again to a shapefile works nicely. The clean script comes from Horst Duester and can be downloaded from here: http://www.sogis1.so.ch/sogis/dl/postgis/cleanGeometry.sql. Basically the dance looks like: * Now, if that results in a shapefile missing key chunks of data, then we need to up the ante and call in some sort of tool to actually clean the topology. You may know of some - in our experience importing into PostGIS, cleaning there, then exporting again to a shapefile works nicely. The clean script comes from Horst Duester and can be downloaded from here: http://www.sogis1.so.ch/sogis/dl/postgis/cleanGeometry.sql. Basically the dance looks like: