I am trying to generate tiles to be overlaid on google maps using mapnik, and am close but the tiles look wrong on the map.
I have a shapefile, and am attempting to create a mapnik map using it combined with an xml configuration file. I then take the tile information from google (tile coord x, tile coord y, zoom), and using this information, create a bounding box. I then zoom a 256x256 (google tile size) map to this bounding box, and create a png file, which I tell google maps to display as a tile. It's pretty simple, but the png doesn't look correct when actually overlaid on google maps. Since I know there will be questions, I have attached a simple version of my html page (with the google map widget), my mapnik xml file, the shape file I am using for data, and the python code I am using to generate the png. I have also include a sample tile png file. All those files can be found here: https://r2-mapnik.s3.amazonaws.com/mapnik.tar I have also uploaded a sample image of the poor result, in case someone can diagnose the problem by seeing the symptom: https://r2-mapnik.s3.amazonaws.com/bad_tile.tiff Thank you for looking, and please let me know if I can clarify my problem in any way. David
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