Hi Dane, Thanks for the response. Unfortunately this doesn't seem to solve my issue. In fact when I specify epsg:4326 my tiles come up empty (meaning none of the shapes in my shapefile appear in the tiles)
For the tile I have been testing with, the details are 256x256 map, using the xml file and shapefile I attached. bounding box = Envelope(-122.183074951,37.4770377967,-122.18170166,37.4781276287) there are a number of shapes in my shapefile that should fall within that bounding box (when I load my shapefile into Google earth, they do) but the outputted image is just a transparent square. Thanks David On Mon, Feb 14, 2011 at 9:09 PM, Dane Springmeyer <[email protected]> wrote: > David, > > If you do not provide an 'srs' value for a <Layer ..> in your Mapnik XML > then the srs will be inherited from the <Map ..> 'srs'. In your case your > Map is correctly in Spherical Mercator but your data looks to be in WGS84, > or EPSG:4326. So, try changing your layer entry to look like: > > <Layer name="plots" srs="+init=epsg:4326" status="on"> > > When I do this things appear correctly when overlaid on top of OSM tiles > (when rendered with TileLite). > > It appears like your data is at: > http://tile.openstreetmap.org/17/21050/50798.png > > Dane > > > On Feb 14, 2011, at 3:22 PM, David Wiesen wrote: > > When you say generate_tiles.py, do you mean this? > > > http://svn.openstreetmap.org/applications/rendering/mapnik/generate_tiles.py > > When I generate the tiles myself, the lat/long calculations are correct > (well, > they match what I see here > http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/) > > but it appears that the actual shapes from the shapefile don't match up > with the base map > provided by Google once the shapes are projected onto the png file. > > Thanks, > David > > On Mon, Feb 14, 2011 at 3:15 PM, M∡rtin Koppenhoefer < > [email protected]> wrote: > >> I suggest you use generate_tiles.py and modify it. It will create >> tiles at the same position and zoom levels then google maps. >> >> cheers, >> Martin >> > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > > >
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