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Correct out-of-date information about raster reprojection.

Andy Allan 2014-01-24 03:53:38 -08:00
parent 995d025593
commit c61fed5173
1 changed files with 2 additions and 2 deletions
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RasterSymbolizer.md

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The RasterSymbolizer is used to render an image from any [GDAL supported format](http://www.gdal.org/formats_list.html) using the [[GDAL]] plugin or from GeoTiff's using the [[Raster]] plugin. The RasterSymbolizer is used to render an image from any [GDAL supported format](http://www.gdal.org/formats_list.html) using the [[GDAL]] plugin or from GeoTiff's using the [[Raster]] plugin.
* Mapnik does not yet support on-the-fly reprojection of raster layers (like it does for vector layers) * Mapnik supports on-the-fly reprojection of raster layers (like it does for vector layers)
* Therefore it is necessary to first (externally) warp an image to the Spatial Reference System (srs) used in the map (e.g. using the `gdalwarp` command from the gdal-utilities). * However, for optimal performance it can be best to first (externally) warp an image to the Spatial Reference System (srs) used in the map (e.g. using the `gdalwarp` command from the gdal-utilities).
* As of Mapnik 0.6.0 the RasterSymbolizer supports transparency and composition modes. * As of Mapnik 0.6.0 the RasterSymbolizer supports transparency and composition modes.
* See the original ticket for details: [#259](https://github.com/mapnik/mapnik/issues/259) * See the original ticket for details: [#259](https://github.com/mapnik/mapnik/issues/259)