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Updated RasterSymbolizer (markdown)

ThomasG77 2012-01-07 12:24:06 -08:00
parent bf41987816
commit dcc373974b
1 changed files with 2 additions and 1 deletions
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RasterSymbolizer.md

@ -10,7 +10,7 @@ The RasterSymbolizer is used to render an image from any [GDAL supported format]
* 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).
* As of Mapnik 0.6.0 the RasterSymbolizer supports transparency and composition modes.
* See the original ticket for details: #259
* See the original ticket for details: [#259](https://github.com/mapnik/mapnik/issues/259)
* See also [[Compositing]] for some of the effects.
* This Symbolizer is often used with DEM (digital elevation model) data containing missing values (for example NASA SRTM DEM data); to achieve nice rendering, the [gdal_fillnodata.py](http://www.gdal.org/gdal_fillnodata.html) tool might be useful.
@ -34,6 +34,7 @@ Processed as described in http://wiki.openstreetmap.org/wiki/Hillshading_using_t
There are two types of raster datasources: *gdal* or *raster*:
* The [[GDAL]] plugin is more convenient as it can read the file extents automatically and supports any GDAL-supported type of file
* The [[Raster]] driver only works with Tiled or Stripped GeoTIFF files and requires manually setting the file bounds, but can be faster.