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Updated RasterColorizer (markdown)

Andrey-VI 2013-07-20 08:08:42 -07:00
parent 1140a7b854
commit b9cc5a250a
1 changed files with 5 additions and 3 deletions
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RasterColorizer.md

@ -12,7 +12,7 @@ The Raster Colorizer allows the palette of rasters to be modified, for example,
To use the colorizer, create a style with a raster symbolizer and add a raster colorizer to it. To use the colorizer, create a style with a raster symbolizer and add a raster colorizer to it.
The DataSource making use of the syle must be a single band raster opened with the gdal input plugin. It will not work with other input plugins; and it will not work if more than one band is loaded. The DataSource making use of the style must be a single band raster opened with the GDAL input plugin. It will not work with other input plugins; and it will not work if more than one band is loaded.
The colorizer works in the following way: The colorizer works in the following way:
@ -40,7 +40,9 @@ Inherit is only valid for stops, and not the default colorizer mode. It means th
# XML # XML
## RasterColorizer element ## RasterColorizer element
Required attributes: none Required attributes: none
Optional attributes: Optional attributes:
* _default-mode_ This can be either "discrete", "linear" or "exact". If it is not specified then the default is "linear". * _default-mode_ This can be either "discrete", "linear" or "exact". If it is not specified then the default is "linear".
@ -69,8 +71,8 @@ See https://github.com/mapnik/mapnik/blob/master/tests/data/good_maps/raster_sym
In this example XML, the following value to color translation is performed: In this example XML, the following value to color translation is performed:
* -inf <= x < -1000 white * -inf <= x < -1000 white
* -1000 <= x < -500 blue * -1000 <= x < -500 blue
* -500 <= x < 0 red * -500 <= x < 0 red
* 0 <= x < 5 yellow blending to white * 0 <= x < 5 yellow blending to white
* 5 <= x < 10 white blending to red * 5 <= x < 10 white blending to red