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Updated RasterSymbolizer (markdown)

tmcw 2011-12-09 12:08:31 -08:00
parent 1db01b16f2
commit 99df717f8f
1 changed files with 43 additions and 34 deletions
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RasterSymbolizer.md

@ -17,9 +17,12 @@ The RasterSymbolizer is used to render an image from any [GDAL supported format]
* As of Mapnik 0.8 the RasterSymbolizer can be assigned a RasterColorizer to color a raw data raster according to a palette. This is useful for visualizing scientific data, dynamically changing the color gradient of a DEM, etc... * As of Mapnik 0.8 the RasterSymbolizer can be assigned a RasterColorizer to color a raw data raster according to a palette. This is useful for visualizing scientific data, dynamically changing the color gradient of a DEM, etc...
[[BR]] ![tile](http://pavlenko.f2s.com/tiles/srtm3/9/277/197.png)
||[[Image(http://pavlenko.f2s.com/tiles/srtm3/9/277/197.png)]]||[[Image(http://media.mapnik.org/tiles/relief/7/63/42.png)]]||[[Image(http://1.tiles.ump.waw.pl/ump_tiles/12/2265/1395.png)]]||[[Image(http://toolserver.org/~cmarqu/hill/12/2265/1395.png)]] || ![tile](http://media.mapnik.org/tiles/relief/7/63/42.png)
|| || || ||Processed as described in http://wiki.openstreetmap.org/wiki/Hillshading_using_the_Alpha_Channel_of_an_Image|| ![tile](http://1.tiles.ump.waw.pl/ump_tiles/12/2265/1395.png)
![tile](http://toolserver.org/~cmarqu/hill/12/2265/1395.png)
Processed as described in http://wiki.openstreetmap.org/wiki/Hillshading_using_the_Alpha_Channel_of_an_Image
# Usage # Usage
@ -44,44 +47,50 @@ See the [wiki:GDAL] plugin and [wiki:Raster] plugin pages for more info
Default (simply renders a copy of the raster) Default (simply renders a copy of the raster)
#!xml ```xml
<Style name="My Style"> #!xml
<Rule> <Style name="My Style">
<RasterSymbolizer/> <Rule>
</Rule> <RasterSymbolizer/>
</Style> </Rule>
</Style>
```
Using the new 0.6.0 release opacity / merging / scaling options: Using the new 0.6.0 release opacity / merging / scaling options:
#!xml ```xml
<Style name="raster"> #!xml
<Rule> <Style name="raster">
<RasterSymbolizer> <Rule>
<CssParameter name="opacity">0.5</CssParameter> <RasterSymbolizer>
<!--<CssParameter name="scaling">fast</CssParameter>--> <CssParameter name="opacity">0.5</CssParameter>
<CssParameter name="scaling">bilinear</CssParameter> <!--<CssParameter name="scaling">fast</CssParameter>-->
<!--<CssParameter name="scaling">bilinear8</CssParameter>--> <CssParameter name="scaling">bilinear</CssParameter>
<!--<CssParameter name="scaling">bilinear8</CssParameter>-->
<!--<CssParameter name="mode">grain_merge</CssParameter>-->
<!--<CssParameter name="mode">grain_merge2</CssParameter>--> <!--<CssParameter name="mode">grain_merge</CssParameter>-->
<!--<CssParameter name="mode">multiply</CssParameter>--> <!--<CssParameter name="mode">grain_merge2</CssParameter>-->
<CssParameter name="mode">multiply2</CssParameter> <!--<CssParameter name="mode">multiply</CssParameter>-->
<!--<CssParameter name="mode">divide</CssParameter>--> <CssParameter name="mode">multiply2</CssParameter>
<!--<CssParameter name="mode">divide2</CssParameter>--> <!--<CssParameter name="mode">divide</CssParameter>-->
<!--<CssParameter name="mode">screen</CssParameter>--> <!--<CssParameter name="mode">divide2</CssParameter>-->
<!--<CssParameter name="mode">hard_light</CssParameter>--> <!--<CssParameter name="mode">screen</CssParameter>-->
</RasterSymbolizer> <!--<CssParameter name="mode">hard_light</CssParameter>-->
</Rule> </RasterSymbolizer>
</Style> </Rule>
</Style>
```
## Python Styles ## Python Styles
#!python ```python
s = Style() #!python
r=Rule() s = Style()
r.symbols.append(RasterSymbolizer()) r=Rule()
s.rules.append(r) r.symbols.append(RasterSymbolizer())
s.rules.append(r)
```
## C++ ## C++