sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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
Show stats Download patch file Download diff file Expand all files Collapse all files

77
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...
[[BR]]
||[[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)]] ||
|| || || ||Processed as described in http://wiki.openstreetmap.org/wiki/Hillshading_using_the_Alpha_Channel_of_an_Image||
![tile](http://pavlenko.f2s.com/tiles/srtm3/9/277/197.png)
![tile](http://media.mapnik.org/tiles/relief/7/63/42.png)
![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
@ -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)
#!xml
<Style name="My Style">
<Rule>
<RasterSymbolizer/>
</Rule>
</Style>
```xml
#!xml
<Style name="My Style">
<Rule>
<RasterSymbolizer/>
</Rule>
</Style>
```
Using the new 0.6.0 release opacity / merging / scaling options:
#!xml
<Style name="raster">
<Rule>
<RasterSymbolizer>
<CssParameter name="opacity">0.5</CssParameter>
<!--<CssParameter name="scaling">fast</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">multiply</CssParameter>-->
<CssParameter name="mode">multiply2</CssParameter>
<!--<CssParameter name="mode">divide</CssParameter>-->
<!--<CssParameter name="mode">divide2</CssParameter>-->
<!--<CssParameter name="mode">screen</CssParameter>-->
<!--<CssParameter name="mode">hard_light</CssParameter>-->
</RasterSymbolizer>
</Rule>
</Style>
```xml
#!xml
<Style name="raster">
<Rule>
<RasterSymbolizer>
<CssParameter name="opacity">0.5</CssParameter>
<!--<CssParameter name="scaling">fast</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">multiply</CssParameter>-->
<CssParameter name="mode">multiply2</CssParameter>
<!--<CssParameter name="mode">divide</CssParameter>-->
<!--<CssParameter name="mode">divide2</CssParameter>-->
<!--<CssParameter name="mode">screen</CssParameter>-->
<!--<CssParameter name="mode">hard_light</CssParameter>-->
</RasterSymbolizer>
</Rule>
</Style>
```
## Python Styles
#!python
s = Style()
r=Rule()
r.symbols.append(RasterSymbolizer())
s.rules.append(r)
```python
#!python
s = Style()
r=Rule()
r.symbols.append(RasterSymbolizer())
s.rules.append(r)
```
## C++