Hello,
I'm looking to use an SLD in GeoServer 1.5.3. to display a GeoTIFF, with an opacity based on its seperate colors. For example, any color darker than #7F7F7F (grey) will have an opacity of 0.0, while anything lighter, will have a full opacity of 1.0. (Attempting to show clouds).
I've attempted to change the standard 'raster' SLD in as many ways possible, to no avail. I'm wondering if it is even possible for GeoServer to support opacity based on different colors, or if I'm just not yet familiar enough with GeoTIFFS to make it happen.
The gdalinfo for the GeoTIFF I am using:
Driver: GTiff/GeoTIFF
Files: test.tif
Size is 9000, 4500
Coordinate System is:
PROJCS["TeraScan Export",
GEOGCS["Spherical Earth",
DATUM["unknown",
SPHEROID["unnamed",6378137,0]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Equirectangular"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",0],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-20035281.952973376959562,10016527.781578756868839)
Pixel Size = (4452.779631730943038,-4452.779631730943038)
Metadata:
AREA_OR_POINT=Point
TIFFTAG_IMAGEDESCRIPTION=DATA_PLATFORM="noaa-17";DATA_NAME="ir";DATA_START_TIME="Wed, 12 Sep 2007 11:51:33 GMT";DATA_END_TIME="Wed, 12 Sep 2007 13:50:47 GMT";DATA_UNITS="celsius";DATA_RANGE="0,249,-100,0.60241,None";
TIFFTAG_SOFTWARE=TeraScan
TIFFTAG_DATETIME=2007/09/12 10:51:33
Corner Coordinates:
Upper Left (-20035281.953,10016527.782) (179d58'48.00"W, 89d58'48.00"N)
Lower Left (-20035281.953,-10020980.561) (179d58'48.00"W, 90d 1'12.00"S)
Upper Right (20039734.733,10016527.782) (179d58'48.00"W, 89d58'48.00"N)
Lower Right (20039734.733,-10020980.561) (179d58'48.00"W, 90d 1'12.00"S)
Center ( 2226.390, -2226.390) ( 0d 1'12.00"E, 0d 1'12.00"S)
Band 1 Block=9000x1 Type=Byte, ColorInterp=Palette
Color Table (RGB with 256 entries)
0: 255,255,255,255
1: 254,254,254,255
2: 254,254,254,255
3: 253,253,253,255
4: 253,253,253,255
5: 252,252,252,255
6: 252,252,252,255
7: 251,251,251,255
8: 251,251,251,255
9: 250,250,250,255
10: 250,250,250,255
11: 249,249,249,255
12: 249,249,249,255
13: 248,248,248,255
14: 248,248,248,255
15: 247,247,247,255
16: 247,247,247,255
17: 246,246,246,255
18: 246,246,246,255
19: 245,245,245,255
20: 245,245,245,255
21: 244,244,244,255
22: 243,243,243,255
23: 243,243,243,255
24: 242,242,242,255
25: 242,242,242,255
26: 241,241,241,255
27: 241,241,241,255
28: 240,240,240,255
29: 240,240,240,255
30: 239,239,239,255
...
225: 80,80,80,255
226: 78,78,78,255
227: 76,76,76,255
228: 75,75,75,255
229: 71,71,71,255
230: 69,69,69,255
231: 67,67,67,255
232: 65,65,65,255
233: 64,64,64,255
234: 61,61,61,255
235: 59,59,59,255
236: 57,57,57,255
237: 55,55,55,255
238: 53,53,53,255
239: 50,50,50,255
240: 48,48,48,255
241: 45,45,45,255
242: 42,42,42,255
243: 39,39,39,255
244: 35,35,35,255
245: 32,32,32,255
246: 27,27,27,255
247: 22,22,22,255
248: 16,16,16,255
249: 0,0,0,255
250: 255,255,255,255
251: 0,0,0,255
252: 255,255,0,255
253: 0,0,0,255
254: 0,0,0,255
255: 0,0,0,255
The SLD I'm using:
<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor xmlns="http://www.opengis.net/sld " xmlns:ogc="http://www.opengis.net/ogc " xmlns:xlink="http://www.w3.org/1999/xlink " xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance " xsi:schemaLocation="http://www.opengis.net/sld
http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd " version="1.0.0">
<UserLayer>
<Name>raster_layer</Name>
<LayerFeatureConstraints>
<FeatureTypeConstraint/>
</LayerFeatureConstraints>
<UserStyle>
<Name>raster</Name>
<Title>A boring default style</Title>
<Abstract>A sample style for rasters</Abstract>
<FeatureTypeStyle>
<FeatureTypeName>Feature</FeatureTypeName>
<Rule>
<RasterSymbolizer>
<Opacity>1.0</Opacity>
<OverlapBehavior>
<AVERAGE/>
</OverlapBehavior>
<ColorMap>
<ColorMapEntry color="#000000" quantity="-500" label="nodata" opacity="0.0"/>
<ColorMapEntry color="#00ff00" quantity="-500" label="values"/>
<ColorMapEntry color="#00fa00" quantity="-417" label="values"/>
<ColorMapEntry color="#14f500" quantity="-333" label="values"/>
<ColorMapEntry color="#28f502" quantity="-250" label="values"/>
<ColorMapEntry color="#3cf505" quantity="-167" label="values"/>
<ColorMapEntry color="#50f50a" quantity="-83" label="values"/>
<ColorMapEntry color="#64f014" quantity="-1" label="values"/>
<ColorMapEntry color="#7deb32" quantity="0" label="values"/>
<ColorMapEntry color="#78c818" quantity="30" label="values"/>
<ColorMapEntry color="#38840c" quantity="105" label="values"/>
<ColorMapEntry color="#2c4b04" quantity="300" label="values"/>
<ColorMapEntry color="#ffff00" quantity="400" label="values"/>
<ColorMapEntry color="#dcdc00" quantity="700" label="values"/>
<ColorMapEntry color="#b47800" quantity="1200" label="values"/>
<ColorMapEntry color="#c85000" quantity="1400" label="values"/>
<ColorMapEntry color="#be4100" quantity="1600" label="values"/>
<ColorMapEntry color="#963000" quantity="2000" label="values"/>
<ColorMapEntry color="#3c0200" quantity="3000" label="values"/>
<ColorMapEntry color="#ffffff" quantity="5000" label="values"/>
<ColorMapEntry color="#ffffff" quantity="13000" label="values"/>
</ColorMap>
<ShadedRelief/>
</RasterSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</UserLayer>
</StyledLayerDescriptor>
Thanks,
-Sam