On Mon, Feb 1, 2016 at 11:41 PM, Little, John (NRCan/RNCan) <
john.little@anonymised.com> wrote:
My SLD works!, However, my problem/question is… the geotiff contains null
values at the outter extents of the grid, outside of the area of interest.
I believe these null cell’s do in fact contain a value of
-3.4028234663853e+038. I’m wondering how (and where) would I apply this
filter to ensure these arrows are not drawn on the map?
See below
Here is my SLD:
<StyledLayerDescriptor version="1.0.0"
xmlns="http://www.opengis.net/sld" xmlns:gml="http://www.opengis.net/gml"
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
./StyledLayerDescriptor.xsd">
<NamedLayer>
<Name>Wind</Name>
<UserStyle>
<Title>Wind</Title>
<FeatureTypeStyle>
<Transformation>
<ogc:Function name="ras:RasterAsPointCollection">
<ogc:Function name="parameter">
<ogc:Literal>data</ogc:Literal>
</ogc:Function>
<!-- Activate the logic to recognize the emisphere -->
<ogc:Function name="parameter">
<ogc:Literal>emisphere</ogc:Literal>
<ogc:Literal>True</ogc:Literal>
</ogc:Function>
<ogc:Function name="parameter">
<ogc:Literal>interpolation</ogc:Literal>
<ogc:Literal>InterpolationBilinear</ogc:Literal>
</ogc:Function>
<ogc:Function name="parameter">
<ogc:Literal>scale</ogc:Literal>
<ogc:Function name="Categorize">
<ogc:Function name="env">
<ogc:Literal>wms_scale_denominator</ogc:Literal>
</ogc:Function>
<!-- this will generalize arrows -->
<ogc:Literal>8</ogc:Literal>
<ogc:Literal>50000</ogc:Literal>
<ogc:Literal>4</ogc:Literal>
<ogc:Literal>100000</ogc:Literal>
<ogc:Literal>2</ogc:Literal>
<ogc:Literal>500000</ogc:Literal>
<ogc:Literal>1</ogc:Literal>
<ogc:Literal>1000000</ogc:Literal>
<ogc:Literal>0.2</ogc:Literal>
<ogc:Literal>5000000</ogc:Literal>
<ogc:Literal>0.1</ogc:Literal>
<ogc:Literal>10000000</ogc:Literal>
<ogc:Literal>0.05</ogc:Literal>
<ogc:Literal>20000000</ogc:Literal>
<ogc:Literal>0.02</ogc:Literal>
</ogc:Function>
</ogc:Function>
</ogc:Function>
</Transformation>
<Rule>
You should add the filter right here, working against the WDIR property,
something like the folowing
(warning, untested):
<ogc:Filter>
<ogc:PropertyIsGreaterThan>
<ogc:PropertyName>WDIR</ogc:PropertyName>
<ogc:Literal>-360</ogc:Literal>
</ogc:PropertyIsGreaterThan>
</ogc:Filter>
<PointSymbolizer>
<Graphic>
<Mark>
<!--<WellKnownName>windbarbs://default</WellKnownName>-->
<WellKnownName>extshape://sarrow</WellKnownName>
<Fill>
<CssParameter name="fill">#000000</CssParameter>
</Fill>
<Stroke>
<CssParameter name="stroke">#000000</CssParameter>
<CssParameter name="stroke-width">0.2</CssParameter>
</Stroke>
</Mark>
<Size>12</Size>
<Rotation>
<ogc:PropertyName>WDIR</ogc:PropertyName>
</Rotation>
</Graphic>
</PointSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
</StyledLayerDescriptor>
Hope this helps
Cheers
Andrea
--
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Ing. Andrea Aime
@geowolf
Technical Lead
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