I am attempting to determine the size of a point symbol based on scale using a
custom function. However, the first test of scale (if scale >= 500000:) always
evaluates to true. I have chosen the scales for the script based on the fact
that my base layer in an OL3 app is an OpenLayers.Layer.ArcGISCache with the
following config http://maps.nyc.gov/gis/data/tiles/conf.xml
FUNCTION (iconSize.py):
def run(value, args):
scale = args[0]
if scale >= 500000:
return 20
elif scale >= 350000:
return 22
elif scale >= 256000:
return 24
elif scale >= 128000:
return 26
elif scale >= 64000:
return 28
elif scale >= 32000:
return 30
elif scale >= 16000:
return 32
elif scale >= 8000:
return 34
elif scale >= 4000:
return 36
elif scale >= 2000:
return 38
else:
return 40
SLD:
<?xml version="1.0" encoding="UTF-8"?>
<sld:UserStyle xmlns="http://www.opengis.net/sld";
xmlns:sld="http://www.opengis.net/sld";
xmlns:ogc="http://www.opengis.net/ogc";
xmlns:gml="http://www.opengis.net/gml";>
<sld:Name>Default Styler</sld:Name>
<sld:FeatureTypeStyle>
<sld:Name>name</sld:Name>
<sld:Rule>
<sld:PointSymbolizer>
<sld:Graphic>
<sld:ExternalGraphic>
<sld:OnlineResource
xmlns:xlink="http://www.w3.org/1999/xlink"; xlink:type="simple"
xlink:href="http://localhost:82/geoserver/styles/mapIcons/Recovery.svg"/>
<sld:Format>image/svg+xml</sld:Format>
</sld:ExternalGraphic>
<sld:Size>
<ogc:Function name="iconSize">
<ogc:Function name="env">
<ogc:Literal>wms_scale_denominator</ogc:Literal>
</ogc:Function>
</ogc:Function>
</sld:Size>
</sld:Graphic>
</sld:PointSymbolizer>
</sld:Rule>
</sld:FeatureTypeStyle>
</sld:UserStyle>
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