Getting cell witdth and height from excel with Apache POI

Geoserver sld Filter functions
• The concept of filter function is part of the OGC Filter spec. A filter function is an expression with a name and a set of arguments
• GeoServer has hundreds built-in:
http://docs.geoserver.org/stable/en/user/filter/function_reference.html#filter-function-reference


For example:
If we want to draw each point in line geometry.

<Rule>
<PolygonSymbolizer>
    <Stroke>
        <CssParameter name="stroke">#000000</CssParameter>
        <CssParameter name="stroke-width">1</CssParameter>
    </Stroke>
</PolygonSymbolizer>
</Rule>
<Rule>
    <PointSymbolizer>
        <Geometry>
            <ogc:Function name="vertices">
                <ogc:PropertyName>GEOM</ogc:PropertyName>
            </ogc:Function>
        </Geometry>
        <Graphic>
            <Mark>
                <WellKnownName>circle</WellKnownName>
                <Fill>
                    <CssParameter name="fill">#ff0000</CssParameter>
                </Fill>
            </Mark>
            <Size>6</Size>
        </Graphic>
    </PointSymbolizer>
</Rule>

And result is this :