I have a postgis table with polygon geometries.
I would like to create an sld which first does an inside buffer, and then a difference between the buffer and the original geometry.
This is basically like cutting a hole out of the polygon....ie first buffer (say...50 meters) and then cut this buffered polygon out of the original polygon.
I can´t seem to get my head around the syntax of using the sld filter explained here
<Intersects> <PropertyName>GEOMETRY</PropertyName> <Literal> <gml:Point> <gml:coordinates>1 1</gml:coordinates> </gml:Point> </Literal> </Intersects>
This is an intersect function which only displays the points which intersect 1,1. I guess a DIFFERENCE function with a buffer would have to be somehow nested...but I don´t know if this is possible.
If anyone can help. i´d be really grateful,