An open source Java software library that provides an object model for Euclidean planar linear geometry together with a set of fundamental geometric function

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What is the best way to convert WKT String to GML String

What is the best way to programatically convert WKT String to GML String? Every reasonable library (at best available in some Maven repository) can be used. Till now I came up with this solution ...
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GeoTools and PostGIS with ESPG:3857

I'm trying to use both PostGIS and GeoTools with the same ESPG:3857 projection, however, it looks like the projections in PostGIS and GeoTools differ. This is what I have in PostGIS: PROJCS["WGS 84 ...
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1answer
352 views

combine several polygon objects in one polygon object with geotools (is it possible)?

I have several polygon objects and I need to "merge (or combine or dissolve)" them toghether into one polygon object. With a GIS tool like Quantum GIS, I do this with Geoprocessing option "Combine ...