I have geography data stored in SQL Server and I am trying to merge polygons from two data sets together. The problem is that they do not line up exactly, so unioning them results in narrow gaps along the boundaries between the two sets. What's the easiest way to removed these seams? I am currently doing this in SQL Server, so if I could do this with tools SQL Server provides, that would be ideal. Otherwise I'm open to using another, preferably free tool.
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