Vinícius Rodrigues,  Marcus Andrade,  Gilberto Queiroz,  Mirella Magalhães. 

This paper describes the implementation of a more efficient method to overlay two maps using the TerraLib library. As shown by some tests, this method is much more efficient than the original method and this fact is more evident when more complex maps are used.

http://www.geoinfo.info/geoinfo2006/papers/p35.pdf

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