Обсуждение: what the meaning of overlap for polygon ?

hi,

after my precedent message i've began to develop a polygon support for
postgres based on a "non free for commercial use" library :

http://www.cs.man.ac.uk/aig/staff/alan/software/index.html

but i'm wondering something about  overlap : what does it mean ?

it is the same meaning than intersect.. or is there a difference ?

Pierre-Yves Landuré

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