what the meaning of overlap for polygon ?

From: Pierre-Yves Landuré <landure(at)yahoo(dot)fr>
To: PostgreSQL General Mailing List <pgsql-general(at)postgresql(dot)org>
Subject: what the meaning of overlap for polygon ?
Date: 2002-07-22 12:02:04
Message-ID: 1027339325.5134.7.camel@datacer
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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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