From: | Piotr Stelmaszyk <kelman(at)fanthom(dot)math(dot)put(dot)poznan(dot)pl> |
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To: | PgSQL-general <pgsql-general(at)postgresql(dot)org> |
Subject: | Re[2]: [GENERAL] geometric functions |
Date: | 1999-05-28 14:41:25 |
Message-ID: | 17695.990528@fanthom.math.put.poznan.pl |
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Lists: | pgsql-general |
Thursday, May 27, 1999, 10:29:24 PM, you write:
smag> It appears to me that the only function you need is the one that
smag> computes a bounding box of a polygon, returning it as the box
smag> type. Then use whatever geometric operators are available for the
smag> boxes. You can do the same with points, in which case you need a
smag> function that returns a box whose corners coincide with the point.
Consider big river (half circle) and a map-view-box inside it. This river
shouldn't be fetched from database... (but thank You for suggestions)
Piotr
/--------------------------------------------------------/
/- Piotr Stelmaszyk |---- Student of Computer Science ---/
/------------------ | at Poznan University of Technology /
/----- mailto:kelman(at)fanthom(dot)math(dot)put(dot)poznan(dot)pl ---------/
/----- mailto:kelman(at)alpha(dot)net(dot)pl -----------------------/
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