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Revision 13816

schemas/util.sql: bounding_box(): documented that the geography type stores all edges as arcs of great circles, resulting in the latitude lines bulging outward from the true bounding box. this will create false positives above and below the bounding box.

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trunk/schemas/util.sql
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usage:
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SET search_path = util; -- for ~ operator
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SELECT util.bounding_box(lower_lat ~ upper_lat, lower_long ~ upper_long);
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**WARNING**: the geography type stores all edges as arcs of great circles,
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resulting in the latitude lines bulging outward from the true bounding box.
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this will create false positives above and below the bounding box.
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';
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