[postgis] SRID

[Dave Blasby]

> but while I'm here...can anyone help a novice and explain the
> purposed of the srid field...

SRID means "Spatial Reference ID".  Its a tag that says the geometry is
in a particular map project (ie. UTM Zone 10, Albers, or Lat/Long NAD
83).

You should add a row to the spatial_ref_sys table for each SRID you have
in your system.

dave

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