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<p>Hi there,</p>
<p>I am not actually a POSTGIS user, or developer, although I am
doing some research of integration of vector -raster in a dbms
context. My main question s about identifying regions represented
in a domain like the "hybrid raster" so that they can be referred
to in a query. For example, I would like to write something like "<i><b>select
d from districts where d.geometry touches flooding</b></i>",
where "flooding" indicates an expression intended to decide on the
pertinence of locations to a flooding risk area described, for
instance through map algebra.</p>
<p>Thanks for any hints or suggestions.</p>
<p>Att.<br>
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