| From: | Asli Akarsakarya <asliakar(at)yahoo(dot)com> |
|---|---|
| To: | Filip Rembiałkowski <plk(dot)zuber(at)gmail(dot)com> |
| Cc: | "\"pgsql-sql(at)postgresql(dot)org\"" <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: a spatial table's bounding box |
| Date: | 2011-10-04 18:22:19 |
| Message-ID: | 1317752539.52809.YahooMailNeo@web45104.mail.sp1.yahoo.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-sql |
Thank you very much.
>I would try >SELECT st_envelope( st_collect(geom) ) FROM roads; >HTH, Filip>> I want to get the extensions of spatial table. Say that there is a spatial table named 'roads', and a some road geometry inside. I want to fetch the bounding box (envelope or extension) for that table, that means for all the roads that it has.>>
>> According the OGC specification, this should be defined in the "geometry_columns" table. As four columns, "minX", "minY", "maxX" and "maxY". But I couldn't find it anywhere on my postgis. Yet.
>>
>> From which table/view? With what SQL?
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