[postgis-users] What's the Purpose of the Geometry_Columns Table?

[TECHER David]

U're right! ;-)

Emilia Venturato a écrit :

>Alle 15:14, martedì 5 settembre 2006, Bill Thoen ha probabilmente scritto:
>  
>
>>I created a table using a 'SELECT * INTO ...' statement which contained a
>>geometry column, and then I performed a few more spatial selections on it
>>without problems. Later I realized that the geometry column in my new table
>>wasn't referenced in the Geometry_Columns, but it didn't seem to matter. So
>>what is the purpose of the Geometry_Columns table?
>>_______________________________________________
>>postgis-users mailing list
>>postgis-users at postgis.refractions.net
>>http://postgis.refractions.net/mailman/listinfo/postgis-users
>>    
>>
>
>
>Geometry_columns is a table (OGC standard) that allows other apps  (Mapserver, 
>QuantumGIS, ecc.) to use postgis data. All standard OGC applications looks at 
>geometry_columns to have a complete overview of geographic data in your 
>database.
>If you work only in postgis, you can forget about geometry_columns but you'll 
>find problems when you will use your data from other applications (mapserver 
>for example doesn't show geographical data if geometry_columns is not 
>correct).
>
>At least, that's how I understand it.
>bye
>Lia
>
>
>  
>

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