[postgis-users] geom null

[Chris Hermansen]

Then if you can't add to a null geometry, you will probably be forced to
digitize your places into another table and join the two after the data
entry phase.

Which means you will need identifiers on the geometry sub table that can
be linked 1-1 with identifiers on the attribute sub table.

You can use a correlated subquery to find rows in the geometry sub table
that do not connect with the attribute sub table.

ju wrote:
> thanks but my table contains data for 1500 geographical place we are
> going to digitize
> some will be point, other line and other polygon
> so i can not make a false object and then modify it.
>
>
> Chris Hermansen a écrit :
>> Interesting question.  What if, instead of null, you put in a simple
>> piece of geometry that you can modify?  (a point or a line or a
>> 3-point linestring or a rectangle)?
>>
>> ju wrote:
>>> Hi list,
>>> i have imported a table in postgres with only data fields.
>>> i add a geom field and i would like to digize object, for example
>>> with Qgis or GV sig.
>>> my table record is visible in qgis or gv sig but impossible to
>>> digitize...
>>> i think the trouble is not qgis or gvsig but a trouble of concept :
>>> is it possible to digitize a geom in postgis table if the record (
>>> with geom null) allready exist ?
>>>
>>> thanks for helping,
>>>
>>>
>>> _______________________________________________
>>> postgis-users mailing list
>>> postgis-users at postgis.refractions.net
>>> http://postgis.refractions.net/mailman/listinfo/postgis-users
>>
>>
>


-- 
Regards,

Chris Hermansen         mailto:chris.hermansen at timberline.ca
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