[postgis-users] transform - update lakesetthe_geom=transform(the_geom, 26971)
robe.dnd at cityofboston.gov
Fri Oct 10 08:32:55 PDT 2008
Try OpenJump. Its much easier for doing ad-hoc spatial queries than
Quantum when you need to see the geometry.
Quantum is nice too, but my experience is that its not as good for
Ad-Hoc Queries - but nice when you want to pick a table and so forth
and its easier to explain to users scared of SQL. You don't seem to
have that timidity :)
Hope that helps,
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of
cyw at dls.net
Sent: Friday, October 10, 2008 11:22 AM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] transform - update
Thanks to all.
The problem in my case was that I relied on PgAdmin doing my SQL queries
it does not display certain fields if they are too long.
----- Original Message -----
From: "Nicolas Ribot" <nicky666 at gmail.com>
To: "PostGIS Users Discussion" <postgis-users at postgis.refractions.net>
Sent: Friday, October 10, 2008 10:00 AM
Subject: Re: [postgis-users] transform - update lake
>> I have a table city which contains Multipolygons (SRID=4326) in
>> longitude. To project it to a plane coordinate (SRID=26971), I did:
>> update lake set the_geom=transform(the_geom, 26971);
>> It ran without any error. But some of the resulted values in the_geom
>> became null or empty.
>> Any hitnts why it did this?
>> Before the transformation, I viewed the table with QuantumGIS, it
>> Afterwards, QuantumGIS showed nothing.
> Verify that your input table has longitude-latitude values as X-Y
> coordinate, not the contrary.
> Also, if some input data fall outside of the range of acceptable
> values for the 26971 projection, these data won't be transformed =>
> null values.
> postgis-users mailing list
> postgis-users at postgis.refractions.net
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