[postgis-users] TRANSFORM failures with some multiploygons - data sample attached

[Paul Ramsey]

I'm not seeing this problem on your polygon. What does

select postgis_full_version()

say?

On Thu, Oct 9, 2008 at 7:56 PM,  <cyw at dls.net> wrote:
> Hi All,
>
> In debugging the problem below, I found that TRANSFORM would fail with some
> of my city multipolygons.
>
> I would think that the TRANSFORM function should be independent of the shape
> or complexity of the polygons or lines.
>
> Attached is one of the city multipolygons that failed the TRANSFORM
> function.
>
> Thanks,
> CYW
>
>
> ----- Original Message ----- From: <cyw at dls.net>
> To: "PostGIS Users Discussion" <postgis-users at postgis.refractions.net>
> Sent: Thursday, October 09, 2008 8:13 PM
> Subject: [postgis-users] transform - update lake
> setthe_geom=transform(the_geom, 26971)
>
>
>> I have a table city which contains Multipolygons (SRID=4326) in latitude
>> and 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
>> column became null or empty.
>>
>> Any hitnts why it did this?
>>
>> Before the transformation, I viewed the table with QuantumGIS, it looked
>> OK. Afterwards, QuantumGIS showed nothing.
>>
>> Thanks,
>> CYW
>>
>>
>>
>>
>> _______________________________________________
>> postgis-users mailing list
>> postgis-users at postgis.refractions.net
>> http://postgis.refractions.net/mailman/listinfo/postgis-users
>>
>
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users
>
>