[postgis-users] ST_CoveredBy supporting geography?

[Nick Bower]

Thanks but not according to the doc I think?
1) Abstract superclass is mentioned in API, not point,
2) the SQL example uses circles
3) the blog link specifically uses polygons in it's discussion of OGC  
coverage behaviour.

http://postgis.refractions.net/documentation/manual-1.5/ST_CoveredBy.html

I'm not disputing your explanation given the evidence, but suggest the  
docs are entirely misleading for me figuring out if one polygon  
geography is wholey inside another.


On 11/05/2010, at 11:48 PM, Paul Ramsey <pramsey at opengeo.org> wrote:

> Bad sentence construction in the error, perhaps? The restriction "only
> polygon and point" means that one argument must be a polygon and one
> must be a point. Both your arguments are polygons.
>
> P.
>
> On Tue, May 11, 2010 at 4:51 AM, Nicholas Bower <nick at petangent.net>  
> wrote:
>> I've read the 1.5 reference docs but can't figure out what is wrong  
>> with
>> below.  ST_CoveredBy(geography, geography) should work right?
>>   select count(*) from t_swath_metadata where ST_CoveredBy(
>>  ST_GeogFromText('SRID=4326;POLYGON((123.1773295292851  
>> -16.07501950971949,
>>                           122.745660066063 -16.83965661151543,
>>                           124.1310486688905 -16.44978157737539,
>>                           123.1773295292851 -16.07501950971949))'),
>> swath_bounding);
>> ERROR:  geography_covers: only POLYGON and POINT types are currently
>> supported
>> CONTEXT:  SQL function "st_covers" statement 1
>> ********** Error **********
>> ERROR: geography_covers: only POLYGON and POINT types are currently
>> supported
>> SQL state: XX000
>> Context: SQL function "st_covers" statement 1
>>
>> db=> \d t_swath_metadata;
>> ...
>>  swath_bounding        | geography(Polygon,4326)     |
>> Indexes:
>>     ...
>>     "t_swath_metadata_swath_bounding_key" gist (swath_bounding)
>>
>> Thanks, Nick
>>
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