You're thinking in straight lines, not great circles. Here's what your "box" actually looks like
http://www.gcmap.com/mapui?P=10N+170E-10N+0E%2C%0D%0A10N+170E-5N+170E%2C%0D%0A5N+170E-5N+0E%2C%0D%0A5N+0E-10N+0E&MS=wls&DU=mi I can see how that could hit your Russian foot print. P. On Mon, Jun 13, 2011 at 6:54 AM, Mahesh Ghule <[email protected]> wrote: > Hello Guys, > After lot of head scratching I have decided to post this email. > We have a PostGIS 1.5.1 on PostgreSQL 8.4 > select > ST_AsText('0105000020E6100000010000000102000000020000009FAEEE586C8C5240029CDEC5FBF94D406B44300E2EDB5140D591239D81D14C40'::geography) > as TextFootPrint, > > ST_Intersects('0105000020E6100000010000000102000000020000009FAEEE586C8C5240029CDEC5FBF94D406B44300E2EDB5140D591239D81D14C40'::geography, > ST_GeographyFromText('POLYGON((0 10,170 10,170 5,0 5,0 10))')) as > Intersects; > yields following result > TextFootPrint > | Intersects > ------------------------------------------------------------------------------------------------------------------- > MULTILINESTRING((74.194113 59.952996,71.424686 57.636768)) | t > > Which as I understand is not correct. The footprint is a line string > somewhere over Russia and the Polygon is a band in north hemisphere just > above equator. > Also when I visualise the both geographies as KML in google earth I can see > them thousands of miles apart. > This is just one example footprint where I have tens of thousand more in my > DB like this. > Please help me understand what is going on? > > Regards, > Mahesh > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > > _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
