[postgis-devel] [PostGIS] #231: New distance-calculations proposal
PostGIS
trac at osgeo.org
Sun Oct 18 22:53:49 PDT 2009
#231: New distance-calculations proposal
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Reporter: nicklas | Owner: robe
Type: enhancement | Status: assigned
Priority: medium | Milestone: postgis 1.5.0
Component: postgis | Version:
Resolution: | Keywords:
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Comment (by robe):
Interesting SQL Server also agrees with our original distance calculation.
I was really expecting the last set of digits to be different just because
I assume their algorithm most be slightly differnt. Hmm -- I really
should get my Oracle box up. I thought these things would be different in
the last digits unless everyone in the world has decided on a standard way
of calculating these things.
SELECT Geometry::STGeomFromText('POINT(774983.955351382
2949487.72566304)',2249).STDistance(Geometry::STGeomFromText('LINESTRING(775212.698335966
2948028.5564237,775121.04258857 2950068.84568561)',2249));
Gives:
163.028426002135
But Like you said nicklas -- those numbers at the end are kind of
irrelevant. I'm not up with IEEE stuff so can't comment on what either of
you are saying.
--
Ticket URL: <http://trac.osgeo.org/postgis/ticket/231#comment:20>
PostGIS <http://trac.osgeo.org/postgis/>
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