[Proj] proj4 api issue converting between state plane and wgs84
Mikael.Rittri at carmenta.com
Fri Jun 8 04:32:48 EST 2012
According to http://trac.osgeo.org/proj/wiki/pj_transform ,
"geographic locations need to be passed in radians,
not decimal degrees, and will be returned similarly."
I haven't heard that this differs between the APIs.
> which gives output that looks like this:
> ... the longitude: -1.787841
> ... the latitude: 0.667755
> which definitely is not right.
Assuming these are in radians, multiplication by 180/pi gives
Longitude: -102.4357 (decimal degrees)
which is in Colorado, but quite near Kansas. I think you didn't
give the projected coordinates of the test point, so I can't
see if the radians-to-degrees conversion is all that is missing.
From: proj-bounces at lists.maptools.org [mailto:proj-bounces at lists.maptools.org] On Behalf Of jdb1a1
Sent: Tuesday, June 05, 2012 9:36 PM
To: proj at lists.maptools.org
Subject: Re: [Proj] proj4 api issue converting between state plane and wgs84
Well, I tested out the same code base in with a wrapper for c# in proj4 and
it works fine. I am going to process it on the server instead. If anybody
knows why this didn't work in the Proj4 C API, I would still love to know.
View this message in context: http://osgeo-org.1560.n6.nabble.com/proj4-api-issue-converting-between-state-plane-and-wgs84-tp4979285p4979307.html
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