[Proj] lat/long to northing/easting and back again

[support.mn at elisanet.fi]

Hello,

how about using pj_inv() in the proj.4 library?

regards: Janne.

-------------------------------------------------

Roger Oberholtzer [roger at opq.se] kirjoitti: 
> Gee, no opinions/suggestions? Especially on the best way to convert
> northings/eastings back into wgs84?
> 
> On Tue, 2009-03-03 at 07:56 +0100, Roger Oberholtzer wrote:
> > I have always used proj to convert WGS84 lat/long values to
> > northing/easting values in various parts of the world. In doing so, I
> > usually need to interpolate between points to find specific locations.
> > These interpolated locations have always been reported as
> > northing/easting values in meters. Job finished.
> > 
> > I now have a use where, after determining the interpolated
> > northing/easting, I need to convert the location back into lat/long in
> > degrees. This I have never done with proj.
> > 
> > My question is, if you had to locate a position between two lat/long
> > values, how would you best do this with proj? The source data in my case
> > is WGS84 values from a Trimble GPS. The 'interpolated' lat/longs should
> > also be reported in WGS84. In reality, the values will be collected
> > throughout Germany. But everything is requested to be provided in WGS84.
> > 
> > I use the C API for this. But any pointers are welcome. If I have left
> > out any important detail, just ask.
> > 
> > 
> > -- 
> > Roger Oberholtzer
> > 
> > OPQ Systems / Ramböll RST
> > 
> > Ramböll Sverige AB
> > Krukmakargatan 21
> > P.O. Box 17009
> > SE-104 62 Stockholm, Sweden
> > 
> > Office: Int +46 8-615 60 20
> > Mobile: Int +46 70-815 1696
> > 
> > _______________________________________________
> > Proj mailing list
> > Proj at lists.maptools.org
> > http://lists.maptools.org/mailman/listinfo/proj
> -- 
> Roger Oberholtzer
> 
> OPQ Systems / Ramböll RST
> 
> Ramböll Sverige AB
> Krukmakargatan 21
> P.O. Box 17009
> SE-104 62 Stockholm, Sweden
> 
> Office: Int +46 8-615 60 20
> Mobile: Int +46 70-815 1696
> 
> _______________________________________________
> Proj mailing list
> Proj at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/proj