[STATSGRASS] Proj4

[Roger Bivand]

On Thu, 23 Oct 2003, Torben Bach wrote:

> Hi
> 
> Completely new to the subject I have been roaming the internet trying to
> find a "golden" command line to proj4 for converting lat-lon coordinates
> to DANISH ED50 UTM zone 32N. Apparently the internal ED50 is not the
> same as the Danish (or german or french...) ED50 - im am confused - does
> anybody know the "golden" command line I so badly long for ? 

Maybe ask on the proj list? Does the inverse transformation on 
http://www.kms.dk/research/geodesy/reference/cotrans1_en.html
help?

> 
> Another question - how accurate is the ouput from Proj4 ? I have
> compared results converting to EUREF89 with output from programs from
> the national Ministry of the Environment (KMS) handling this stuf and
> MapInfo, and they gave the same result within a meter or so. But using
> ED50 and Proj4 gave coordinates lying hundreds of meters from MapInfo
> and "official" KMS  results (this was how I discoverd I needed the
> "golden" command line).
> 
> Thanks in advance !!
> 
> Best regards,
> 
> -Torben Bach
> 
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no