[Proj] a simple coordinate conversion problem

[Mikael Rittri]

Martin,
I am sorry, but the best you can do is to ask the data provider, not us. 

However, if the data is meteorological, I am pretty sure that
you should do nothing at all to convert to WGS84 long/lat. 

For other kinds of data, some transformation may be needed,
perhaps converting from geocentric to geodetic latitude. But
only your own data provider can tell you what you must do. 

Regards

Mikael Rittri
Carmenta
Sweden
http://www.carmenta.com

13 aug 2012 kl. 21:38 skrev "Martin Ivanov" <martin.ivanov at ifg.uni-tuebingen.de>:

> Dear users of PROJ,
> 
> I have a data set on a perfect sphere with radius 6371 km. The "projection"
> is latitude-longitude, so the data practically are unprojected.
> 
> I need to transform the coordinates of the points in my data set from the sphere
> to WGS84. For that purpose I need the +towgs84 parameters for my sphere, which I
> do not know. Does someone have a clue how to get these parameters?
> 
> Any suggestions will be appreciated.
> 
> Best regards,
> 
> Martin
> 
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