[Proj] Roussilhe Projection

Frank Warmerdam warmerdam at pobox.com
Fri Oct 21 09:08:33 EDT 2005

On 21 Oct 2005 13:19:55 +0200, Maciek Sieczka <werchowyna at epf.pl> wrote:
> They, and you, are not wrong. I, and espg 2171, are wrong.  Good you have noticed it. I made a mistake following the epsg blindly here. Frank, Gerald, could you please fix that in your epsg 2171 definitions for y_0? y_0 should be 5467000, like Oscar and his sources say.


The best solution would be to download the latest EPSG database,
and see if it has been corrected there.  If not, submit a change
request to the EPSG.  If so, just hassle me to refresh the epsg
definition file from the latest EPSG file.

> BTW, can anybody please say how to extend the accuracy of cs2cs output beyond 2 decimal points, so I could properly compare Oscar results to Proj's sterea implementation also?

As per the man page at:


Use the -f argument to change output formatting.

For instance:

cs2cs -f "%.5f" +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84
-118 33
406582.22179    3651730.97411 0.00000

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

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