[Proj] Define custom proj4 CRS

Andre Joost andre+joost at nurfuerspam.de
Thu Jan 31 15:09:05 EST 2013

Am 31.01.2013 19:53, schrieb Hermann Peifer:

> However, as Stephane mentioned: the units of IBGE's DGN files are in km,
> so one has to define a custom CRS with these parameters (same as above
> with the exception of +units=km)
> +proj=utm +zone=23 +south +ellps=intl +towgs84=-206,172,-6,0,0,0,0 +units=km

Reading a proj document from Frank Warmerdam of 2004, I found this hint:
+proj=utm +zone=23 +south +ellps=intl 
+towgs84=-0.206,0.172,-0.006,0,0,0,0 +to_meter=1000 +no_defs

which works perfectly in Qgis.

André Joost

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