[Proj] Define custom proj4 CRS
Andre Joost
andre+joost at nurfuerspam.de
Thu Jan 31 14:58:11 EST 2013
Am 31.01.2013 19:53, schrieb Hermann Peifer:
>
> Dear both,
>
> I just came to the same conclusion that EPSG:22523 would be the most
> appropriate CRS.
Me too, and it is in the standard database.
>
> 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
I tried that, but QGIS does not like it:
Ausdehnung:
In Bezugssystemeinheiten des Projekts : xMin,yMin 448.11;7345.03 :
xMax,yMax 475.53;7374.02
Räumliches Bezugssystem des Layers:
+proj=utm +zone=23 +south +ellps=intl +towgs84=-206,172,-6,0,0,0,0
+units=m +no_defs
having set this custom CRS:
+proj=utm +zone=23 +south +ellps=intl +towgs84=-206,172,-6,0,0,0,0
+units=km +no_defs
Maybe the elliposid and towgs84 parametres must also be in kilometres then?
> On 2013-01-31 16:03, Jose Gonçalves wrote:
>> PS: The IBGE ftp site seems to be off.
No, not off, but very slow: 6 to 9 kb/sec. Took me 2 hours to download
51MB...
Greetings,
André Joost
More information about the Proj
mailing list