[Proj] Datum conversion

Anthony Dunk AnthonyD at rocketmail.com
Wed Jul 5 20:32:30 EDT 2006

The SAD69 datum is not directly supported so you just have to provide
the ellipsoid parameters and the "towgs84" conversion values.

The following command will convert from lat/lon WGS74 to lat/lon SAD69:

cs2cs +proj=latlong +datum=WGS84 +to +proj=latlong +a=6378160.0
+rf=298.25 +towgs84=-57,1.0,-41


--- "Hyer, Dr. Edward (Post Doc)" <edward.hyer at nrlmry.navy.mil> wrote:

> Hi,
> I am interested in doing point coordinate conversions from WGS84
> lat/long points to SAD69. The SAD69 datum does not appear to be
> natively supported in proj or cs2cs. Can someone tell me where to
> find the parameters to use for this conversion?
> Thanks for your help,
> Dr. Edward J. Hyer
> Post-Doctoral Researcher
> Naval Research Laboratory
> Marine Meteorology Division
> 7 Grace Hopper Avenue, Stop 2
> Monterey, California 93940
> 831-656-4023
> FAX 831-656-4769
> edward.hyer at nrlmry.navy.mil
> _______________________________________________
> Proj mailing list
> Proj at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/proj

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