[Proj] Portuguese Modified Grid - Datum 73
roger at opq.se
Thu Feb 18 10:40:14 EST 2010
On Thu, 2010-02-18 at 13:24 +0000, Jose Gonçalves wrote:
> Sorry, it was my mistake: it is in fact 39d40'. I edited the value in
> the epsg file, to convert decimal degrees to DMS, and made the
> mistake... The epsg file is ok.
> Some history about that projection: that central point was chosen at a
> mid latitude of the country and 1d00'00"E of the Lisbon Meridian
> (9d07'54.862"W). The small false easting/northing of a few hundred
> meters, which is quite unusual, was chosen in order to create
> projected coordinates similar to projected coordinates in an older
> datum (datum Lisboa).
I suspected the false values were for some such thing.
And I am glad about the 39d40'. Otherwise I would really have been
Thanks all for the help.
OPQ Systems / Ramböll RST
Ramböll Sverige AB
P.O. Box 17009
SE-104 62 Stockholm, Sweden
Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696
More information about the Proj