[GRASS5] Re: Helping creating a Portuguese location in GRASS

Markus Neteler neteler at itc.it
Thu Apr 10 10:06:39 EDT 2003

(cc grass5)

Here a forwarded question which reached me recently for the
projection experts.


On Tue, Apr 08, 2003 at 12:39:10PM +0100, Miguel Repas wrote:
> Dear Markus,
> My appologies for reaching personally with this question. I have been
> searching for a solution to my problem in the grass site, the discussion
> list and in your book but without success. I am new to GRASS and I am
> struggling to getting my data on it. I sincerely hope you could help me
> on this.
> My data is in the so-called portuguese military system. It is defined as
> a gauss kruger projection, international (hayford) elipsoid. The
> coordinates are rectangular with a central point at Melrica (most of my
> data has a false easting of 200km and a false northing of 300km). Lisbon
> datum. I need to import this data to grass and later to put it in a new
> UTM ED50 location.
> I have recently found this string which I believe specifies the
> parameters for my data:
> PROJCS["Portuguese_National_Grid",GEOGCS["GCS_Lisbon_Lisbon",DATUM["D_Li
> sbon",SPHEROID["International_1924",6378388,297]],PRIMEM["Lisbon",-9.131
> 906111111112],UNIT["Degree",0.017453292519943295]],PROJECTION["Transvers
> e_Mercator"],PARAMETER["False_Easting",200000],PARAMETER["False_Northing
> ",300000],PARAMETER["Central_Meridian",1],PARAMETER["Scale_Factor",1],PA
> RAMETER["Latitude_Of_Origin",39.66666666666666],UNIT["Meter",1]] 
> How can I create a location based on these parameters?
> Can I later project this data to UTM ED50 within grass? How?
> I most sincerly appreciate your help.
>  Cheers
> Miguel Repas

More information about the grass-dev mailing list