[GRASSLIST:1094] Re: Conversion Transvers Mercator Shape File to LL Shape File

[Markus Neteler]

Hi Michael,

On Tue, Nov 07, 2000 at 07:30:05PM +0100, m.malicky at landesmuseum-linz.ac.at wrote:
> On 6 Nov 00, at 19:02, Markus Neteler wrote:
> > On Mon, Nov 06, 2000 at 05:45:55PM +0100, m.malicky at landesmuseum-linz.ac.at wrote:
> > > 
> > > How does one convert a transvers mercator (gauss krüger) shape 
> > > file to a lat-long shape file.
[...]
> thanks for the help!
> this has worked so far :-), but there are still problems:
> the long_0 for my gauß krüger file is 13°20'E
> the lat_0 is 45°N
-> are you sure about 45°N? In German Gauß-Krüger-System it is 0N.

> the e-w range within gauß krüger is -51300 to 121667
> the s-n range is 251470 to 397311
Please send your full coordinates.

I used m.proj like this:

Please specify projection name
>tmerc

Initializing INPUT projection ELLIPSOID:
>bessel

  Enter INPUT Central Parallel [lat_0] (23N) : 0N 
  Enter INPUT Central Meridian [lon_0] (96W) : 13:20E
  Enter INPUT False Easting [x_0] (0.000000) : 4500000
  Enter plural for INPUT units [meters]: 

Initializing OUTPUT PROJECTION:
>ll

Now the full coordinates would have to be entered.

Note: You enter decimal degree like 12.7639N and sexagesimal degree 
like 12:45:50N.

GRASS is accepting both.

So, if you send the full coordinates, I will check how to convert
them.

Regards

 Markus Neteler