projections in GRASS

[Admin. scarab J.M. ROQUES 5322]

Hola Vincente,

Aqui viene una responsa a lo que preguntes.
Fue "mailada" ayer, desde belgica por algo similar. era en mi correo esta manan
a.
Hasta la proxima vez
JM Roques


> As Grass is not transformable from f.i Non-projected data to Lambert
> Conic projection I am a bit afraid you will need to combine own written
> programs with the Grass tools for image processing. i.points and i.rectify
>
> I had a basically identical situation to transform my data to the Belgian
> Lambert projection.
> I wrote a program that allowded me to calculate points from one system to
> another. This you should be able to get from a local geographic institute
> or at least you would need to have the refernce points and meridian.
> After having written this you should do the following.
>
> Make a group with i.group so in this way grass creates the subdirectory
> group and a subdir with the name of the group. Normally using i.points or
> i.vpoints you create a file POINTS. You can skip the module i.points and
> create the file POINTS yourself with your calculated data. Then just run
> i.rectify. Be sure that you have good distributed points over the area.
> It should work but it will take time to develop your own transformations!
>
>                       Bart
>
>
>       ---------------------------------------------------     
>       | ir. Bart Cosyn                                  |
>       | ERS1/2 project                                  |
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