[GRASS-user] Raster equivalent to v.transform

[Nick Cahill]

Dear Moritz and all,

Thank you for your suggestion; this is possible, but now I wonder if there's a more general solution. With those transformation parameters, could I define the placement of my xy location, and then use r.proj and similar tools to do the transformations of both raster and vectors between the two locations? It would make my life a whole lot easier. 

Many thanks,

Nick




On May 9, 2012, at 4:32 AM, Moritz Lennert wrote:

> On 08/05/12 19:28, Nick Cahill wrote:
>> I am forced to work in two locations, a local xy grid and a UTM
>> location. I've worked out a simple appropriate transformation
>> (rotation and displacement) to get vectors in the xy location into
>> the UTM location, and vice versa. But there isn't an equivalent for
>> rasters. Is there an easy way to reproject rasters from UTM into an
>> arbitrary but known xy location? Many thanks,
> 
> Using your transformation equation, you could translate the edges of a raster map to your new system and then use r.region.
> 
> Moritz