[GRASSLIST:202] Re: rotation

[Glynn Clements]

David Strauch wrote:

> If I shift to rasters I may try David Finlayson's rotation script or 
> Morten Hulden's solution of exporting, rotating and reimporting into a 
> new location (I'm assuming this could be done somehow without losing 
> attributes).  Or it may be that vector endpoints could be converted to 
> sites and rotated, converted back to vector endpoints and rebuilt into 
> vectors.

Vector maps can be rotated with v.transform.

> But I'm still importing various coverages and it seems potentially 
> cumbersome to do this process for each one -- especially if I later 
> want to readjust the orientation.  I suppose I was hoping that I could 
> create new locations that had different orientations, and be able to 
> reproject coverages (including vectors) into these locations.  It would 
> be nice to do this while working (ie with geo-referencing available), 
> but it looks like (the way regions are defined) at this point map 
> rotation will have to wait until I'm ready to print stuff out.

If you intend to process a large number of maps using a small number
of custom projections, it might be worth adding your custom
projections to the PROJ library (src/libes/proj). That should allow
you to use the [rsv].proj programs with your custom projections.

-- 
Glynn Clements <glynn.clements at virgin.net>