[GRASS5] Re: [GRASSLIST:6833] Re: update from 5.3

[Paul Kelly]

On Sat, 21 May 2005, Hamish wrote:

> GRASS 6 / R interface is still under active development. Also be aware
> that GRASS 6 modifies the mapset's region settings to allow 3D support.
> This causes trouble when you want to go back to using 5.4 after you have
> been using 6.0, but is easily fixed. Hopefully one day there will be a
> 5.4.1 release which ignores the new 3D settings and issues an error or
> warning when a raster map with 3D data is accessed.

Today I have committed a fix to the 5.4 CVS which should hopefully work 
around this. (Check out with "cvs -z3 co -r releasebranch_5_4")

For now it ignores any unexpected key/value pairs found in the cellhd or 
region file. I could probably change it to add a warning when some of the 
new 3-D keys are found. If the region settings are changed in 5.4 it will 
overwrite the WIND file, stripping out the 3-D values. But as long as 
DEFAULT_WIND isn't changed, this could be restored by "g.region -d" 
when running 6.x again. Do 3-D rasters exist yet or do the 3-D keys only
occur in the region definition (i.e. WIND file) for now?

Paul