Salut Markus 
Thank you for r.to.vect.tiled -- really very useful!
Below a silly quick hack to suggest for setting the region? It just
happened that I imported a raster in a Mapset with the region not set
and I was thinking, as usual, for a while what could be wrong.
Cheers, Nikos
Index: r.to.vect.tiled.py
--- r.to.vect.tiled.py (revision 65937)
+++ r.to.vect.tiled.py (working copy)
@@ -130,13 +130,19 @@
grass.use_temp_region()
curr = grass.region()
+
width = int(curr['cols'] / xtiles)
+ height = int(curr['rows'] / ytiles)
+
+ message_fatal = "The requested number of tiles in {XY} direction is too large."
+ message_region_hint = "Perhaps the computational region is not set properly?"
+
if width <= 1:
- grass.fatal("The requested number of tiles in x direction is too large")
- height = int(curr['rows'] / ytiles)
+ grass.fatal( message_fatal.format(XY='x') + ' ' + message_region_hint)
+
if height <= 1:
- grass.fatal("The requested number of tiles in y direction is too large")
-
+ grass.fatal( message_fatal.format(XY='y') + ' ' + message_region_hint)
+
do_clip = False
overlap = 0
if flags['s'] and ftype == 'area':