[Qgis-developer] GRASS regions

[Andrea Peri]

>As I'm having to do with topology in PostGIS I'm very interested in the
>concept behind GRASS regions. It's interesting that you mention a resolution
>as I've been thinking for a while that a default resolution could be computed
>given an extent in that the maximum error double precision floating points can
>represent depend on the biggest absolute value one may ever want to use.
>An extent (region) would then give you these upper limits so to be possibly
>usable to compute a resolution.
>
>Is this anything close to what GRASS is using these regions for ?
>
>Yeah, I know this is probably not the right list to discuss this, but
>I'm hoping grass people are also here and can help in harmonizing topologies
>some more, on a neutral gameboard :)


I guess the concept of region on grass is limited to only the rasters.
It was used to limited the portion where the grass raster analysis was
applied.
It don't work for vectors.

-- 
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Andrea Peri
. . . . . . . . .
qwerty àèìòù
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