[GRASSLIST:244] Re: database planning suggestions

[Glynn Clements]

Kirk R. Wythers wrote:

> (1) I can read them all into a single location with a "superset" extent
> which is large enough to cover all 4 subset extents. Possibly naming an
> idividual mapset for each of the 4 sources.
> 
> (2) I can read them into 4 distinct locations (1 for each of the 4
> sources). In this case each location would have its own extent based on
> the total extent of the source maps to be joined. This option would then
> probably require only 1 mapset for each location (ie my username)
> 
> What are the advantages and/or disadvantages of each of these
> approaches? Ultimately all 4 map sources will be used for inter and
> intra map comparisons, attributes from each of the 4 sources may be
> combined into a 5th meta-map, etc... I think the name of the game at
> this point is flexability.

If they all use the same projection, use a single location, probably
with four mapsets. Most GRASS commands can read maps from other
mapsets within the current location, but only a few commands (e.g. 
[rsv].proj) can read maps from other locations.

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