[GRASS5] Database linking question

Rich Shepard rshepard at appl-ecosys.com
Wed Jan 3 10:17:20 EST 2001

On Tue, 2 Jan 2001, Eric G . Miller wrote:

> My understanding of the Arc/Info Workspace is something like a segmented
> ISAM database with "arcs" being spatially sorted and attributes being
> keyed in by id's on the given type of spatial object (with a separate
> "table" for each type).  There's got to be some kind of hierarchical tree
> to move between levels of spatial "objects"
> (regions->polys->arcs->nodes->vertices).


  Not that this will solve your problem of wanting to learn more yourself,
but Bruce's team down at Baylor includes some academic computer scientists
who've signed on the GRASS development team specifically for this type of

  Vector data structures, attribute data files, topologoy, point-in-polygon
algorithms are all in their baliwick. While I, too, at one time wanted to
learn more and roll my own, I am now content to let the experts have at it
and I'll focus on my ecological consulting to the mining industry, using
GRASS, SWAT and other tools as appropriate.

  I suggest that you contact Bruce off-list for more information.


Dr. Richard B. Shepard, President

                       Applied Ecosystem Services, Inc. (TM)
              Making environmentally-responsible mining happen. (SM)
            2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
 + 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard at appl-ecosys.com

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