[GRASS-user] Re: link to datasets from other locations?

[Nikos Alexandris]

Nikos:
> > > "GRASS' logical database structure (one projection
> > > definition per LOCATION) is designed to avoid problems
> > > such as the ones introduced with the "on-the-fly"
> > > reprojection ability (typically problems caused by
> > > mixed datums) which is present in most GISes."

Hamish:
> > I'm not sure I'd use the word "designed" that way, AFAIK that
> > structure was designed long before datum support was even thought
> > about for GRASS. it's just a matter of enforcing consistency
> > as a way to keep a complicated job from getting all muddled up.

> > fwiw in GRASS 5 there is some contrib code from Lockheed Martin
> > to change the projection of the display window at runtime.
 
> > also I don't mean to rag on other GISs too much, obviously we
> > are not some perfection and have many bugs and design issues too.
> > just that we should try to learn from mistakes we see around us. 


Nikos:
> Good point! So, change "design" to ...  OR  Just remove the "design"
> verb... !?

Changed to:

"GRASS' logical database structure (one projection definition per
LOCATION) avoids problems such as the ones introduced with the
"on-the-fly" reprojection ability (typically problems caused by mixed
datums) which is present in most GISes."

Please correct if required. Thanks, Nikos
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[1] http://grass.osgeo.org/wiki/Location_and_Mapsets