[GRASS-dev] Zooming issue in gis manager

Glynn Clements glynn at gclements.plus.com
Thu Nov 2 19:33:49 EST 2006

Michael Barton wrote:

> You are correct. If -a is not set in g.region it makes small rounding errors
> every time you change the region, even if you do not change the resolution
> or even if you try to set it explicitly.
> Given this, I guess it's better to avoid the small, but annoying rounding
> errors of g.region at common map scales than to keep the aligned region
> display appearing to be more accurate in less common close-ups of rasters,
> especially given that explore mode can be used to produce a display that
> correctly matches a region of a few original grid cells in close-ups.

There are better ways to preserve the resolution than "g.region -a",
i.e. setting valid bounds yourself.

Glynn Clements <glynn at gclements.plus.com>

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