[GRASS-dev] ascii export and import, large file problem

Glynn Clements glynn at gclements.plus.com
Fri Apr 13 14:02:16 EDT 2007

Jerry Nelson wrote:

> An update on ascii export and import. When we set decimals to 16 in the
> export and import commands, the difference worked as expected; that is,
> there is no difference between the original and the exported/imported/ new
> version. Is this something that needs to be put in the documentation? Jerry

You're omitting something important: the details of the projection

r.proj projects into an existing region; it doesn't create it itself. 
Something created that region, and that's where everything went wrong.

Beyond that, if you export an ArcGrid file from a region with
non-square pixels, then re-import that file, the result will be wrong
however many decimal places you use.

Glynn Clements <glynn at gclements.plus.com>

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