[GRASS-dev] Re: GRASS Version for Release

Dylan Beaudette dylan.beaudette at gmail.com
Tue Dec 16 00:36:26 EST 2008


On Mon, Dec 15, 2008 at 4:48 AM, Markus Metz
<markus.metz.giswork at googlemail.com> wrote:
>
> Hamish wrote:
>>
>> Glynn:
>>
>>>
>>> Is #73 actually a bug, or simply noting that programs which
>>> claim to support "TIFF" invariably only support a (usually
>>> unspecified) subset of the TIFF standard?
>>>
>>
>> It's really a bug. The heart of it is us not enforcing data type limits.
>> We are silently allowing the output out of bounds values for cells of
>> a given data type/size.  see raster/r.out.gdal/local_proto.h
>>
>
> But it is possible to export GRASS rasters in a way and format that most
> other applications can read and display, now that colortable export can be
> disabled. The user can check data type limits in the man page and the range
> of the raster to be exported and choose an appropriate data type. GRASS can
> not account for all limitations in all other GIS packages (colortable,
> compression method...), but it does offer a lot of control over the export
> format. Enforcing data type limits will make sure (again by the module) that
> the full range of raster data is actually exported, the lack of it doesn't
> mean that raster export necessarily results in unusable raster files.
>
> Added my 2 cents,
>
> Markus M

I agree with Markus M. on this one.

Dylan


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