On 21/02/14 17:12, Markus Metz wrote:
On Fri, Feb 21, 2014 at 2:00 PM, Moritz Lennert
<[email protected]> wrote:
On 21/02/14 11:30, Markus Metz wrote:
On Fri, Feb 21, 2014 at 9:35 AM, Moritz Lennert
<[email protected]> wrote:
On 20/02/14 22:14, Markus Metz wrote:
I would not replace a working gdal version with a probably not working
gdal version. Your gdalinfo reported a raster attribute table, not
mine. You could double-check again if your gdalinfo still finds a
raster attribute table, then import with r.in.gdal.
Out of curiosity: if a table contains several columns which one(s) is/are
imported and in what form do they appear in GRASS (I don't have a file
here
to test myself) ?
Each column has a dedicated usage. For "name" usage, the column is
treated as category labels. For any of the color usages, the column is
treated as corresponding red, green, or blue color. See also the gdal
documentation [0]. Currently, r.out.gdal exports category labels or
color rules to a raster attribute table with the new -t flag, and
r.in.gdal automatically imports any information it finds.
Markus M
[0] http://www.gdal.org/gdal_8h.html#a27bf786b965d5227da1acc2a4cab69a1
So, IIUC you get the GFU_Name and the color information, but if the table
contains several fields (which I guess will be of type GFU_Generic) these
are ignored ?
GFU_Generic usage is ignored because it is unknown what this could be good for.
VAT tables allow as many fields as the user wants, not only a class
name. But I don't know (and can't tell from ESRI's documentation)
whether these additional fields will all be considered GFU_Names or
GFU_Generics) and as I don't have relevant data here (and data that
colleagues created for me causes an error with gdal...) I can't test
this at this stage.
My question was: if a raster has several fields as in the attribute
table, would it be possible to chose the field to use as labels in GRASS ?
Moritz
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