[GRASS-user] Importing, Defining, and Georeferencing

[Juan Carlos Torres Cantero]

It seem that you have a tiff instead of a geo-tiff fil.

If you have a tiff file you'll need to import it on an XY location and
then geo-reference it. You can find a clear explanation of the process on

M. Neteler, H. Mitasova: “Open Source GIS: A GRASS GIS Approach”.(3ª
edic.) 2008. Springer.

I have a scheme of the process (in Spanish) on
http://lsi.ugr.es/~jctorres/gis/tema4.html/, slides 5 to 7.

Juan Carlos Torres


Joe Bayles escribió:
> I've tried both a predefined location and an undefined XY, either way
> the options are throwing me off. When I try to set the extents or
> resolution, the functionality won't work, for example, when setting up
> a new location or extent or mapset, the N S E W boundaries are set to
> 1, and I can only change North and South.
>
> Joe Bayles
> baylesjm en jmu.edu <mailto:baylesjm en jmu.edu>
> joseph.bayles en us.army.mil <mailto:joseph.bayles en us.army.mil>
> (703) 677-2539
> AIM: joebayles
>
>
> On Mon, Apr 27, 2009 at 12:02, Juan Carlos Torres Cantero
> <jctorres en ugr.es <mailto:jctorres en ugr.es>> wrote:
>
>     Joe
>
>     You can import it both ways. Using a predefined location or asking
>     r.in.gdal to create a new one.
>
>     Anyway, you'll get three RASTER maps corresponding to the three colors
>     chanels (tiff files are raster). If you want a color copy of the input
>     map youl'll
>     need to use r.composite to mix them. And if you need a vector map
>     you'll
>     need to extract features from the raster map thin them and convert to
>     vector
>     using r.to.vect.
>
>     Juan Carlos Torres
>
>
>     Joe Bayles escribió:
>     > Hello, I'm trying to figure out how to use GRASS (brand new
>     user) and
>     > I am having a hard time switching over. I have a TIFF file I want to
>     > import and from that create a vector map using georeferencing. Every
>     > time I think I've imported it correctly, nothing shows up. I've done
>     > this both before and after creating a new map set, though I
>     don't know
>     > how effective that was. I have been using r.in.gdal, but I don't
>     know
>     > if this is what I want. I know this is a bit of a general question,
>     > but I'm a bit lost. Thanks.
>     >
>     > Joe
>     >
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