[GRASS-user] Georrectify images without a coordinate system

GRASS GRASS user
,
1

Greetings

I have a couple of images, without any coordinates information, that I need to georrectify using GRASS and a georrectified image. My main concern is regarding r.in.gdal with -o option: If I do this, will it change my image resolution or extent?

Thank you
Gilbert

2

Gilbert Ferrara:

I have a couple of images, without any coordinates information, that I need
to georrectify using GRASS and a georrectified image. My main concern is
regarding r.in.gdal with -o option: If I do this, will it change my image
resolution or extent?

No. This "flag" is to be used if the user _knows_ that the datasource is
defined in the same reference system as the target (grass-)LOCATION (despite
error messages when trying to import normally).

Anyhow, unreferenced material should be imported in an XY (non-geospatially
defined) LOCATION.

Regards, Nikos

---
fyi: <http://grass.osgeo.org/wiki/Georeferencing&gt;