[GRASSLIST:897] Re: Georeferencing satelite photos

[Hamish]

> Currently I try to find a possibility to use GRASS for work with the
> sat.  photos I downloaded from NGIA Raster Roam 
> (http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_
> roam.html). They are simple raster images in jpg, png, tiff etc.
> format with geogr.  coordinates and datum given.
> 
> The question: is the quick way to reference the images without
> calculation of  EDGES coordinates and use several points inside
> instead (like in MapInfo  e.g.)

With corners: make a world-file (see GDAL.org help pages)
With known GCPs: i.points or add with gdal_translate.

probably much easier/faster to just use r.in.wms/r.in.wms/r.in.onearth
modules:

http://grass.gdf-hannover.de/twiki/bin/view/GRASS/GrassAddOns#Raster_add_ons

(search the archives for r.in.wms (x2))

They will download & auto geo-reference the sat images.


Hamish