Ok but for instance. If my region is defined with a Spatial Resolution of 1kilometer and, if I do some r.mapcalc with two LANDSAT images, the output image will have which one of the resolutions? the Region or the 2 landsat images?
Thank you Glynn for the overview. And thank you Hamish for the weblinks On Thu, Feb 4, 2010 at 7:14 PM, Glynn Clements <[email protected]>wrote: > > Pedro Roma wrote: > > > I'm a kind of a new GRASS user and I'm a bit lost on regarding something. > > REGION (or spatial extent). > > For instance the Location North-Carolina. When the location was created a > > certain extent, projkection a Spatial Resolution was defined. But, inside > > this location there is a lot of data with different extent and regional > > cover. And, inside GRASS I can re-define region properties (g.region) and > > use a certain data to define region. And, it's possible to have a region > > with a small extent than a vectorial that exists in the Location. > > My question is, what is the region and what is its purpose? Because I > don't > > see any impact of region over my image/data processing or image > > visualization. Or is it? > > The region is mostly used for raster processing and graphical display. > > Most commands which read or write raster maps will use the bounds and > resolution from the current region. Any input maps will be cropped, > padded and/or resampled according to the region settings. > > Display commands translate geographic or cartographic coordinates to > display coordinates such that the current region just fits inside the > display window. > > Vector commands are normally unaffected by the current region. > > -- > Glynn Clements <[email protected]> >
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