<div><br></div><div>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?</div>
<div><br></div>Thank you Glynn for the overview. And thank you Hamish for the weblinks<br><br><div class="gmail_quote">On Thu, Feb 4, 2010 at 7:14 PM, Glynn Clements <span dir="ltr"><<a href="mailto:glynn@gclements.plus.com">glynn@gclements.plus.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im"><br>
Pedro Roma wrote:<br>
<br>
> I'm a kind of a new GRASS user and I'm a bit lost on regarding something.<br>
> REGION (or spatial extent).<br>
> For instance the Location North-Carolina. When the location was created a<br>
> certain extent, projkection a Spatial Resolution was defined. But, inside<br>
> this location there is a lot of data with different extent and regional<br>
> cover. And, inside GRASS I can re-define region properties (g.region) and<br>
> use a certain data to define region. And, it's possible to have a region<br>
> with a small extent than a vectorial that exists in the Location.<br>
> My question is, what is the region and what is its purpose? Because I don't<br>
> see any impact of region over my image/data processing or image<br>
> visualization. Or is it?<br>
<br>
</div>The region is mostly used for raster processing and graphical display.<br>
<br>
Most commands which read or write raster maps will use the bounds and<br>
resolution from the current region. Any input maps will be cropped,<br>
padded and/or resampled according to the region settings.<br>
<br>
Display commands translate geographic or cartographic coordinates to<br>
display coordinates such that the current region just fits inside the<br>
display window.<br>
<br>
Vector commands are normally unaffected by the current region.<br>
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--<br>
Glynn Clements <<a href="mailto:glynn@gclements.plus.com">glynn@gclements.plus.com</a>><br>
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