<div>Pedro,</div>
<div> </div>
<div>If you run a r.mapcalc, the extent and resolution will follow the current region. So, check g.region -p before run r.mapcalc. You can use g.region rast=MapLandsat to set the current region to use MapLandsat dimensions as reference. After you can reset your extention and resolution using g.region -d . By the way, read g.region --help.</div>
<div> </div>
<div>best</div>
<div>milton<br><br></div>
<div class="gmail_quote">2010/2/5 Pedro Roma <span dir="ltr"><<a href="mailto:pedroroma1982@gmail.com">pedroroma1982@gmail.com</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<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
<div>
<div></div>
<div class="h5"><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" target="_blank">glynn@gclements.plus.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div><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><font color="#888888"><br>--<br>Glynn Clements <<a href="mailto:glynn@gclements.plus.com" target="_blank">glynn@gclements.plus.com</a>><br>
</font></blockquote></div><br></div></div><br>_______________________________________________<br>grass-user mailing list<br><a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br><a href="http://lists.osgeo.org/mailman/listinfo/grass-user" target="_blank">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br>
<br></blockquote></div><br>