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<TITLE>Re: [GRASS-user] Newbie... Locations, Projections, Regions, choices? (long)</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>On 03/31/10 2:57 AM, "Micha Silver" <<a href="micha@arava.co.il">micha@arava.co.il</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>It looks like you're off to a good start. All you need to do, in the aeaConUs location, is save a few regions. Begin with:<BR>
g.region vect=<states_vect> save=ConUS<BR>
You might want to save this Continental zoom as the default with<BR>
g.region -s ConUS <BR>
Then zoom to each of the E,Central,W etc areas and save an additional region, i.e. (after zooming to central region):<BR>
g.region save=Central<BR>
You can alternatively specify the region bounds with something like:<BR>
g.region save=Central west=-120 east=-110 ...<BR>
This all can be done in the GUI with Config->Region.<BR>
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Now you "jump" to each of the saved regions with<BR>
g.region reg=Central <BR>
etc...<BR>
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Thanks Micha. Good to know I’m on the right course. After the first step: “g.region vect=States save=ConUS” I can indeed “zoom to saved region” in the display to view the map. However, g.region region=ConUS shows:<BR>
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projection: 99 (Albers Equal Area)<BR>
zone: 0<BR>
datum: wgs84<BR>
ellipsoid: wgs84<BR>
north: 1838.08985202<BR>
south: 34.12860299<BR>
west: -1467.66023444<BR>
east: 1403.23869107<BR>
nsres: 0.05000031<BR>
ewres: 0.04999998<BR>
rows: 36079<BR>
cols: 57418<BR>
cells: 2071584022<BR>
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Unfortunately, the bounds are all offset from the central axis so I can’t use the lat. & lon. values for the boundaries as you suggest. (ie west=-120 east=-110) I can overlay a grid and get a good estimate of values that will work to define my regions. </SPAN></FONT>
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