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GRASS 4.1 U.S. Army CERL 7 <br /> g.region <main> GRASS Reference Manual <main> g.region <br /> This form allows the user to set the region boundary <br /> values relative to one another. Here, the northern <br /> boundary coordinate is set equal to 1000 units larger <br /> than the southern boundary's coordinate value, and the <br /> eastern boundary's coordinate value is set equal to <br /> 1000 units larger than the western boundary's <br /> coordinate value. The corresponding forms s=n-value <br /> and <br /> w=e-value may be used to set the values of the region's <br /> southern and western boundaries, relative to the <br /> northern and eastern boundary values. <br /> g.region raster=soils <br /> This form will make the current region settings exactly <br /> the same as those given in the cell header file for the <br /> raster map layer soils. <br /> g.region raster=soils zoom=soils <br /> This form will first look up the cell header file for <br /> the raster map layer soils, use this as the current <br /> region setting, and then shrink the region down to the <br /> smallest region which still encompasses all non-zero <br /> data in the map layer soils. Note that if the <br /> parameter raster=soils were not specified, the zoom <br /> would move to encompass all non-zero data values in the <br /> soils map that were located within the current region <br /> setting. <br /> g.region -up raster=soils <br /> The -u option suppresses the re-setting of the current <br /> region definition. This can be useful when it is <br /> desired to only extract region information. In this <br /> case, the cell header file for the soils map layer is <br /> printed without changing the current region settings. <br /> g.region -u raster=soils zoom=soils save=soils <br /> This will zoom into the smallest region which <br /> encompasses all non-zero soils data values, and save <br /> the new region settings in a file to be called soils <br /> and stored under the windows directory in the user's <br /> current mapset. The current region settings are not <br /> changed. <br /> g.region -p <br /> This will print the current region in the format: <br /> projection: 1 (UTM) <br /> zone: 15 <br /> north: 4294050.00 <br /> south: 4249950.00 <br /> east: 526050.00 <br /> west: 500950.00 <br />Page 21 <br />01/03/97 2.03-02 - Lange <br />