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| − | <H2>
| + | --[[利用者:Sanak|Sanak]] 2009年10月4日 (日) 13:19 (UTC)このページは削除予定です。 |
| − | The GRASS region tool
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| − | </H2>
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| − | | + | |
| − | <P>
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| − | The region definition (setting a spatial working window) in GRASS is important
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| − | for working with raster layers. Vector analysis is per default not limited
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| − | to any defined region definitions. All newly-created rasters will have the
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| − | spatial extension and resolution of the currently defined GRASS region,
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| − | regardless of their original extension and resolution. The current GRASS
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| − | region is stored in the $LOCATION/$MAPSET/WIND file, and it
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| − | defines north, south, east and west bounds, number of columns and rows,
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| − | horizontal and vertical spatial resolution.
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| − | <br>
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| − | <br>
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| − | It is possible to switch on/off the visualization of the GRASS region in the
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| − | QGIS canvas using the grass_regionDisplay current GRASS region
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| − | button. <A NAME="371"></A>.
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| − | <br>
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| − | <br>
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| − | With the grass_region_editEdit current GRASS region icon you
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| − | can open a dialog to change the current region and the symbology of the GRASS
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| − | region rectangle in the QGIS canvas. Type in the new region bounds and
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| − | resolution and click OK. It also allows to select a new region
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| − | interactively with your mouse on the QGIS canvas. Therefore click with the
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| − | left mouse button in the QGIS canvas, open a rectangle, close it using the
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| − | left mouse button again and click OK.<A NAME="376"></A>
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| − | The GRASS module g.region provide a lot more parameters to define
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| − | an appropriate region extend and resolution for your raster analysis. You can
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| − | use these parameters with the GRASS Toolbox, described in Section
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| − | [[node12.html#subsec:grass_toolbox|9.9]]. | + | |
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| − | <P>
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