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− | <H3>
| + | --[[利用者:Sanak|Sanak]] 2009年10月4日 (日) 13:15 (UTC)このページは削除予定です。 |
− | Creating a new GRASS LOCATION
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− | </H3>
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− | <P>
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− | As an an example you find the instructions how the sample GRASS
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− | LOCATION alaska, which is projected in Albers Equal Area
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− | projection with unit feet was created for the QGIS sample dataset. This
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− | sample GRASS LOCATION alaska will be used for all examples and
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− | exercises in the following GRASS GIS related chapters. It is useful to
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− | download and install the dataset on your computer [[#label_sampledata]]">>).
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− | <P>
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− | <DIV ALIGN="CENTER"><A NAME="fig:create_grass_location"></A><A NAME="107"></A>
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− | <TABLE>
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− | <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG>
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− | Creating a new GRASS LOCATION or a new MAPSET in QGIS </CAPTION>
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− | <TR><TD>
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− | <DIV ALIGN="CENTER">
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− | </DIV>
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− | <P></P>
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− | <DIV ALIGN="CENTER">[clip=true, width=10cm]create_grass_location
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− | </DIV></TD></TR>
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− | </TABLE>
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− | </DIV>
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− | <P>
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− | <OL>
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− | <LI>Start QGIS and make sure the GRASS plugin is loaded
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− | </LI>
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− | <LI>Visualize the alaska.shp Shapefile (see Section
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− | [[#sec:load_shapefile]]) from the QGIS alaska dataset [[#label_sampledata]].
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− | </LI>
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− | <LI>In the GRASS toolbar, click on the grass_open_mapsetOpen
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− | mapset icon to bring up the MAPSET wizard.
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− | </LI>
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− | <LI>Select an existing GRASS database (GISDBASE) folder
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− | grassdata or create one for the new LOCATION using a
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− | file manager on your computer. Then click Next.
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− | </LI>
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− | <LI>We can use this wizard to create a new MAPSET within an
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− | existing LOCATION (see Section [[node6.html#sec:add_mapset|9.3.2]]) or to create
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− | a new LOCATION altogether. Click on the radio button
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− | Create new location (see Figure [[#fig:create_grass_location|28]]).
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− | </LI>
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− | <LI>Enter a name for the LOCATION - we used alaska and click
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− | Next
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− | </LI>
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− | <LI>Define the projection by clicking on the radio button
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− | Projection to enable the projection list
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− | </LI>
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− | <LI>We are using Albers Equal Area Alaska (feet) projection. Since we
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− | happen to know that it is represented by the EPSG ID 2964, we enter it in
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− | the search box. (Note: If you want to repeat this process for another
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− | LOCATION and projection and haven't memorized the EPSG ID,
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− | click on the
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− | mIconProjectionEnabledprojector icon in the lower right-hand
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− | corner of the status bar (see Section [[#label_projstart]]).
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− | </LI>
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− | <LI>Click Find to select the projection
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− | </LI>
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− | <LI>Click Next
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− | </LI>
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− | <LI>To define the default region, we have to enter the LOCATION
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− | bounds in north, south, east, and west direction. Here we simply click on
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− | the button Set current QGIS extent, to apply the extend of the
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− | loaded layer alaska.shp as the GRASS default region extend.
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− | </LI>
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− | <LI>Click Next
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− | </LI>
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− | <LI>We also need to define a MAPSET within our new
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− | LOCATION. You can name it whatever you like - we used demo.
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− | [[footnode.html#foot487]]
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− | </LI>
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− | <LI>Check out the summary to make sure it's correct and click
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− | Finish
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− | </LI>
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− | <LI>The new LOCATION alaska and two MAPSETs demo
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− | and PERMANENT are created. The currently opened working set is
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− | MAPSET demo, as you defined.
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− | </LI>
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− | <LI>Notice that some of the tools in the GRASS toolbar that were
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− | disabled are now enabled.
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− | </LI>
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− | </OL>
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− | <P>
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− | If that seemed like a lot of steps, it's really not all that bad and a very
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− | quick way to create a LOCATION. The LOCATION alaska is
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− | now ready for data import (see Section [[node7.html#sec:import_loc_data|9.4]]).
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− | You can also use the already existing vector and raster data in the sample
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− | GRASS LOCATION alaska included in the QGIS alaska dataset
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− | [[#label_sampledata]] and move on to Section [[node8.html#label_vectmodel|9.5]].
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− | <P>
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