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lat/lon example

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@35651 15284696-431f-4ddb-bdfa-cd5b030d7da7
Hamish Bowman 16 năm trước cách đây
mục cha
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aa1e0168af
1 tập tin đã thay đổi với 18 bổ sung2 xóa
  1. 18 2
      vector/v.mkgrid/v.mkgrid.html

+ 18 - 2
vector/v.mkgrid/v.mkgrid.html

@@ -3,23 +3,38 @@
 <EM>v.mkgrid</EM> will create a vector map representation of a regular coordinate grid.
 Both point and area vector grids can be created.
 
+
 <H2>NOTES</H2>
 
 This is NOT to be used to generate a vector map of USGS quadrangles,
 because USGS quads are not exact rectangles.
 
-<H2>EXAMPLE</H2>
+
+<H2>EXAMPLES</H2>
 
 Make a 4x3 grid, cells 20km a side, with lower left corner at 2716500,6447000:
 <div class="code"><pre>
 v.mkgrid map=coro_grid grid=4,3 position=coor coor=2716500,6447000 box=20000,20000
 </pre></div>
+<BR>
+
+<P>
+Make a 10x12 lat/lon grid, cells 2 arc-min a side, with lower left corner
+at 167deg 52min east, 47deg 6min south. For use with e.g. QGIS you can then
+pull this grid into a projected location with <em>v.proj</em> before
+exporting as a Shapefile with <em>v.out.ogr</em> (within GRASS you could
+just use <em>d.grid -w</em> from the projected location for the same effect).
+<div class="code"><pre>
+v.mkgrid map=p2min_grid grid=10,12 position=coor coor=167:52E,47:06S box=0:02,0:02
+</pre></div>
+
 
 <H2>SEE ALSO</H2>
 
 <A HREF="v.patch.html">v.patch</A>,
 <A HREF="d.grid.html">d.grid</A>
 
+
 <H2>AUTHOR</H2>
 
 Michael Higgins,
@@ -28,4 +43,5 @@ Research Laboratory
 <P>
 Update for new vectors Radim Blazek 10/2004 
 
-<p><i>Last changed: $Date$</i>
+<p>
+<i>Last changed: $Date$</i>