r.import manual: fix WorldClim import example

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@68439 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.import/r.import.html

@@ -86,24 +86,28 @@ r.colors srtmv3_resamp10m color=elevation
 
 
 <h3>Import of WorldClim data</h3>
-Import of a subset from <a href="">Bioclim data set</a>, to be reprojected
-to current location projection (North Carolina sample dataset). While normally
-the full raster map is imported, we spatially subset using the <em>extent</em>
-parameter:
+Import of a subset from WorldClim <a href="http://worldclim.org/current">Bioclim data set</a>,
+to be reprojected to current location projection (North Carolina sample dataset).
+Different resolutions are available, in this example we use the 2.5 arc-minutes
+resolution data. During import, we spatially subset the world data to the 
+North Carolina region using the <em>extent</em> parameter:
 
 <div class="code"><pre>
-# download selected Bioclim data
+# download selected Bioclim data (2.5 arc-minutes resolution)
 wget http://biogeo.ucdavis.edu/data/climate/worldclim/1_4/grid/cur/bio_2-5m_bil.zip
 
 # extract BIO1 from package:
 unzip bio_2-5m_bil.zip bio1.bil bio1.hdr
 
+# prior to import, fix broken WorldClim extent using GDAL tool
+gdal_translate -a_ullr -180 90 180 -60 bio1.bil bio1_fixed.tif
+
 # set computational region to North Carolina, 4000 m target pixel resolution
 g.region -d res=4000 -ap
 
 # subset to current region and reproject on the fly to current location projection,
 # using -n since whole-world map is imported:
-r.import input=bio1.bil output=bioclim01 resample=bilinear \
+r.import input=bio1_fixed.tif output=bioclim01 resample=bilinear \
          extent=region resolution=region -n
 
 r.info bioclim01