Difference between revisions of "WMS"

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Mini tutorial for downloading [[SRTM]] elevation and LANDSAT imagery from [http://onearth.jpl.nasa.gov NASA's OnEarth WMS server].
 
Mini tutorial for downloading [[SRTM]] elevation and LANDSAT imagery from [http://onearth.jpl.nasa.gov NASA's OnEarth WMS server].
  
* create a NZTM location (EPSG:2193) with the startup wizard.
+
Create a NZTM location (EPSG:2193) with the location wizard.
  
 
<source lang="bash">
 
<source lang="bash">
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g.rename akl_srtm.1,akl_srtm
 
g.rename akl_srtm.1,akl_srtm
 
r.colors akl_srtm color=srtm
 
r.colors akl_srtm color=srtm
 
  
 
### Download and process LANDSAT:
 
### Download and process LANDSAT:
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r.composite r=akl_landsat.red g=akl_landsat.green b=akl_landsat.blue \
 
r.composite r=akl_landsat.red g=akl_landsat.green b=akl_landsat.blue \
 
   output=akl_landsat --overwrite
 
   output=akl_landsat --overwrite
 
  
 
### Shaeded relief map
 
### Shaeded relief map
 
r.shaded.relief akl_strm
 
r.shaded.relief akl_strm
 
d.shadedmap relief=akl_strm.shade drape=akl_landsat bright=70
 
d.shadedmap relief=akl_strm.shade drape=akl_landsat bright=70
 
  
 
### 3D view
 
### 3D view
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</source>
 
</source>
  
* In the [[NVIZ]] Visualization &rarr; Raster Surface menu set the fine raster grid size to 1. Set the vertical exaggeration to 1.0 or 2.0
+
In the [[NVIZ]] <tt>Visualization &rarr; Raster Surface</tt> menu set the fine raster grid size to 1. Set the vertical exaggeration to 1.0 or 2.0
 
 
  
 
[[Category: FAQ]]
 
[[Category: FAQ]]

Revision as of 07:34, 26 December 2011

Akl landsat.png

Web_Map_Service (WMS) data can be downloaded and imported into GRASS using the r.in.wms module.

Mini tutorial for downloading SRTM elevation and LANDSAT imagery from NASA's OnEarth WMS server.

Create a NZTM location (EPSG:2193) with the location wizard.

# Zoom to AKL region
g.region n=5936130 s=5900340 \
         w=1740030 e=1776030 res=30

If downloading for your own area, try to keep the region rows and columns smaller than the maxrow,maxcol options given to r.in.wms. Please don't abuse the server, just download small chunks.

### Download and process SRTM elevation:

r.in.wms output=akl_srtm \
  mapserver="http://onearth.jpl.nasa.gov/wms.cgi" \
  -c layers=worldwind_dem format=geotiff style=short_int \
  maxcols=1600 maxrows=1600

g.rename akl_srtm.1,akl_srtm
r.colors akl_srtm color=srtm

### Download and process LANDSAT:

r.in.wms output=akl_landsat \
  mapserver="http://onearth.jpl.nasa.gov/wms.cgi" \
  -c layers=global_mosaic_base format=geotiff style=visual \
  maxcols=1600 maxrows=1600

i.landsat.rgb -p r=akl_landsat.red g=akl_landsat.green b=akl_landsat.blue
d.rgb r=akl_landsat.red g=akl_landsat.green b=akl_landsat.blue
r.composite r=akl_landsat.red g=akl_landsat.green b=akl_landsat.blue \
   output=akl_landsat --overwrite

### Shaeded relief map
r.shaded.relief akl_strm
d.shadedmap relief=akl_strm.shade drape=akl_landsat bright=70

### 3D view
nviz akl_srtm color=akl_landsat

In the NVIZ Visualization → Raster Surface menu set the fine raster grid size to 1. Set the vertical exaggeration to 1.0 or 2.0