WCS

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Revision as of 15:55, 4 January 2014 by Sbl (talk | contribs) (Using WCS in GRASS GIS, limit to BB)

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This page is about support of OGC web coverage services (WCS) in GRASS GIS.

Metasites and collections of WCS servers

  • ...

Using WCS in GRASS GIS

One option is to register the WCS service via r.external.

First create ASCII file with this content, named e.g. "wcs_geoserver_LL.wcs":

 
<WCS_GDAL>
  <ServiceURL>http://demo.opengeo.org/geoserver/wcs?</ServiceURL>
  <CoverageName>Img_Sample</CoverageName>
</WCS_GDAL>

or simply download this file from here.

Start GRASS in a latlong location (EPSG 4326), then register the WCS file:

 
r.external input=wcs_geoserver_LL.wcs output=wcs_data

Then you can look at the map in the wxGUI map display:

Import of WCS via r.external, display with RGB viewer

In order to limit the WCS to a bounding box (e.g. from current region) a GDAL vrt file can be created from the WCS ASCII file using gdalbuildvrt:

 
gdalbuildvrt wcs_geoserver_LL_BB.vrt wcs_geoserver_LL.wcs -te xmin ymin xmax ymax

See also