[CITE-Forum] Query regarding GetCoverage operation of WCS 1.0

Meenakshi Gupta meenakshi.gupta at tcs.com
Thu Dec 26 07:20:31 EST 2013


Hi All,
I have a query for GetCoverage POST request of WCS.
For e.g the GET request for GetCoverage operation of WCS is :-

http://localhost:8080/erdas-apollo/coverage/ATLANTA_LIST?
REQUEST=GetCoverage
&SERVICE=WCS
&VERSION=1.0.0
&COVERAGE=atl__tiles__1__1
&CRS=EPSG:4326
&RESPONSE_CRS=EPSG:4326
&BAND=band1
&BBOX=-78.066296,-77.121606,36.637055,37.308619
&WIDTH=500
&HEIGHT=500
&FORMAT=GeoTIFF
&INTERPOLATION=nearest neighbor
&EXCEPTIONS=application/vnd.ogc.se_xml

and the equivalent POST request for it is
HTTP-POST Example of a GetCoverage
<?xml version="1.0" encoding="UTF-8"?>
<GetCoverage service="WCS" version="1.0.0"
xmlns="http://www.opengis.net/wcs"
xmlns:gml="http://www.opengis.net/gml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<sourceCoverage>MOD09GHK.EastCoast_1_Grid_L2g_2d</sourceCoverage>
<domainSubset>
<spatialSubset>
  <gml:Envelope srsName="EPSG:4326">
    <gml:pos>-78.066296 36.637055</gml:pos>
    <gml:pos>-77.121606 37.308619</gml:pos>
  </gml:Envelope>
<gml:Grid dimension="2">
  <gml:limits>
    <gml:GridEnvelope>
        <gml:low>0 0</gml:low>
        <gml:high>500 500</gml:high>
    </gml:GridEnvelope>
   </gml:limits>
<gml:axisName>X</gml:axisName>
<gml:axisName>Y</gml:axisName>
</gml:Grid>
</spatialSubset>
<temporalSubset>
<gml:timePosition>2003-12-03T15:00:00Z</gml:timePosition>
</temporalSubset>
</domainSubset>
<rangeSubset>
<axisSubset name="Band">
<singleValue>band1</singleValue>
</axisSubset>
</rangeSubset>
<interpolationMethod>nearest neighbor</interpolationMethod>
<output>
<crs>EPSG:4326</crs>
<format>GeoTIFF</format>
</output>
</GetCoverage>

The POST request is different from GET request, as it has additional parameters also, like "GridEnvelope", "axisName".How come the POST request is different from the GET?
Are these additional parameters mandatory? 


Thanks & Regards
Meenakshi Gupta
Tata Consultancy Services
Mailto: meenakshi.gupta at tcs.com
Website: http://www.tcs.com
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