WCS Describe Coverage Document For Cubes

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WCS_Describe_Coverage_Document_For_Cubes Description: [[TermDesc::This document is the detailed description of a WCS coverage. It lists the geo and time dimensions of the coverage, fields, additional dimensions of the fields, and field information like units. The Capabilities Processor produces this by clients request.]]

Glossary Domain: WCS

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Term Details

DescribeCoverage for NASA modis4

   <CoverageDescription>
       <ows11:Title>MODIS4 AOT</ows11:Title>
       <ows11:Abstract>AOT at 0.55 micron for both ocean (best) and land (corrected)</ows11:Abstract>

The identifier is the machine readable key for this coverage

       <Identifier>modis4</Identifier>

• Latitude and Longitude bounds in EPSG:4326 and WGS 84 projections. This is regardless what the data projection is.

       <ows11:BoundingBox crs="urn:ogc:def:crs:EPSG::4326" dimensions="2">
           <ows11:LowerCorner>-89.9500 -179.9500</ows11:LowerCorner>
           <ows11:UpperCorner>+89.9500 +179.9500</ows11:UpperCorner>
       </ows11:BoundingBox>

• Grid bounds and size in the WGS 84 projection, it's the only currently supported projection.

       <GridCRS>
           <GridBaseCRS>urn:ogc:def:crs:OGC:2:84</GridBaseCRS>
           <GridType>urn:ogc:def:method:WCS:1.1:2dSimpleGrid</GridType>
           <GridOrigin>-179.9500 -89.9500</GridOrigin>
           <GridOffsets>+0.1000 +0.1000</GridOffsets>
           <GridCS>urn:ogc:def:cs:OGC:0.0:Grid2dSquareCS</GridCS>
       </GridCRS>

• Time dimension

       <TimePeriod>
           <BeginPosition>2001-01-01T00:00:00Z</BeginPosition>
           <EndPosition>2010-05-20T00:00:00Z</EndPosition>
           <TimeResolution>P1D</TimeResolution>
       </TimePeriod>

• Fields of Coverage, this time only one.

   <Field>

• • Human Readable Title

       <ows11:Title>Optical Depth Land And Ocean</ows11:Title>

• • Machine Readable Identifier

       <Identifier>AOT</Identifier>

• • Data Definition. Value can be any number, datatype is IEEE 32 bit float and no Units Of Measure.

       <Definition>
           <ows11:AnyValue/>
           <ows11:DataType>float</ows11:DataType>
           <ows11:UOM>none</ows11:UOM>
       </Definition>

• • IEEE standard for not a number.

       <NullValue>nan</NullValue>

• • Currently no interpolation is allowed. List of Interpolations

       <InterpolationMethods>
           <Default>none</Default>
       </InterpolationMethods>

   </Field>

At the very end:

• Supported Coordinate Systems, at the very end, linear lat-lon urn:ogc:def:crs:EPSG::4326 and lon-lat urn:ogc:def:crs:OGC:2:84

   <SupportedCRS>urn:ogc:def:crs:EPSG::4326</SupportedCRS>
   <SupportedCRS>urn:ogc:def:crs:OGC:2:84</SupportedCRS>

• Supported Formats: image/netcdf and application/x-netcdf are the same, netCDF-CF. There is a need to standardize this format.

   <SupportedFormat>image/netcdf</SupportedFormat>
   <SupportedFormat>application/x-netcdf</SupportedFormat>

DescribeCoverage with elevation dimension:

NRL NAAPS for DescribeCoverage

   <CoverageDescription>

• Title=NOGAPS and NAAPS fields in press coordinate
• Abstract=none
• Identifier=NAAPS

   <ows11:Title>NOGAPS and NAAPS fields in press coordinate</ows11:Title>
   <ows11:Abstract></ows11:Abstract>
   <Identifier>NAAPS</Identifier>

• Latitude and Longitude bounds in EPSG:4326 and WGS 84 projections. This is regardless what the data projection is.

   <ows11:WGS84BoundingBox crs="urn:ogc:def:crs:OGC:2:84">
       <ows11:LowerCorner>-179.0000 -89.5000</ows11:LowerCorner>
       <ows11:UpperCorner>+180.0000 +89.5000</ows11:UpperCorner>
   </ows11:WGS84BoundingBox>

• Grid bounds and size in the WGS 84 projection, it's the only currently supported projection.

   <GridCRS>
       <GridBaseCRS>urn:ogc:def:crs:OGC:2:84</GridBaseCRS>
       <GridType>urn:ogc:def:method:WCS:1.1:2dSimpleGrid</GridType>
       <GridOrigin>-179.0000 -89.5000</GridOrigin>
       <GridOffsets>+1.0000 +1.0000</GridOffsets>
       <GridCS>urn:ogc:def:cs:OGC:0.0:Grid2dSquareCS</GridCS>
   </GridCRS>

• Time dimension

   <TimePeriod>
       <BeginPosition>2007-05-09T00:00:00Z</BeginPosition>
       <EndPosition>2007-05-20T00:00:00Z</EndPosition>
       <TimeResolution>PT6H</TimeResolution>
   </TimePeriod>

• Fields of Coverage. The example is the second on the list.

   <Field>

• • Human Readable Title

       <ows11:Title>specific humidity - nogaps</ows11:Title>

• • Machine Readable Identifier

       <Identifier>sphu</Identifier>

• • Data Definition. Value can be any number, datatype is IEEE 32 bit float and Units Of Measure ia g/g ratio

       <Definition>
           <ows11:AnyValue/>
           <ows11:DataType>float</ows11:DataType>
           <ows11:UOM>(g/g)</ows11:UOM>
       </Definition>

• • IEEE standard for not a number.

       <NullValue>nan</NullValue>

• • Currently no interpolation is allowed. List of Interpolations

       <InterpolationMethods>
           <Default>none</Default>
       </InterpolationMethods>

• • Elevation dimension, values from 1000 to 10 mbar.

       <Axis identifier="elev">
           <ows11:Title>elevation</ows11:Title>
           <AvailableKeys>
               <Key>1000.0</Key>
               <Key>975.0</Key>
               <Key>950.0</Key>
               ....
               <Key>20.0</Key>
               <Key>10.0</Key>
           </AvailableKeys>

• • Human readable meaning of the axis. The netCDF-CF has axiscode "Z" for elevation and depth dimension, so we use it.

           <ows11:Meaning>Z</ows11:Meaning>

• • Type and Units Of Measure

           <ows11:DataType>double</ows11:DataType>
           <ows11:UOM>mbar</ows11:UOM>
       </Axis>
   </Field>