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- "LAI"
- " ET" (note the three spaces in front!)
- "ET"
- "FVC"
- "LST"
- "SZA"
- "SC" - snow cover
- DSSF
- DSSF_TOT
- DIDSSF
- METREF
| Note |
|---|
This import uses a general C++ DLL for reading the HDF5 files. On some Windows systems the correct runtime components of Visual C++ Libraries are not installed by default. A Microsoft Visual C++ 2008 SP1 Redistributable Package must be installed on the computers to solve the problem. Problems have been found on Windows 2003 and Windows 2008 server computers. |
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The following example of an Import Module Instance will import the time series as equidistant series for timezone GMT with a time step of 6 hours.
| Code Block | ||||||
|---|---|---|---|---|---|---|
| ||||||
<timeSeriesImportRun ......">
<import>
<!--Meteo data-->
<general>
<importType>Landsat-HDF5</importType>
<folder>$IMPORT_FOLDER_LANDSAT$</folder>
<failedFolder>$IMPORT_FAILED_FOLDER_LANDSAT$</failedFolder>
<backupFolder>$IMPORT_BACKUP_FOLDER_LANDSAT$</backupFolder>
<idMapId>IdImportLandsat</idMapId>
<unitConversionsId>ImportLandsatUnits</unitConversionsId>
<!--radar is in GMT-->
<importTimeZone>
<timeZoneOffset>+00:00</timeZoneOffset>
</importTimeZone>
<dataFeedId>Landsat</dataFeedId>
</general>
<timeSeriesSet>
<moduleInstanceId>ImportLandsat</moduleInstanceId>
<valueType>grid</valueType>
<parameterId>Snow-cover</parameterId>
<locationId>Landsat-grid</locationId>
<timeSeriesType>external historical</timeSeriesType>
<timeStep unit="hour" multiplier="3" timeZone="GMT+1"/>
<readWriteMode>add originals</readWriteMode>
<synchLevel>6</synchLevel>
</timeSeriesSet>
</import>
</timeSeriesImportRun>
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| Info |
|---|
Defines mappings between Landsat and FEWS parameters and locations. |
| Code Block | |||||||
|---|---|---|---|---|---|---|---|
| |||||||
<idMap version="1.1" ......>
<map internalParameter="Snowcover" internalLocation="Landsat-grid" externalParameter="SC" externalLocation="Landsat-grid"/>
</idMap>
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| Info |
|---|
Defines the definition of the Landsat grid. As not all this information is present in the Landsat files, it needs to be defined in this way. |
| Code Block | ||||||
|---|---|---|---|---|---|---|
| ||||||
<?xml version="1.0" encoding="UTF-8"?>
<grids ...........>
<regular locationId="GridName">
<rows>651</rows>
<columns>1701</columns>
<geostationarySatelliteView>
<centralMeridian>0.0</centralMeridian>
</geostationarySatelliteView>
<firstCellCenter>
<!-- First x must be -COFF*2**16/CFAC, first y must be (NR-LOFF)*2**16/LFAC as found in the HDF5 files
Cell sizes must be 2**16/CFAC and 2**16/LFAC -->
<x>-1.4796</x>
<y>8.6854</y>
</firstCellCenter>
<xCellSize>0.00480387</xCellSize>
<yCellSize>0.00480387</yCellSize>
</grids>
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- The Landsat files contain a set of attributes, of which COFF, LOFF, CFAC and LFAC are the most important ones, as they can be used to determine the coordinate system.
- According to the document http://www.eumetsat.int/groups/cps/documents/document/pdf_cgms_03.pdf, the image coordinates have to be converted to intermediate coordinates x and y that in turn can be converted into longitude and latitude.
- For the Delft-FEWS configuration we need the extremes for x and y (as the satellite image is a rectangle in these coordinates).
The firstCellCenter's x and y need to be computed as:
Code Block x = -COFF * 2^16 / CFAC y = +LOFF * 2^16 / LFAC- The cell sizes are to be determined as 2^16 / CFAC and 2^16 / LFAC.
- The centralMeridian may be taken from the Landsat file, but care must be taken: as we give the cell centers a shift may be needed to get the image right.
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