Landsat-HDF5

Overview

Imports time series data from the Landsat satellite. The files are in HDF5 file format. See the NASA site for information on the files.

Each file contains a single image of one particular meteorological parameter. The following parameters are supported (note: these are the names of the data items in the HDF5 files):

"LAI"
" ET" (note the three spaces in front!)
"ET"
"ET"
"FVC"
"LST"
"SZA"
"SC" - snow cover

Configuration (Example)

A complete import module configuration consists of an ID Mapping file and a Import Module Instance file. To convert the rainfall in a proper unit (from 0.01 mm per 3 hour to mm/hr for example) it is also required to configure a Unit Conversion file.

ModuleConfigFiles

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.

ImportLandsat.xml

<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>

IdMapFiles

Defines mappings between Landsat and FEWS parameters and locations.

sample of IdImportLandsat.xml

<idMap version="1.1" ......>
  <map internalParameter="Snowcover" internalLocation="Landsat-grid" externalParameter="SC"  externalLocation="Landsat-grid"/>
</idMap>

Grid definition

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.

sample of Grids.xml

<?xml version="1.0" encoding="UTF-8"?>
<grids ...........>
  <regular locationId="Landsat-grid">
    <rows>256</rows>
    <columns>256</columns>
    <geoDatum>Landat-grid</geoDatum>
    <firstCellCenter>
      <x>1250</x>
      <y>-1250</y>
      <z>0</z>
    </firstCellCenter>
    <xCellSize>2500</xCellSize>
    <yCellSize>2500</yCellSize>
  </regular>
</grids>

Example Files

See attached files

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