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Overview

The DxOnline import function (<importType>DXONLINE</importType>) imports grid time series from a HDF5 file format. 

The DxOnline HDF5 file contains radar data, time step 5 minutes covering  a regular grid.

The header of the files contains all relevant information. Se the following screenshot of a sample file displayed using a HDF5 viewer.

Every file contains one dataset. The datagroup inside the dataset contains attributes. The following attributes are used by the importer:

  • location extern = <product>; value = COMP in the example
  • parameter extern = <quantity>; value = RATE in the example
  • time date = <enddate>; value = 20140506
  • time hour/minute = <endtime>; value = 223000

Configuring the Import

To make the importer known to FEWS, the import module has to be declared in the moduleInstanceDescriptors.xml in the RegionConfigFiles directory of the FEWS configuration:

<?xml version="1.0" encoding="UTF-8"?>
<moduleInstanceDescriptors xmlns="http://www.wldelft.nl/fews"
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
		xsi:schemaLocation="http://www.wldelft.nl/fews
		http://fews.wldelft.nl/schemas/version1.0/moduleInstanceDescriptors.xsd" version="1.0">
...
	<moduleInstanceDescriptor id="GridImportDxonline">
		<moduleId>TimeSeriesImportRun</moduleId>
	</moduleInstanceDescriptor>
...
</moduleInstanceDescriptors>

An example of the DxOnline import (filename: GridImportDxonline.xml) configuration will be given here. The importType is named DXONLINE which should be configured in the general section of the import.

<?xml version="1.0" encoding="UTF-8"?>
<timeSeriesImportRun xmlns="http://www.wldelft.nl/fews" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://www.wldelft.nl/fews 
	http://fews.wldelft.nl/schemas/version1.0/timeSeriesImportRun.xsd">
    <import>
		<general>
			<importType>DXONLINE</importType>
			<folder>$DXONLINE_IMPORT$\</folder>
			<idMapId>dxMapId</idMapId>			
 		</general>
 	        <timeSeriesSet>
				<moduleInstanceId>GridImportDxonline</moduleInstanceId>
				<valueType>grid</valueType>
				<parameterId>H.observed</parameterId>
				<locationId>cxLocation</locationId>
				<timeSeriesType>external historical</timeSeriesType>
				<timeStep unit="nonequidistant"/>
				<readWriteMode>add originals</readWriteMode>
			</timeSeriesSet>
	</import>
</timeSeriesImportRun>

The IdMapping configuration cemigMapId.xml is needed to maps the internal FEWS Id's to the CEMIG Id's. An example IdMapping file importer is shown below.:

<?xml version="1.0" encoding="UTF-8"?>
<idMap version="1.1" xmlns="http://www.wldelft.nl/fews"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.wldelft.nl/fews
http://fews.wldelft.nl/schemas/version1.0/idMap.xsd">
	....
	<parameter internal="H.observed" external="prec"/>
	....
</idMap>

The actual grid definition (grids.xml) looks as follows:

<?xml version="1.0" encoding="UTF-8"?>
<grids xmlns="http://www.wldelft.nl/fews" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.wldelft.nl/fews http://fews.wldelft.nl/schemas/version1.0/grids.xsd">

	<regular locationId="CMEG-anna25-location">
		<description>CMEG ANA25 Import</description>
		<rows>160</rows>
		<columns>176</columns>
		<geoDatum>WGS 1984</geoDatum>
		<firstCellCenter>
			<x>-76.25</x>
			<y>5.50</y>
		</firstCellCenter>
		<xCellSize>0.25</xCellSize>
		<yCellSize>0.25</yCellSize>
	</regular>
</grids>
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