Overview
Meteosat Images are generally imported as images in <filename>.png format. The Meteosat images constitute a time series of png images, that are geo-referenced by means of a specific world file. Each image needs its own world file, which in case of PNG carries the extension <filename>.pgw.
Import of images in another format, such as JPEG is also possible. The corresponding world file for a JPEG file has the extension <filename>.jpg.
The images are imported via a common time series import, for which a specific image parameter needs to be specified in a parameterGroup via the parameter id image.
DateTime stamp
For FEWS to know the datetime of the image, the filename should contain a datetimestamp in one of the following formats:
- yyyyMMddHHmm
- yyyyMMddHH
- yyyyMMdd.HHmm
Configuration (Example)
The regional parameters XML file must have a special parameter for the images that are imported.
<parameterGroup id="image"> <parameterType>instantaneous</parameterType> <unit>-</unit> <valueResolution>8</valueResolution> <parameter id="image"> <shortName>image</shortName> </parameter> </parameterGroup>
The value resolution indicates the resolution of the values of the pixels (grey tones) in the Meteosat images. In this case 8 grey tones are resampled into a single grey tone for storage space reductions. In the module for the timemeseries import run for a Meteosat image the import is then configured as follows:
<import> <general> <importType>GrayScaleImage</importType> <folder>$REGION_HOME$/Import/MeteoSat</folder> <idMapId>IdImportMeteosat</idMapId> </general> <timeSeriesSet> <moduleInstanceId>ImportMeteosat</moduleInstanceId> <valueType>grid</valueType> <parameterId>image</parameterId> <locationId>meteosat</locationId> <timeSeriesType>external historical</timeSeriesType> <timeStep unit="minute" multiplier="15"/> <readWriteMode>add originals</readWriteMode> <synchLevel>4</synchLevel> <expiryTime unit="day" multiplier="750"/> </timeSeriesSet> </import>
<map internalLocation=" ... " externalParameter="image" internalParameter=" ... " externalLocation="image"></map>
The goereferenced image can then be displayed in the grid display.