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The FEWS explorer contains a component to show map layers. These map layers are loaded by the FEWS explorer when the FEWS application is started. The location of the map layers is the "\map" directory of the application. As of the 2007-1 release the maplayers are now put in the Config/MapLayerFiles directory. As such they can now be uploaded with the Config manager and distributed to all the connected clients. When using map layers make sure the files are ArcView Shape files and that the co-ordinate system of the shape files are the same. More on configuring map layers can be found in Appendix C: "Map Component Configuration". For for information on how to configure the MapLayers see the Fews Explorer component documentation.
Parameters
Parameters are stored in the "Parameters" XML file, located in the regional configuration files. Make sure you keep the number of parameters limited to a basic set, the more parameters you use the more complicated the configuration will become. An important property of a parameter or parameter group is the unit. Use the same unit for a parameter group; this can minimise errors in configurations where conversions between time series may introduce errors. Remember that the FEWS can convert units when importing or exporting external time series. More on configuring parameters can be found in paragraph 5.4: "Parameters".
Locations
The Locations configuration file contains the information on all locations of the FEWS application. In a normal FEWS you will have a set of meteorological stations and hydrological stations. You can also add basins as locations. In this case you must enter the same information as for a location, you just treat it as a basin.
When adding locations to the system a location ID must be entered. Try using known location ID's, for example the same ID's as used in the telemetry system. Configuration of locations is explained in chapter 5.2.
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Configuration of the location icons is done in the "LocationIcons" XML file located in the FEWS system configuration files, see chapter 4.5: "Location Icons".
First Prototype
In principal all basic regional information has now been configured and we can start our first prototype. Three more files must be configured to start our first prototype:
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A detailed description of workflows is given in chapter 7. In our test we will add four workflows; an Import workflow, an Interpolation workflow, a Model workflow and a Report workflow. Each of these workflows will include one or several module instances. Workflow files are added in the workflows directory and a descriptor of the workflow must be added to the "WorkflowDescriptors" XML file located in the regional configuration directory.
Module Instances
Module instances are the actual configured FEWS modules, included in a workflow that do the forecasting tasks. When adding Module Instance to the FEWS the XML configuration file must be added to the "ModuleConfigFiles" directory and the id of the Module Instance must be added to the "ModuleInstanceDescriptors" XML file located in the regional configuration files.
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