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The column REL should have the value C to indicate that the related location is C.

In the case that the related location of a location can vary over time but that a lot of attribute stay constant it is usefull to define the constant attributes in a seperate attribute file. In the example above an attribute file is configured.

The attributes which dont vary over time can be placed in this file. However the attributeFile support the definition of a starttime and endtime in the same way it can be defined for a locationSet.

Grid display

The grid display supports the usage of time dependent locations and polygons. The time step displayed in the grid display can be varied by using the time slider at the top of the display. In a FEWS system were the locations are not time

dependent the locations and polygons shown will not change when another time step is selected. However when the locations are time dependent the locations and polygons which are shown in the display will change when another time step is selected.

The polygons of the locations of the time series shown in the display will vary automaticly over time when locations are configured to be time dependent. The map layers can be time dependent. An example configuration is shown below.

		<esriShapeLayer id="Peilgebieden">
			<file>peilgebieden_example</file>
			<visible>true</visible>
			<selectByMapItemLocationRelation>
				<relationId>PEILGEBIED</relationId>
				<locationId>%GPGIDENT%</locationId>
			</selectByMapItemLocationRelation>
			<toolTip>%GPGNAAM%</toolTip>
			<timeZoneOffset>+01:00</timeZoneOffset>
			<startDateTimeAttributeName>STARTDATE</startDateTimeAttributeName>
			<endDateTimeAttributeName>ENDDATE</endDateTimeAttributeName>
		</esriShapeLayer>

Time dependent map layers

The explorer and the grid d