Item description

For some items an input item comprises both a spatial distribution and a value that may be time varying.

The spatial distribution of the item can be defined in three ways:

·         Uniform

·         Station based

·         Fully distributed

Uniform

The Uniform spatial distribution defines the same value in the entire area. The value can be defined by a constant or by a time-varying dfs0 file.

Station based

If the data is station-based the area is divided into a number of sub areas, one for each station. You define the spatial area related to each station by grid codes in a dfs2 file or by polygons in a shape file (.shp). Then for each station a sub-item will appear where you can enter the time series of values for the station.

Fully distributed

If the data is fully distributed you need to specify a dfs2 file with the values to be used.