Generally the following data maps need to be imported in Atoll:
heights (map of the altitude above sea level),
clutter classes (type of land used, building, forest, water) and
vectors (vector maps).
The import order is optional. For this document, the order is heights->clutter->vectors.
Clutter Classes define what type of land cover (building, forest, water, etc.) is present over a given location
Clutter Class Data
Atoll supports 8-bit colour-coded clutter data. This corresponds to a maximum of 255 different classes.
Each clutter class represents a land usage type. Figure 2-8 gives an example of a Clutter map.
General parameters (average height and slow fading standard deviation) are to be assigned to each clutter class as presented in Figure 2-9.
Atoll also allows the user to define an ‘indoor loss’ on a per clutter class basis,
in order to model building penetration loss. Propagation model specific parameters may be entered at the
propagation model level. This allows different propagation models to be used in the same project. Multi-layers
Clutter maps are supported with the same priority mechanism as for the Terrain Elevation maps.
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