This property can be given a static value, but since it is an attribute variable, its value can also depend on an attribute of the observer. But other attribute variables of LineOfSightOperator represent physical properties of the observer, whereas MinVisibilityHeightType represent the intended use of the observer: does it look for ground-based vehicles, or aircrafts near the ground, or aircrafts on cruising altitude? Other attribute variables may affect the size and shape of the output viewshed, but the MinVisibilityHeightType affects the very meaning of the cell values of the output. Therefore, if observers with different output height types are mixed in a map presentation, then their viewsheds ought to be displayed by different visualizers, so that their meanings are not confused. This is easy enough. If the MinVisibilityHeightType depends on an observer attribute, say TARGETTYPE, then the TARGETTYPE is also attached to the output rasters from the LineOfSightOperator, so each visualizer can use a condition that checks for an appropriate TARGETTYPE.

This property can be given a static value, but since it is an attribute variable, its value can also depend on an attribute of the observer. But other attribute variables of LineOfSightOperator represent physical properties of the observer, whereas minVisibilityHeightType represent the intended use of the observer: does it look for ground-based vehicles, or aircrafts near the ground, or aircrafts on cruising altitude? Other attribute variables may affect the size and shape of the output viewshed, but the minVisibilityHeightType affects the very meaning of the cell values of the output. Therefore, if observers with different output height types are mixed in a map presentation, then their viewsheds ought to be displayed by different visualizers, so that their meanings are not confused. This is easy enough. If the minVisibilityHeightType depends on an observer attribute, say TARGETTYPE, then the TARGETTYPE is also attached to the output rasters from the LineOfSightOperator, so each visualizer can use a condition that checks for an appropriate TARGETTYPE.

This property can be given a static value, but since it is an attribute variable, its value can also depend on an attribute of the observer. But other attribute variables of LineOfSightOperator represent physical properties of the observer, whereas minVisibilityHeightType represent the intended use of the observer: does it look for ground-based vehicles, or aircrafts near the ground, or aircrafts on cruising altitude? Other attribute variables may affect the size and shape of the output viewshed, but the minVisibilityHeightType affects the very meaning of the cell values of the output. Therefore, if observers with different output height types are mixed in a map presentation, then their viewsheds ought to be displayed by different visualizers, so that their meanings are not confused. This is easy enough. If the minVisibilityHeightType depends on an observer attribute, say TARGETTYPE, then the TARGETTYPE is also attached to the output rasters from the LineOfSightOperator, so each visualizer can use a condition that checks for an appropriate TARGETTYPE.

This property can be given a static value, but since it is an attribute variable, its value can also depend on an attribute of the observer. But other attribute variables of LineOfSightOperator represent physical properties of the observer, whereas minVisibilityHeightType represent the intended use of the observer: does it look for ground-based vehicles, or aircrafts near the ground, or aircrafts on cruising altitude? Other attribute variables may affect the size and shape of the output viewshed, but the minVisibilityHeightType affects the very meaning of the cell values of the output. Therefore, if observers with different output height types are mixed in a map presentation, then their viewsheds ought to be displayed by different visualizers, so that their meanings are not confused. This is easy enough. If the minVisibilityHeightType depends on an observer attribute, say TARGETTYPE, then the TARGETTYPE is also attached to the output rasters from the LineOfSightOperator, so each visualizer can use a condition that checks for an appropriate TARGETTYPE.