Create Global LoS

Creates a line-of-sight from each point in the observers layer through each point in the targets layer. Each line-of-sight starts at the observer and ends at the edge of the DEM raster behind the target.

Parameters

Label Name Type Description
Raster Layer DEM DemRasters [raster][list] Raster DEMs on which the LoS is calculated.
Observers point layer ObserverPoints [vector: point] Point layer representing the observers.
Observer ID field ObserverIdField [tablefield: numeric] Field containing IDs for observer points.
Observer offset field ObserverOffset [tablefield: numeric] Field containing the offset above DEM for observer points.
Targets point layer TargetPoints [vector: point] Point layer representing the targets.
Target ID field TargetIdField [tablefield: numeric] Field containing IDs for target points.
Target offset field TargetOffset [tablefield: numeric] Field containing the offset above DEM for target points.
LoS sampling distance LineDensity [distance]

Default:
1		 The distance by which the LoS is segmented.
Output layer OutputLayer [vector: line] Output layer containing the LoS.

Outputs

Label Name Type Description
Output layer OutputLayer [vector: line] Output layer containing the LoS.

Fields in the output layer

  • los_type - string - for this tool the values is always global
  • id_observer - integer - value from field specified in Observer ID field
  • id_target - integer - value from field specified in Target ID field
  • observer_offset - double - value from the field specified in Observer offset field
  • target_offset - double - value from the field specified in Target offset field
  • target_x - double - X coordinate of point in Targets point layer, used later in analyses
  • target_y - double - Y coordinate of point in Targets point layer, used later in analyses

Tool screenshot

Create global LoS