Extract Visible/Invisible Points from LoS

Extract individual points from lines-of-sight. It is possible to extract only visible points and also to calculate extended attributes for these points.

Parameters

Label	Name	Type	Description
LoS layer	LoSLayer	[vector: line]	LoS layer to extract points from.
Use curvature corrections?	CurvatureCorrections	[boolean] Default: True	Should the curvature and refraction corrections be used?
Refraction coefficient value	RefractionCoefficient	[number] Default: 0.13	Value of refraction coefficient.
Export only visible points	OnlyVisiblePoints	[boolean] Default: False	Export only visible points on LoS or export all points on LoS (not checked).
Calculate extended attributes	ExtendedAttributes	[boolean] Default: False	Calculate extended attributes of visibility for points (not checked).
Output layer	OutputLayer	[vector: point]	Output layer containing points.

Outputs

Label	Name	Type	Description
Output layer	OutputLayer	[vector: point]	Output layer containing points.

Fields in the output layer

• id_observer - integer - value from expected field (id_observer) in LoSLayer
• id_target - integer - value from expected field (id_target) in LoSLayer
• visible - boolean - is the point visible

Additional fields if Calculate extended attributes is True

Calculation of these attributes can potentially significantly slow down the calculation.

For all types of LoS:

• angle_difference_local_horizon - double
• elevation_difference_local_horizon - double

For Global and NoTarget LoS additionally:

• angle_difference_global_horizon - double
• elevation_difference_global_horizon - double

Tool screenshot