Visibility Analysis

Author: V.Wichmann (c) 2013
Menu: Terrain Analysis | Lighting and Visibility

Description

This tool performs a visibility analysis using light source or observer points from a points layer.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	grid, input	`ELEVATION`	-	-
Input	Points	shapes, input	`POINTS`	Observer points.	-
Output	Visibility	grid, output	`VISIBILITY`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Output	choice	`METHOD`	-	Available Choices: [0] Visibility [1] Shade [2] Distance [3] Size Default: 3
	Unit	choice	`UNIT`	-	Available Choices: [0] radians [1] degree Default: 1
	Cumulative	boolean	`CUMULATIVE`	If not set, output is the maximum size, or the cumulated sizes otherwise.	Default: 0
	Ignore No-Data	boolean	`NODATA`	Ignore elevations that have been marked as no-data.	Default: 0
	Height	table field	`HEIGHT`	Height of the light source or observer above ground.	-
	Default	floating point number	`HEIGHT_DEFAULT`	default value if no attribute has been selected	Minimum: 0.000000 Default: 10.000000

Command Line

Usage: saga_cmd ta_lighting 6 [-ELEVATION ] [-VISIBILITY ] [-METHOD ] [-UNIT ] [-CUMULATIVE ] [-NODATA ] [-POINTS ] [-HEIGHT ] [-HEIGHT_DEFAULT ]
  -ELEVATION:        	Elevation
	grid, input
  -VISIBILITY:       	Visibility
	grid, output
  -METHOD:           	Output
	choice
	Available Choices:
	[0] Visibility
	[1] Shade
	[2] Distance
	[3] Size
	Default: 3
  -UNIT:             	Unit
	choice
	Available Choices:
	[0] radians
	[1] degree
	Default: 1
  -CUMULATIVE:       	Cumulative
	boolean
	Default: 0
  -NODATA:           	Ignore No-Data
	boolean
	Default: 0
  -POINTS:           	Points
	shapes, input
  -HEIGHT:           	Height
	table field
  -HEIGHT_DEFAULT:	Default
	floating point number
	Minimum: 0.000000
	Default: 10.000000