Tool Visibility Analysis
This tool performs a visibility analysis using light source or observer points from a points layer.
- Author: V.Wichmann (c) 2013
- Menu: Terrain Analysis|Lighting
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | grid, input | ELEVATION | - | - |
| 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 |
| (*) optional |
Command-line
Usage: saga_cmd ta_lighting 6 [-ELEVATION <str>] [-VISIBILITY <str>] [-METHOD <str>] [-UNIT <str>] [-CUMULATIVE <str>] [-NODATA <str>] [-POINTS <str>] [-HEIGHT <str>] [-HEIGHT_DEFAULT <double>]
-ELEVATION:<str> Elevation
grid, input
-VISIBILITY:<str> Visibility
grid, output
-METHOD:<str> Output
choice
Available Choices:
[0] Visibility
[1] Shade
[2] Distance
[3] Size
Default: 3
-UNIT:<str> Unit
choice
Available Choices:
[0] radians
[1] degree
Default: 1
-CUMULATIVE:<str> Cumulative
boolean
Default: 0
-NODATA:<str> Ignore No-Data
boolean
Default: 0
-POINTS:<str> Points
shapes, input
-HEIGHT:<str> Height
table field
-HEIGHT_DEFAULT:<double> Default
floating point number
Minimum: 0.000000
Default: 10.000000