Land Cover Scenario Offset
- Author: R.Fisher (c) 2015
- Menu: Grid | Analysis | Travel Time Analysis
Description
Prepare your scenario for subsequent travel time analysis with information on topography, road network, and vegetation cover.
Topography is used for automated channel network delineation. Resulting channels are categorized by their Strahler order. In the final land cover map channels use numbers above 100 (i.e. '101, 102, 103, ...' representing increasing Strahler orders). Likewise roads use numbers above 200 with the exact number based on the attribute chosen to specify the road type (i.e. 201, 202, 203, ...). Vegetation cover takes the original numbers for the final map, so these should not intermingle with numbers used for channel and road representation.
Find further information at Rohan Fisher's web page on Travel Time Modelling with SAGA.
References
- Fisher, R., and Lassa, J. (2017): Interactive, open source, travel time scenario modelling: tools to facilitate participation in health service access analysis. International Journal of Health Geographics, 16(13). doi:10.1186/s12942-017-0086-8.
- Ray, N., and Ebener, S. (2008): AccessMod 3.0: computing geographic coverage and accessibility to health care services using anisotropic movement of patients. International Journal of Health Geographics, 7(63). doi:10.1186/1476-072X-7-63.
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Roads | shapes, input | ROAD_LINES | - | - |
| Channel Network | shapes, input, optional | CHANNEL_LINES | - | - |
| Elevation | grid, input | DEM | - | - |
| Vegetation | grid, input | VEGETATION | - | - |
| Output | Land Cover | grid, output | LANDCOVER | - | - |
| Options | Attribute | table field | ROAD_CLASS | attribute specifying road's type with regard to travel time | - |
| Stream Order | table field | CHANNEL_ORDER | - | - |
| Grid System | grid system | DEM_SYSTEM | - | - |
| Grid System | grid system | LANDCOVER_SYSTEM | - | - |
Command Line
Usage: saga_cmd tta_tools tta_LandCover [-ROAD_LINES ] [-ROAD_CLASS ] [-CHANNEL_LINES ] [-CHANNEL_ORDER ] [-DEM ] [-VEGETATION ] [-LANDCOVER ]
-ROAD_LINES: Roads
shapes, input
-ROAD_CLASS: Attribute
table field
-CHANNEL_LINES: Channel Network
shapes, input, optional
-CHANNEL_ORDER: Stream Order
table field
-DEM: Elevation
grid, input
-VEGETATION: Vegetation
grid, input
-LANDCOVER: Land Cover
grid, output