Tool Name	Land Cover Scenario Offset
Tool ID	tta_LandCover
Library ID	tta_tools
Version	1.0
Author(s)	R.Fisher (c) 2015

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
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