Tool Fuzzy Landform Element Classification
Algorithm for derivation of form elements according to slope, maximum curvature, minimum curvature, profile curvature, tangential curvature, based on a linear semantic import model for slope and curvature and a fuzzy classification Based on the AML script 'felementf' by Jochen Schmidt, Landcare Research.
References
- Schmidt, J. & Hewitt, A. (2004): Fuzzy land element classification from DTMs based on geometry and terrain position. Geoderma, 121(3-4), 243-256. CiteSeerX.
- Author: O.Conrad (c) 2013
- Menu: Terrain Analysis|Terrain Classification
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | ELEVATION | - | - |
| Slope | Grid (input) | SLOPE | - | - |
| Minimum Curvature | Grid (input) | MINCURV | - | - |
| Maximum Curvature | Grid (input) | MAXCURV | - | - |
| Profile Curvature | Grid (input) | PCURV | - | - |
| Tangential Curvature | Grid (input) | TCURV | - | - |
| Output | Landform | Grid (output) | FORM | - | - |
| Maximum Membership (*) | Grid (optional output) | MEM | - | - |
| Entropy (*) | Grid (optional output) | ENTROPY | - | - |
| Confusion Index (*) | Grid (optional output) | CI | - | - |
| Plain (*) | Grid (optional output) | PLAIN | - | - |
| Pit (*) | Grid (optional output) | PIT | - | - |
| Peak (*) | Grid (optional output) | PEAK | - | - |
| Ridge (*) | Grid (optional output) | RIDGE | - | - |
| Channel (*) | Grid (optional output) | CHANNEL | - | - |
| Saddle (*) | Grid (optional output) | SADDLE | - | - |
| Back Slope (*) | Grid (optional output) | BSLOPE | - | - |
| Foot Slope (*) | Grid (optional output) | FSLOPE | - | - |
| Shoulder Slope (*) | Grid (optional output) | SSLOPE | - | - |
| Hollow (*) | Grid (optional output) | HOLLOW | - | - |
| Foot Hollow (*) | Grid (optional output) | FHOLLOW | - | - |
| Shoulder Hollow (*) | Grid (optional output) | SHOLLOW | - | - |
| Spur (*) | Grid (optional output) | SPUR | - | - |
| Foot Spur (*) | Grid (optional output) | FSPUR | - | - |
| Shoulder Spur (*) | Grid (optional output) | SSPUR | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Input | Choice | INPUT | if elevation is selected, slopes and curvatures will be calculated internally | Available Choices:
[0] elevation
[1] slope and curvatures
Default: 0 |
| Memberships | Boolean | MEMBERSHIP | - | Default: 0 |
| Slope Grid Units | Choice | SLOPETODEG | - | Available Choices:
[0] degree
[1] radians
Default: 0 |
| Slope Thresholds [Degree] | Value range | T_SLOPE | lower and upper thresholds for semantic import model, planar vs. sloped areas | - |
| Curvature Thresholds [1000 / m] | Value range | T_CURVE | lower and upper thresholds for semantic import model, straight vs. curved areas | - |
| (*) optional |
Command-line
Usage: saga_cmd ta_morphometry 25 [-ELEVATION <str>] [-SLOPE <str>] [-MINCURV <str>] [-MAXCURV <str>] [-PCURV <str>] [-TCURV <str>] [-FORM <str>] [-MEM <str>] [-ENTROPY <str>] [-CI <str>] [-PLAIN <str>] [-PIT <str>] [-PEAK <str>] [-RIDGE <str>] [-CHANNEL <str>] [-SADDLE <str>] [-BSLOPE <str>] [-FSLOPE <str>] [-SSLOPE <str>] [-HOLLOW <str>] [-FHOLLOW <str>] [-SHOLLOW <str>] [-SPUR <str>] [-FSPUR <str>] [-SSPUR <str>] [-INPUT <str>] [-MEMBERSHIP <str>] [-SLOPETODEG <str>] [-T_SLOPE_MIN <double>] [-T_SLOPE_MAX <double>] [-T_CURVE_MIN <double>] [-T_CURVE_MAX <double>]
-ELEVATION:<str> Elevation
Grid (input)
-SLOPE:<str> Slope
Grid (input)
-MINCURV:<str> Minimum Curvature
Grid (input)
-MAXCURV:<str> Maximum Curvature
Grid (input)
-PCURV:<str> Profile Curvature
Grid (input)
-TCURV:<str> Tangential Curvature
Grid (input)
-FORM:<str> Landform
Grid (output)
-MEM:<str> Maximum Membership
Grid (optional output)
-ENTROPY:<str> Entropy
Grid (optional output)
-CI:<str> Confusion Index
Grid (optional output)
-PLAIN:<str> Plain
Grid (optional output)
-PIT:<str> Pit
Grid (optional output)
-PEAK:<str> Peak
Grid (optional output)
-RIDGE:<str> Ridge
Grid (optional output)
-CHANNEL:<str> Channel
Grid (optional output)
-SADDLE:<str> Saddle
Grid (optional output)
-BSLOPE:<str> Back Slope
Grid (optional output)
-FSLOPE:<str> Foot Slope
Grid (optional output)
-SSLOPE:<str> Shoulder Slope
Grid (optional output)
-HOLLOW:<str> Hollow
Grid (optional output)
-FHOLLOW:<str> Foot Hollow
Grid (optional output)
-SHOLLOW:<str> Shoulder Hollow
Grid (optional output)
-SPUR:<str> Spur
Grid (optional output)
-FSPUR:<str> Foot Spur
Grid (optional output)
-SSPUR:<str> Shoulder Spur
Grid (optional output)
-INPUT:<str> Input
Choice
Available Choices:
[0] elevation
[1] slope and curvatures
Default: 0
-MEMBERSHIP:<str> Memberships
Boolean
Default: 0
-SLOPETODEG:<str> Slope Grid Units
Choice
Available Choices:
[0] degree
[1] radians
Default: 0
-T_SLOPE_MIN:<double> Slope Thresholds [Degree]
Value range
-T_SLOPE_MAX:<double> Slope Thresholds [Degree]
Value range
-T_CURVE_MIN:<double> Curvature Thresholds [1000 / m]
Value range
-T_CURVE_MAX:<double> Curvature Thresholds [1000 / m]
Value range