Fuzzy Landform Element Classification
- Author: O.Conrad (c) 2013
- Menu: Terrain Analysis | Terrain Classification
Description
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.
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, output, optional | MEM | - | - |
| Entropy | grid, output, optional | ENTROPY | - | - |
| Confusion Index | grid, output, optional | CI | - | - |
| Plain | grid, output, optional | PLAIN | - | - |
| Pit | grid, output, optional | PIT | - | - |
| Peak | grid, output, optional | PEAK | - | - |
| Ridge | grid, output, optional | RIDGE | - | - |
| Channel | grid, output, optional | CHANNEL | - | - |
| Saddle | grid, output, optional | SADDLE | - | - |
| Back Slope | grid, output, optional | BSLOPE | - | - |
| Foot Slope | grid, output, optional | FSLOPE | - | - |
| Shoulder Slope | grid, output, optional | SSLOPE | - | - |
| Hollow | grid, output, optional | HOLLOW | - | - |
| Foot Hollow | grid, output, optional | FHOLLOW | - | - |
| Shoulder Hollow | grid, output, optional | SHOLLOW | - | - |
| Spur | grid, output, optional | SPUR | - | - |
| Foot Spur | grid, output, optional | FSPUR | - | - |
| Shoulder Spur | grid, output, optional | 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 | - |
Command Line
Usage: saga_cmd ta_morphometry 25 [-ELEVATION ] [-SLOPE ] [-MINCURV ] [-MAXCURV ] [-PCURV ] [-TCURV ] [-FORM ] [-MEM ] [-ENTROPY ] [-CI ] [-PLAIN ] [-PIT ] [-PEAK ] [-RIDGE ] [-CHANNEL ] [-SADDLE ] [-BSLOPE ] [-FSLOPE ] [-SSLOPE ] [-HOLLOW ] [-FHOLLOW ] [-SHOLLOW ] [-SPUR ] [-FSPUR ] [-SSPUR ] [-INPUT ] [-MEMBERSHIP ] [-SLOPETODEG ] [-T_SLOPE_MIN ] [-T_SLOPE_MAX ] [-T_CURVE_MIN ] [-T_CURVE_MAX ]
-ELEVATION: Elevation
grid, input
-SLOPE: Slope
grid, input
-MINCURV: Minimum Curvature
grid, input
-MAXCURV: Maximum Curvature
grid, input
-PCURV: Profile Curvature
grid, input
-TCURV: Tangential Curvature
grid, input
-FORM: Landform
grid, output
-MEM: Maximum Membership
grid, output, optional
-ENTROPY: Entropy
grid, output, optional
-CI: Confusion Index
grid, output, optional
-PLAIN: Plain
grid, output, optional
-PIT: Pit
grid, output, optional
-PEAK: Peak
grid, output, optional
-RIDGE: Ridge
grid, output, optional
-CHANNEL: Channel
grid, output, optional
-SADDLE: Saddle
grid, output, optional
-BSLOPE: Back Slope
grid, output, optional
-FSLOPE: Foot Slope
grid, output, optional
-SSLOPE: Shoulder Slope
grid, output, optional
-HOLLOW: Hollow
grid, output, optional
-FHOLLOW: Foot Hollow
grid, output, optional
-SHOLLOW: Shoulder Hollow
grid, output, optional
-SPUR: Spur
grid, output, optional
-FSPUR: Foot Spur
grid, output, optional
-SSPUR: Shoulder Spur
grid, output, optional
-INPUT: Input
choice
Available Choices:
[0] elevation
[1] slope and curvatures
Default: 0
-MEMBERSHIP: Memberships
boolean
Default: 0
-SLOPETODEG: Slope Grid Units
choice
Available Choices:
[0] degree
[1] radians
Default: 0
-T_SLOPE_MIN: Slope Thresholds [Degree]
value range
-T_SLOPE_MAX: Slope Thresholds [Degree]
value range
-T_CURVE_MIN: Curvature Thresholds [1000 / m]
value range
-T_CURVE_MAX: Curvature Thresholds [1000 / m]
value range