Landform Definition Table (LDT)
This table defines a set of 84 landscape segments; four segments for each of 21 landform types. Each segment in each of the 21 landforms has a characteristic slope, slope length, and relative extent within the landform. The structure of this table is shown below.
|1||LFS_ID||string||3||Landform Segment Identifier|
|2||LF_TYPE||string||1||Landform Type Class|
|3||LF_SLOPE||string||1||Landform Slope Class|
|4||LF_SEGMENT||string||1||Landform Segment Class (Position)|
|5||LFS_EXTENT||integer||3||Percent of Landform in this Segment|
|6||LFS_SLOPE||decimal||4||Slope of Landform Segment|
|7||LFS_LENGTH||integer||4||Slope Length of Landform Segment|
|8||LFS_NAME||string||45||Name of Landform Segment|
- A record in this file is unique with respect to LFS_ID.
- LFS_ID is used to join this table to the Landscape Segmentation Table (LST)
A national set of 21 landform types have been established, based on field observations of representative sites in Alberta 1. Each landform is defined as having four segments, representing the upper slope, mid slope, lower slope and depression positions (U, M, L, D).
1 MacMillan, R.A., Pettapiece, W.W., and Brierley, J.A. 2005. An expert system for allocating soils to landforms through the application of soil survey tacit knowledge. Can. J. Soil Sci. 85: 103-112.