Landscape Segmentation Table (LST)
The national SLCv3.2 coverage includes a new Landscape Segmentation Table for the agricultural portion of Canada, which identifies the main landform and slope combinations within each SLC polygon, and the representative soils found within each of the associated landform positions (landscape segments).
Each national SLCv3.2 polygon with soil data has a dominant landform, and some complex SLC polygons many also have a second and third significant landform. The landscape segment is identified by the LFS_ID field, while the estimated extent of the landscape segment within the SLC polygon is shown in the PERCENT field. SLC polygons with a single landscape segment have PERCENT = 100.
The structure of the SLCv3.2 Landscape Segmentation Table is shown below.
|1||POLY_ID||integer||7||SLC Polygon 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||PERCENT||decimal||4||Percent of polygon occupied by the component|
|6||CROPPED||string||1||Crop Production Likelihood Class|
|9||MODIFIER||string||5||Soil Modifier Code|
|10||PROFILE||string||1||Type of soil profile|
|12||SEGMENT_ID||string||3||Landform Segment Identifier|
|13||SOIL_ID||string||11||Soil Name Identifier|
- A record in this file is unique with respect to POLY_ID, LF_TYPE, LF_SLOPE, LF_SEGMENT, and SOIL_ID.
- LF_ID is required to relate (N:1) to the Landform Extent Table.
- LFS_ID is required to relate (N:1) to the Landform Definition Table.
- SOIL_ID is required to relate (N:1) to the Soil Name Table.
Note: The Landscape Segmentation Table identifies a named soil for each specific segment of each landform. The soil associated with each landscape segment is specified by a sequence of four fields (PROVINCE + SOIL_CODE + MODIFIER + PROFILE). Many of these soils have two alternative sets of soil attribute records in the Soil Name and Soil Layer tables, representing agricultural and native soil conditions. Most agricultural modeling applications use the agricultural version of each soil, when both are available. Both the PROFILE field and the concatenated SOIL_ID field incorporate this "agricultural bias".