Component Table (CMP)
The Component Table describes each of the individual soil landscapes which comprise the polygon (i.e. the components of the polygon). Note that components apply to only to the land and wetland portion of the polygon.
|3||PERCENT||integer||3||Percent of polygon occupied by the component|
|6||STONINESS||string||1||Surface Stoniness Class|
|9||MODIFIER||string||5||Soil Code Modifier|
|10||PROFILE||string||1||Type of soil profile|
|11||SOIL_ID||string||11||Soil Name Identifier|
|12||CMP_ID||string||14||Polygon Component Identifier|
- A record in this file is unique with respect to POLY_ID & CMP.
- SOIL_ID is required to relate (N:1) to the SNT.
- CMP_ID is required to relate (1:1) to the CRT.
The proportion of the polygon occupied by each separate component is identified. However, their location within the polygon is not defined. While the data model does not restrict the number of components or the proportion of the polygon that they occupy, restrictions have been recommended from a subject matter/organization standpoint.
Note that the dominant component for some polygons will be a non-soil (e.g. ice or rock). Analyses involving dominant soil components should take this fact into account.