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SLC Component Table

Filename

{covername}.CMP

Description

The Component Table contains a number of fields calculated by using SOILTYPE to link to and summarize information from the Soil Name File (SNF) and Soil Layer File (SLF). Fields that are calculated are highlighted in green.

The Component table describes soil landscapes which are components of a polygon. Note that components apply to only the land area portion of the polygon.

Field	Name	Type	Width	Description
1	SL	I	7	SLC polygon number (relational key)
2	CMP	I	2	component number 1-999(relational key)
3	PROVINCE	C	2	Province code (part of relational key to SNF, SLF)
4	SOIL_CODE	C	3	Soil code (part of relational key to SNF, SLF)
5	MODIFIER	C	3	Soil code modifier (part of relational key to SNF, SLF)
6	PERCENT	I	3	percent of polygon occupied by component
7	SLOPE	C	1	slope gradient
8	STONE	C	1	surface stoniness
9	LOCSF	C	3	local surface form
10	KIND	C	1	kind of surface material
11	DRAINAGE	C	2	soil profile drainage
12	ORDER3	C	2	soil order
13	G_GROUP3	C	6	soil great group
14	S_GROUP3	C	6	soil subgroup
15	MDEP1	C	4	mode of deposition of uppermost parent material
16	MDEP2	C	4	mode of deposition of the second parent material
17	PMTEX1	C	2	texture class of uppermost parent material, using classes shown on the Texture Triangle
18	PMTEX2	C	2	texture class of underlying parent material
19	PMCALC1	C	2	calcareous class of parent material
20	PMCALC2	C	2	calcareous class of parent material
21	CFRAG1	C	1	coarse fragment content of the control section
22	CFRAG2	C	1	coarse fragment content of the control section
23	DEPTH	C	1	Depth to bedrock or root-restricting layer
24	RESTR_TYPE	C	2	Kind of compacted, consolidated, or root-restricting layer
25	AWHC	C	2	Soil available water holding capacity class.
26	SOILTYPE	C	9	Linkage key

Relationships

A record in this file is unique with respect to SL & CMP.
SOILTYPE is required to relate (N:1) to the Soil Name File (SNF).
The LAT contains information about water bodies (information which previously was found in this file).
A set of associated documentation tables are included as INFO files in these datasets. The naming convention is {covername}.CMP {field name} where {field name} is the name of the field in the component file.

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.

Background

The Soil Landscape Component Table was updated for version 3.0 to meet the requirements of a number of AAFC initiatives including National Greenhouse Gas and Carbon Accounting Validation System (NGCAVS), and the National Agri-Environmental Health Assessment and Reporting Program (NAHARP). It is based on the SLC version 2.2 component table, but has been updated to reflect new knowledge in the agricultural areas of the country. It has been compiled for all map coverages in Canada. It is a generalized version of the information that can be found in the detailed soil surveys.

effective Version 3.0