SLC Component Table

Filename

{covername}.CMP

Description

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

Contents

  Field  Name      Type  Width
  -----  ----      ----  -----
    1    SL          I     6    relate key
    2    CMP         I     2    relate key
    3    PERCENT     I     3    percent of polygon occupied by component
    4    KINDMAT     C     2    kind of surface material
    5    VEGET       C     2    vegetation cover and/or land use
    6    PMDEP       C     2    parent material mode of deposition
    7    CFRAG       C     1    coarse fragment content of the control section
    8    ROOTDP      C     3    rooting depth (unrestricted)
    9    DRAIN       C     1    drainage class
   10    DEVEL       C     1    soil development (classification)
   11    CALC        C     1    parent material calcareous class
   12    LOCSF       C     3    local surface form
   13    SLOPE       C     1    slope gradient
   14    SNF         C     2    relate key
   15    SOILCODE    C     3    relate key
   16    MODIFIER    C     3    relate key

Relationships

• A record in this file is unique with respect to SL & CMP.
• SL & CMP are required to relate (1:N) to the Carbon Layer File.
• SNF & SOILCODE & MODIFIER are required to relate (N:1) to the Soil Name Table.
• 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.

 

Usage

• How to map Component Table attributes
• How to calculate areas of Soil Landscape components

Limitations

• ORGANIC SOIL ATTRIBUTES

Background

The Soil Landscape Component Table was developed in response to the requirements of the Soil Carbon Data Base. It has been compiled for all map coverages in Canada and is beneficial to all other applications because it consists of major attributes important to plant growth and land management. The attribute list of the component file consists of a subset of those in the original dominant and subdominant files compiled for the provincial map coverages. However, the component file allows for more than two soil landscapes per polygon, and provides explicit descriptions of inclusions.

 effective Version 2.2  Source: updated from Soil Carbon DataBase Working Group, 1993 by Peter Schut
Contact: SLC coordinator