SLC DOMINANT / SUBDOMINANT File

Filename

SLC.DOMSUB

Description

The DOMSUB file describes aspects of soil landscapes which had been described in version 1.1, but not carried forward into the Component / Carbon Layer Table structure.

Contents

Field	Name	Width	Type
1	SL	6	I	(relate key)
2	RELIABILITY	1	C	(Reliability class of polygon)
3	COMPLEXITY	1	C	(Complexity class of polygon)
4	DISTRDOM	3	I	(Percentage distribution )
5	DISTRSUB	3	I
6	REGFMDOM	1	C	(Regional Landform)
7	REGFMSUB	1	C
8	CMPLRDOM	1	C	(Kind of compacted, consolidated, or contrasting layer)
9	CMPLRSUB	1	C
10	CMPDPDOM	1	C	(Depth to compacted, consolidated, or contrasting layer)
11	CMPDPSUB	1	C
12	AVWATDOM	1	C	(Available water capacity)
13	AVWATSUB	1	C
14	WATABDOM	1	C	(Depth to water table)
15	WATABSUB	1	C
16	PHCALDOM	3.1	N	(pH measured in CaCl2)
17	PHCALSUB	3.1	N
18	PHWATDOM	3.1	N	(pH measured in water)
19	PHWATSUB	3.1	N
20	NITRODOM	1	C	(Nitrogen content)
21	NITROSUB	1	C
22	WATBDDOM	1	C	(Water bodies)
23	WATBDSUB	1	C
24	NAME1DOM	6	C	(Soil Name)
25	NAME1SUB	6	C
26	NAME2DOM	6	C	(Soil Name)
27	NAME2SUB	6	C

Field names ending with DOM refer to the dominant soil landscape.
Field names ending with SUB refer to the subdominant soil landscape.

NOTE: A number of attributes are included in this file for historical reasons. They are not documented here, and should be ignored by most users.

Relationships

• A record in this file is unique with respect to SL.
• SL is required to relate (1:1) to the PAT.

The proportion of the polygon occupied by the dominant and subdominant soil landscapes is identified. However, their location within the polygon is not defined.

 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

The DOMSUB file is not included with the SLC version 2.2 datasets available on this website.  It must be downloaded separately.

• How to calculate areas of Soil Landscape components

Limitations

• The SLCs have seen quite a few updates and boundary changes since version 1.1, but the DOMSUB data has not been validated or upgraded. Consequently, the reliability of this information may be poorer than the data found in the Component Table.

Background

The DOMSUB file was extracted from the original dominant and subdominant files found in SLC version 1.1, in response to continuing requirements for pH and other attributes found only in these files. It was compiled from all existing 1.1 GIS coverages by intersecting those polygons with the more current version 2.2 polygons, and linking the version 2.2 polygon to the most dominant version 1.1 data.

effective Version 2.2  Source: updated from Shields et al., 1991 by Peter Schut
Contact: SLC coordinator