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BOREAS Agriculture Canada Central Saskatchewan Vector Soils Data, R1

Documentation Revision Date: 2016-11-16

Data Set Version: V2

Summary

This data set provides soil descriptions for forested areas in the BOREAS southern study area (SSA) in central Saskatchewan, Canada provided by Agriculture Canada. The data contain soil code, modifiers, extent, and soil names for the primary, secondary, and tertiary soil units within each polygon.

This data set consists of 20 files in ESRI shapefile format (*.shp).

KNOWN PROBLEMS

The original vector data were digitized from aerial photography that was not orthometrically corrected. Therefore, the location accuracy of the soil polygons may not be as accurate as one might expect. Sharp discontinuities may exist along map boundaries. These differences could be a result of coding and mapping variations between adjacent maps.

Figure 1. Primary soil units for skd057s.shp. 3-character soil codes are referenced in cansis.txt.

Citation

Knapp, D.E., and H. Rostad. 2016. BOREAS Agriculture Canada Central Saskatchewan Vector Soils Data, R1. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1346

Table of Contents

  1. Data Set Overview
  2. Data Characteristics
  3. Application and Derivation
  4. Quality Assessment
  5. Data Acquisition, Materials, and Methods
  6. Data Access
  7. References
  8. Data Set Revisions

Data Set Overview

This data set provides soil descriptions for forested areas in the BOREAS southern study area (SSA) in central Saskatchewan, Canada provided by Agriculture Canada. The data contain soil code, modifiers, extent, and soil names for the primary, secondary, and tertiary soil units within each polygon.

Boreal Ecosystem-Atmosphere Study: The Boreal Ecosystem-Atmosphere Study was a large-scale international interdisciplinary experiment in the boreal forests of central Canada. Its focus was improving our understanding of the exchanges of radiative energy, sensible heat, water, CO2 and trace gases between the boreal forest and the lower atmosphere. A primary objective of BOREAS was to collect the data needed to improve computer simulation models of the important processes controlling these exchanges so that scientists can anticipate the effects of global change, principally altered temperature and precipitation patterns, on the biome.

Project data set list for Boreal Ecosystem-Atmosphere Study.

Data Characteristics

Spatial Coverage: BOREAS Southern Study Area, in central Saskatchewan, Canada.

Spatial Resolution: Vector data are based on soils maps that were created at a scale of 1:125,000.

Temporal Coverage: The soils were originally mapped in the early 1980s, but the data have been periodically updated by Agriculture Canada based on new information through the date of publication (2001-02-06).

Temporal Resolution: One time representation

Study Area:  (all latitudes and longitudes given in decimal degrees)

Site (Region)

Westernmost Longitude

Easternmost Longitude

Northernmost Latitude

Southernmost Latitude

BOREAS SSA

-110.4511

-99.8739

55.0614

52.8618

 

Data File Information

This data set contains 20 shapefiles and three companion files in comma-separated value format. Each shapefile is provided as a compressed (*.zip) file containing six files (*.shx, *.dbf, *.prj, *.sbn, *.sbx, and *.shp). Shapefile attributes are listed in Table 1. There are three companion files that provide soil descriptions that must be used in conjunction with the shapefiles.

Shapefiles

Spatial Data Properties

Geometry Type: Polygon

Projected Coordinate System: NAD_1927_UTM_Zone_(12, 13, or 14)N

Geographic Coordinate System: GCS_North_American_1927

Datum: D_North_American_1927

Prime Meridian: Greenwich

Angular Unit: Degree

Projection: Transverse_Mercator

false_easting: 500000.00000000

false_northing: 0.00000000

central_meridian: -105.00000000

scale_factor: 0.99960000

latitude_of_origin: 0.00000000

Linear Unit: Meter

 

 Table 1. Descriptions of attributes included in the shapefiles

Attribute

Description

Shape

Shapefile feature type (polygon)

AREA

Feature area (m^2)

PERIMETER

Feature perimeter (m)

PROVINCE

 Province abbreviation

HECTARES

 Feature area in hectares

SOIL_CODE1

3-character code for the primary soil name

SOIL_CODE2

3-character code for the secondary soil name

SOIL_CODE3

3-character code for the tertiary soil name

MODIFIER1

3-character code to show soil variations of the primary soil. The modifier applies to the soil name and the soil code. Together with the SOIL_CODE1, a unique record can be identified in the soil name and soil layer file that matches both the SOIL_CODE1 and MODIFIER1 of the polygon.

MODIFIER2

3-character code to show soil variations of the secondary soil. The modifier applies to the soil name and the soil code

MODIFIER3

3-character code to show soil variations of the tertiary soil. The modifier applies to the soil name and soil code

EXTENT1

Percent of the map occupied by a specific soil

EXTENT2

Percent of the map occupied by a specific soil

EXTENT3

Percent of the map occupied by a specific soil

 

Companion Files

The soil names (snf.csv) file and soil layer (skslf.csv) companion files are standard files that provide soil attributes for the province of Saskatchewan.  The soil code for each polygon in the ESRI Shapefiles can be linked to the corresponding soil code attribute in the soil names file. The information in the soil names file can be linked to the soil layer file. The soil layer file provides information about the soil strata for a particular soil name. The attributes in the soil name and soil layer files are listed and described in Table 2 and Table 3, respectively. Codes in the soil names and soil layer files can be decoded using using the information contained in the soil codes (cansis.txt) file.

Table 2. The soil names companion file (snf.csv) contains the following information:

Column name

Description

UNKNOWN

An unknown and undocumented attribute

PROVINCE

Province name

SOILNAME

Name of soil

SOIL_CODE

A 3-character soil code identifying a soil

MODIFIER

Soil type modifier

LU

Land use

KIND

Kind of soil

WATERTBL

Water table characteristics

ROOTRESTRI

Soil layer that restricts root growth

REST_TYPE

Type of root restricting layer

DRAINAGE

Soil drainage class

MDEP1

Mode of deposition for primary soil

MDEP2

Mode of deposition for secondary soil

MDEP3

Mode of deposition for tertiary soil

ORDER

Soil order

S_GROUP

Soil subgroup

G_GROUP

Great group

PROFILE

Header from Detail II file

DATE

Date of last revision

A-THICK

A horizon thickness

SOL-THICK

Soil thickness

SOL-CHEM

Soil chemistry

PM-MODIFY

Parent material modification

PM-COMPLEX

Parent material complex

PMDEP2

Mode of deposition of second parent material deposition where a soil name is a complex of materials

PM-CHEM

Parent material chemistry

PMTEXCLASS

Parent material textural class

TEXMODIFY

Texture modification

FAMPARTSIZ

Soil family particle size

PHYSIOG

Physiography

 

Table 3. The soil layer companion file (skslf.csv) contains the following information:

Column name 

Description

PROVINCE

Province abbreviation

SOIL_CODE

3-character soil code, as in the soil name file (snf.csv).

MODIFIER

3-character modifier code, as in the soil name file (snf.csv).

LU

Land use code

LAYER_NO

Layer number for the soil

HZN_LIT

Horizon lithological discontinuity *

HZN_MAS

Master horizon (upper case) *

HZN_SUF

Horizon suffix (lower case) *

HZN_MOD

Horizon modifier *

UDEPTH

Upper horizon depth (cm)

LDEPTH

Lower horizon depth (cm)

COFRAG

Coarse fragments (% by volume)

DOMSAND

Dominant sand fraction: - (Not applicable), VC (Very coarse), C (Coarse), M (Medium), F (Fine), VF (Very fine)

VFSAND

Very fine sand (% by weight)

TSAND

Total sand (% by weight)

TSILT

Total silt (% by weight)

TCLAY

Total clay (% by weight)

ORGCARB

Organic carbon (% by weight)

PHCA

pH in calcium chloride

PH2

pH as specified in project report

BASES

Base saturation (%)

CEC

Cation exchange capacity (meq/100g)

KSAT

Saturated hydraulic conductivity (cm/hour)

KP0

Water retention at 0 kilopascals **

KP10

Water retention at 10 kilopascals **

KP33

Water retention at 33 kilopascals **

KP1500

Water retention at 1500 kilopascals **

BD

Bulk density (g/cm3)

EC

Electrical conductivity (deciSiemens/meter)

CACO32

Calcium carbonate equivalent (%)

VONPOST

Von Post estimate of decomposition

WOOD

Volume (%) of woody material

DATE

Date of last revision

* Decode this information by referencing the Canadian System of Soil Classification (Soil Classification Working Group, 1998).

** Water retention units are % volume corrected for coarse fragment content.

Application and Derivation

These data might be used for hydrological modeling or some other ecosystem modeling activity.

Users of these data should be cautious about inferring information from this data set and extending those inferences over a larger area. The polygons from the original data set are large and may have small inclusions of various soil types that are not mapped in these data layers.

Quality Assessment

No quality assessment was performed beyond displaying the data set to make sure that it appeared to be a digital soils map covering an area of Saskatchewan.

The source in Canada from whom these data were received has strong caveats about the use of the data. These data represent broad generalizations about the soil characteristics of this area. Caution is to be used when inferring information from the data.

KNOWN PROBLEMS

The original vector data were digitized from aerial photography that was not orthometrically corrected. Therefore, the location accuracy of the soil polygons may not be as accurate as one might expect. Sharp discontinuities may exist along map boundaries. These differences could be a result of coding and mapping variations between adjacent maps.

Data Acquisition, Materials, and Methods

The original vector data were digitized from aerial photography by Agriculture Canada (Padbury and Shields, 1991).

USER NOTE:  Data files were received in ARC/INFO EXPORT format (*.e00) and converted to ESRI Shapefile format (*.shp) for distribution with this data set. 

Data Access

These data are available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).

BOREAS Agriculture Canada Central Saskatchewan Vector Soils Data, R1

Contact for Data Center Access Information:

References

Padbury, G.A and J.A. Shields. 1991. Soil Landscapes of Canada-Saskatchewan Soil Landscapes Polygon Attribute Digital Data. CanSIS No. SK018200, version 90.11.30; CLBRR Archive, Agriculture Canada, Research Branch, Ottawa, Canada (CLBRR Contribution No. 91-108D).

Soil Classification Working Group. 1998. The Canadian System of Soil Classification, 3rd ed. Agriculture and Agri-Food Canada Publication 1646, 187 pp. ISBN 0-660-17404-9

Data Set Revisions

Data were previously distributed as:

Knapp, D., and Dr. H. Rostad. 1998. BOREAS/Agriculture Canada Central Saskatchewan Vector Soils Data. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/409

Data files were converted to shapefile format (*.shp) for this distribution. No data values were changed.