DATA DETAILS > NATURAL FEATURES

The feature classes below are stored in the project database within the "natural_features" feature dataset.  The tables are stored in the project database outside of a feature dataset. Recommended Uses: reference layers on maps; create additional soil attributes for further analysis.

kucher_vegetation

Spatial Information: 2,497 records; each polygon and row = one conterminous vegetation zone.  
Format: file geodatabase polygon feature class
Feature Dataset: natural_features
Primary Key: OBJECTID
Attributes:
  • VEGTYP_LAB & FORM LAB: vegetation zone types.
  • Shape_Length: perimeter of each vegetation zone in meters.
  • Shape_Area: area of each vegetation zone in square meters.
Coded Domains: Yes; code definitions unknown.
Scale: unknown.
Source: unknown.

Custom Soil Datasets

The four datasets listed below are customized versions of the SSURGO Soils Database with attributes used in our final analysis.  Three datasets are dissolved versions of the first; they are helpful for creating maps of the soil results.

soil_summary

Spatial Information: 3,211 records; one row for each soil map unit within the study area; each polygon and row = one soil map unit.
Format: file geodatabase polygon feature class
Feature Dataset: natural_features
Primary Key: MUKEY
Attributes:
  • cokey
  • farmlndcl: prime farmland designation
  • MaxOfcomppct_r
  • nirrcapcl
  • irrcapcl
  • NIR_RC: reclassification of nirrcapcl. [no data] = 0; nirrcapcl [1-3] = 1 (suitable soil); nirrcapcl [4-8] = 2 (unsuitable soil).
  • IR_RC: reclassification of irrcapcl. [no data] = 0; irrcapcl [1-3] = 1 (suitable soil); irrcapcl [4-8] = 2 (unsuitable soil).
  • Shape_Length: perimeter of each polygon in meters.
  • Shape_Area: area of each polygon in square meters.
Coded Domains: none
Scale: 1:24,000
Source: Customized version of SSURGO Soils Database.  Soil Map Units were were clipped to the Sample Grid boundaries.  Attributes from component tables were summarized for the project.  Additional custom variables were added (e.g. NIR_RC).

soil_NIR_classes

Spatial Information: 3 records; multi-part polygons; ~ one row for each non-irrigated soil type within the study area.
Format: file geodatabase polygon feature class
Feature Dataset: natural_features
Primary Key: OBJECTID
Attributes:
  • NIR_RC: reclassification of nirrcapcl. [no data] = 0; nirrcapcl [1-3] = 1 (suitable soil); nirrcapcl [4-8] = 2 (unsuitable soil).
  • Shape_Length: perimeter of each polygon in meters.
  • Shape_Area: area of each polygon in square meters.
Coded Domains: see NIR_RC information above.
Scale: 1:24,000
Source: soil_summary feature class dissolved by NIR_RC codes.  

soil_IR_classes

Spatial Information: 3 records; multi-part polygons; ~ one row for each irrigated soil type within the study area.
Format: file geodatabase polygon feature class
Feature Dataset: natural_features
Primary Key: OBJECTID
Attributes:
  • IR_RC: reclassification of irrcapcl. [no data] = 0; irrcapcl [1-3] = 1 (suitable soil); irrcapcl [4-8] = 2 (unsuitable soil).
  • Shape_Length: perimeter of each polygon in meters.
  • Shape_Area: area of each polygon in square meters.
Coded Domains: see IR_RC information above.
Scale: 1:24,000
Source: soil_summary feature class dissolved by IR_RC codes.  

soil_prime_farmland

Spatial Information: 13 records; multi-part polygons; one row for each prime farmland designation.
Format: file geodatabase polygon feature class
Feature Dataset: natural_features
Primary Key: OBJECTID
Attributes:
  • farmlndcl: prime farmland designation.
  • Shape_Length: perimeter of each polygon in meters.
  • Shape_Area: area of each polygon in square meters.
Coded Domains: none.
Scale: 1:24,000
Source: soil_summary feature class dissolved by farmlndcl codes.  

Compiled Raw Data for Soils within the Study Area

The datasets below can be used to create new soil attributes for further analysis.  

soil_map_units

Spatial Information: 3,211 records; one row for each soil map unit within the study area; each polygon and row = one soil map unit.
Format: file geodatabase polygon feature class
Feature Dataset: natural_features
Primary Key: MUKEY
Attributes: All attributes were removed except the MUKEY.
Coded Domains: none
Scale: 1:24,000
Source: Customized version of SSURGO Soils Database.  Soil Map Units were were clipped to the Sample Grid boundaries.  

1_ soil_map_units

Spatial Information: 3211 records; one row for each soil map unit within the study area.
Format: file geodatabase table
Feature Dataset: none
Primary Key: MUKEY
Attributes:
  • All attributes from the "soil_map_units" table in the original SSURGO soils database.
  • See the Soil Data Mart Metadata for attribute details and definitions.
Coded Domains: none
Scale: NA
Source: SSURGO soils databases for all 50 study counties.  All records that don't link to a soil map unit inside the study area have been removed.

soil_2_component

Spatial Information: 20,317 records; one row for each soil component that links to a soil map unit within the study area.
Format: file geodatabase table
Feature Dataset: none
Primary Key: cokey
Attributes:
  • mukey = foreign key; links to MUKEY in soil_1_map_units.
  • All attributes from the "component" table in the original SSURGO soils database.
  • See the Soil Data Mart Metadata for attribute details and definitions.
Coded Domains: none
Scale: NA
Source: SSURGO soils databases for all 50 study counties.  All records that don't link to a soil map unit inside the study area have been removed.

soil_3a_chorizon

Spatial Information: 66,828 records; one row for each soil horizon that links to a soil component and soil map unit within the study area.
Format: file geodatabase table
Feature Dataset: none
Primary Key: chkey
Attributes:
  • cokey = foreign key; links to cokey in soil_2_component.
  • All attributes from the "chorizon" table in the original SSURGO soils database.
  • See the Soil Data Mart Metadata for attribute details and definitions.
Coded Domains: none
Scale: NA
Source: SSURGO soils databases for all 50 study counties.  All records that don't link to a soil map unit inside the study area have been removed.

soil_3b_ccropyld

Spatial Information: 22,049 records; one row for each record that links to a soil component and soil map unit within the study area.
Format: file geodatabase table
Feature Dataset: none
Primary Key: cocropyldkey
Attributes:
  • cokey = foreign key; links to cokey in soil_2_component.
  • All attributes from the "ccropyld" table in the original SSURGO soils database.
  • See the Soil Data Mart Metadata for attribute details and definitions.
Coded Domains: none
Scale: NA
Source: SSURGO soils databases for all 50 study counties.  All records that don't link to a soil map unit inside the study area have been removed.