Potential Natural Vegetation

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: USDA Forest Service, Tonto National Forest
Publication_Date: 20071218
Title: Potential_Natural_Veg
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Tucson, AZ
Publisher: Tonto National Forest
Online_Linkage: \\PCDEG1TRH91\H$\projects_08\nf_www\ton\TON_UTM12_V1-2.mdb
Description:
Abstract:
This feature class depicts the boundaries of the potential natural vegetation on the Tonto National Forest. Potential natural vegetation (PNV) refers to the plant community that would be established if all successional sequences were completed without human interference under the present environmental conditions, including those created by humans. PNV is a useful tool to stratify the landscape into basic units of land capability. PNV maps should, by design, be rather stable. They may, however, be refined or updated as better information becomes available. In comparison, the concept of existing vegetation is based on the composition and arrangement of plants that exist today. Existing vegetation is best mapped as a separate initiative and layer with separate protocols. Existing vegetation types may be used to describe the seral stages associated with PNV types when the relationship can be clearly demonstrated. The potential natural vegetation coverage is based on mapping or modeling at the Forest or Ranger District level. It may be derived from Terrestrial Ecological Unit maps if appropriate. Data standards for hierarchical map and classification level codes for PNV are maintained by the NRIS Terra data stewards. Associated National Application: NRIS Terra <http://fsweb.nris.fs.fed.us/products/Terra/index.shtml>
Purpose:
The purpose of this feature class is to depict and label potential natural vegetation for the Tonto National Forest. The feature class will be used to provide vegetation information for forest planning and analysis. Potential Natural Vegetation (PNV) mapping units delineate areas having similar biophysical environments (e.g., similar climate and soil characteristics). PNVs are useful for characterizing terrestrial ecosystems that have similar disturbance processes and subsequent fine-scale patterns (e.g., species composition, stand structure, standing and downed wood, etc.). PNVs are a critical data component needed for modeling disturbance processes and their subsequent effects.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
Range_of_Dates/Times:
Beginning_Date: 1998
Ending_Date: 2005
Currentness_Reference:
Most current data available within the stated time period.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -112.072122
East_Bounding_Coordinate: -110.523049
North_Bounding_Coordinate: 34.453621
South_Bounding_Coordinate: 33.173276
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Potential Natural Vegetation
Theme_Keyword: Potential Vegetation Type
Theme_Keyword: habitat type
Theme_Keyword: biophysical environments
Theme_Keyword: fire behavior
Theme_Keyword: fire risks
Theme_Keyword: fire effects
Theme_Keyword: Wild and Prescribed Fire & Fuels
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Phoenix
Place_Keyword: Arizona
Access_Constraints: None
Use_Constraints:
Comparison with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, rounding of decimal coordinates during conversion, and mapping conventions over time. Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way, they are obligated to describe the types of modifications they have performed on the hardcopy map. The user specifically agrees not to misrepresent these data sets, nor to imply that changes made were approved by the USFS.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Tonto National Forest
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing address
Address: 2324 East McDowell Rd
City: Phoenix
State_or_Province: Arizona
Postal_Code: 85006
Country: USA
Contact_Voice_Telephone: 602-225-5200
Contact_Facsimile_Telephone: 602-225-5295
Hours_of_Service: 0800-1630, M-F
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.2.4.1420

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Accuracy and completeness was checked by manually comparing hardcopy plots, on-screen review, and reporting method with the source materials.
Logical_Consistency_Report:
All attributes were checked for consistency. Some "inconsistencies" were maintained due to differences between datasets.
Completeness_Report: Data set is complete.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
This is basically 1:100000 scale (100K) data with a horizontal accuracy of approximately 170 feet.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: USGS
Publication_Date: 2005
Title: Southwest Regional Gap Analysis Project
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Las Cruces, NM
Publisher: USGS/BRD/Gap Analysis Program
Source_Scale_Denominator: 24000
Type_of_Source_Media: hardcopy and digital
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1998
Ending_Date: 2005
Source_Currentness_Reference:
Most current data available within the stated time period.
Source_Citation_Abbreviation: Unknown
Source_Contribution: Potential natural vegetation polygon boundaries
Process_Step:
Process_Description:
The layer began as the 'Provisional' SW ReGAP layer (September, 2004). USGS National Gap Analysis Program. 2004. Provisional Digital Land Cover Map for the Southwestern United States. Version 1.0. RS/GIS Laboratory, College of Natural Resources, Utah State University. A cross-walk between SW ReGAP Descriptions and Potential Natural Vegetation Types was developed by The Nature Conservancy (contact Mike List mlist@tnc.org). The cross-walk was linked to ReGAP to group the categories by PNVT. The 30m raster dataset was vectorized and clipped to the Forest Boundary. The PNVT data layer was modified by adding in missing Spruce-Fir areas. Brown and Lowe's Petran Subalpine Conifer Forest polygons were substituted as Spruce-Fir according to the consensus of the Tonto. (Bob Lefevere, Sherry Tune, Terry Austin (GIS)). Brown and Lowe citation: This dataset was digitized from the August 1980 David E. Brown & Charles H. Lowe 1:1,000,000 scale, 'Biotic Communities of the Southwest'.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: US Forest Service, Southwest Regional Office
Contact_Position: Ecological Sustainability Team
Contact_Address:
Address_Type: Mailing and physical address
Address: 333 Broadway SE
City: Albuquerque
State_or_Province: NM
Postal_Code: 87102
Country: USA
Contact_Voice_Telephone: 505-842-3292
Hours_of_Service: 0800-1630 M-F, Mountain Time
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\DBAILE~1\LOCALS~1\Temp\xml18.tmp
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\cdair\LOCALS~1\Temp\xml87.tmp

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 66

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 12
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -111.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000063
Ordinate_Resolution: 0.000063
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.000003
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Potential_Natural_Veg
Entity_Type_Definition: Feature data set representing potential natural vegetation
Entity_Type_Definition_Source: None
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: PNV_CN
Attribute_Definition: Control number generated by Oracle
Attribute_Definition_Source:
National GIS Data Dictionary Standards - 6/30/2004
Attribute_Domain_Values:
Unrepresentable_Domain: Randomly generated number from oracle
Attribute:
Attribute_Label: MAP_UNIT_SYMBOL
Attribute_Definition:
Local unique/defined identifier generated by the user as a link
Attribute_Definition_Source: National GIS Data Dictionary Standards - 6/30/2004
Attribute_Domain_Values:
Unrepresentable_Domain: text
Attribute:
Attribute_Label: PROJECT
Attribute_Definition:
Code value for the project to which the map units belong
Attribute_Definition_Source: National GIS Data Dictionary Standards - 6/30/2004
Attribute_Domain_Values:
Unrepresentable_Domain: text
Attribute:
Attribute_Label: MAPU_CN
Attribute_Definition:
Redefined item created when the database is synchronized with the spatial data
Attribute_Definition_Source: National GIS Data Dictionary Standards - 6/30/2004
Attribute_Domain_Values:
Unrepresentable_Domain: text
Attribute:
Attribute_Label: DATA_SOURCE
Attribute_Definition: The medium from which the data were created/acquired
Attribute_Definition_Source:
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Attribute_Domain_Values:
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Enumerated_Domain_Value_Definition: Original CFF
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Enumerated_Domain_Value_Definition: GPS - Uncorrected Data
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Distribution_Information:
Resource_Description: Downloadable Data

Metadata_Reference_Information:
Metadata_Date: 20080130
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Southwestern Region
Contact_Person: GIS
Contact_Position: Regional GIS Coordinator
Contact_Address:
Address_Type: Mailing and physical address
Address: 333 Broadway SE
City: Albuquerque
State_or_Province: NM
Postal_Code: 87102
Country: USA
Contact_Voice_Telephone: 505-842-3292
Hours_of_Service: 0800-1630 M-F, Mountain Time
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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Generated by mp version 2.8.6 on Wed Jan 30 07:17:59 2008