Accuracy Assessment Metadata

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Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey

Originator: Department of the Interior

Publication_Date: 1998

Title: Rock Creek Park Vegetation Mapping Project - Accuracy Assessment Points

Geospatial_Data_Presentation_Form: database and report

Series_Information:

Series_Name: USGS-NPS Vegetation Mapping Program

Issue_Identification: Rock Creek Park

Publication_Information:

Publication_Place: Denver, CO

Publisher:

USGS Biological Resources Division, Center for Biological Informatics

Online_Linkage: <http://biology.usgs.gov/npsveg/ftp/vegmapping/rocr/rocraa.zip>

Description:

Abstract:

The accuracy assessment field work was performed in 1998 to verify the accuracy of the vegetation communities spatial data developed by the USGS-NPS Vegetation Mapping Program for Rock Creek Park. The data points were randomly chosen using ArcView random sampling routine according to vegetation association over the project area according to protocols developed by the Program. Points were located by GPS navigation and the community information was collected at the point, without knowledge of the attributes of the vegetation spatial data.

Purpose:

To verify the accuracy of the mapped vegetation communities at Rock Creek Park.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Currentness_Reference: Source of data collection

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 77.1

East_Bounding_Coordinate: 77

North_Bounding_Coordinate: 38.98333

South_Bounding_Coordinate: 38.9

Description_of_Geographic_Extent: Rock Creek Park, Washington D.C. and environs.

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: National Park Service

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: vegetation classification

Theme_Keyword: accuracy assessment

Theme_Keyword: sampling plots

Theme_Keyword: alliance

Theme_Keyword: association

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Washington D.C.

Place_Keyword: Rock Creek Park

Place_Keyword: USA

Taxonomy:

Keywords/Taxon:

Taxonomic_Keyword_Thesaurus: None

Taxonomic_Keywords: National Vegetation Classification System

Taxonomic_System:

Classification_System/Authority:

Classification_System_Citation:

Citation_Information:

Originator:

United States Department of the Interior Biological Resources Division and National Park Service

Publication_Date: 19941101

Title:

Standardized National Vegetation Classification System

Edition: Version 1

Geospatial_Data_Presentation_Form: Classification System

Series_Information:

Series_Name: USGS/NPS Vegetation Mapping Program

Issue_Identification: Final Draft

Publication_Information:

Publication_Place: Redlands, California

Publisher: ESRI

Other_Citation_Details: Prepared by the Nature Conservancy

Identification_Reference:

Citation_Information:

Originator:

United States Department of the Interior Biological Resources Division and National Park Service

Publication_Date: 19941101

Title:

Standardized National Vegetation Classification System

Edition: Version 1

Geospatial_Data_Presentation_Form: Classification System

Series_Information:

Series_Name: USGS/NPS Vegetation Mapping Program

Issue_Identification: Final Draft

Publication_Information:

Publication_Place: Redlands, California

Publisher: ESRI

Other_Citation_Details: Prepared by the Nature Conservancy

Taxonomic_Procedures:

See "Photo Interpretation Report, CSS/NPS Vegetation and Inventory and Mapping Program, Rock Creek Park," October 1, 1998 <http://biology.usgs.gov/npsveg/rocr/rocrpirpt.pdf>

Taxonomic_Completeness: Complete

General_Taxonomic_Coverage:

Vegetation Alliances of the National Vegetation Classification System (October 1995)

Taxonomic_Classification:

Taxon_Rank_Name: Kingdom

Taxon_Rank_Value: Plantae

Access_Constraints: None

Use_Constraints:

Any person using the information presented here should fully understand the data collection and compilation procedures, as described in these metadata, before beginning analysis. The burden for determining fitness for use lies entirely with the user. For purposes of publication or dissemination, citation or credit should be given to the U.S. Geological Survey and the National Park Service.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USGS/CSS/Core Science Analytics and Synthesis

Contact_Person: USGS-NPS Vegetation Mapping Program Coordinator

Contact_Address:

Address_Type: mailing and physical address

Address: Denver Federal Center, Building 810, Room 8000, MS 302

City: Denver

State_or_Province: Colorado

Postal_Code: 80225

Contact_Voice_Telephone: (303) 202-4220

Contact_Facsimile_Telephone: 303-202-4219

Contact_Electronic_Mail_Address: gs-b-npsveg@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: <http://biology.usgs.gov/npsveg/rocr/images/rocraa.pdf>

Browse_Graphic_File_Description:

225 kbyte file showing vegetation associations and location of accuracy assessment points

Browse_Graphic_File_Type: PDF

Native_Data_Set_Environment: text file

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The attributes for the accuracy assessment were recorded in the field in 1998. Vegetation associations were identified based on the field key and plant identification. If additional communities were found within a 50 meter radius of the plot center, they were recorded as well

Logical_Consistency_Report:

All attributes are codes that correspond to vegetation communities and have been checked for topographical and logical errors.

Completeness_Report:

All points were collected and analyzed. Several points fell outside the mapping area, so were discarded.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

X,Y UTM coordinates representing each of the 265 plots were collected by P-code PLGR (Precise Lightweight GPS Receiver) receivers, with an accuracy ranging from +/- 10 m. to +/- 30 m. based on 60 second averaging at each point.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Not applicable

Lineage:

Methodology:

Methodology_Type: Field

Methodology_Identifier:

Methodology_Keyword_Thesaurus: None

Methodology_Keyword: Accuracy Assessment

Methodology_Description:

Data points were located by use of a PLGR GPS receiver. Vegetation communities were identified on the basis of a dichotomous field key and plant species present.

Methodology:

Methodology_Type: Lab

Methodology_Identifier:

Methodology_Keyword_Thesaurus: None

Methodology_Keyword: Accuracy Assessment

Methodology_Description:

Accuracy assessment points were compiled into an ARCINFO point coverage and intersected with the vegetation community coverage. The resulting INFO file was exported into a text file, imported into a spreadsheet, and the attributes from the accuracy assessment and the spatial data were compared. If the attributes did not compare, an analysis of the mismatch was made and either the AA attribute or the map attribute was changed based on identification of the community on the aerial photo.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey - Biological Resources Division

Originator: U.S. National Park Service

Originator: Department of the Interior

Publication_Date: 199411

Title:

Accuracy Assessment Procedures, USGS/NPS Vegetation Mapping Program

Geospatial_Data_Presentation_Form: procedures document

Publication_Information:

Publication_Place: Denver, CO

Publisher:

USGS, Biological Resources Division, Center for Biological Informatics

Other_Citation_Details:

Prepared by: Aerial Information Systems; Redlands, CA and The Nature Conservancy, Arlington, VA under contract from U.S. Geological Survey Biological Resources Division and National Park Service.

Type_of_Source_Media: electronic document

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 199411

Ending_Date: Present

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Accuracy Assessment Procedures Document

Source_Contribution:

This document established the procedures and protocols for the accuracy assessment at Rock Creek Park.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Originator: Department of the Interior

Publication_Date: 19961029

Title:

Rock Creek Park Spatial Vegetation Data: Cover type / Association level of the National Vegetation Classification System

Geospatial_Data_Presentation_Form: report

Series_Information:

Series_Name: USGS-NPS Vegetation Mapping Program

Issue_Identification: Rock Creek Park

Publication_Information:

Publication_Place: Denver, CO

Publisher:

USGS, Biological Resources Division, Center for Biological Informatics

Other_Citation_Details:

Created in large part by Aerial Information Systems Redlands, CA under contract rom USGS/CSS/CSAS.

Type_of_Source_Media: Disc

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19950725

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Spatial data of vegetation communities for Rock Creek Park.

Source_Contribution:

The vegetation spatial data were tested for accuracy with the AA data.

Process_Step:

Process_Description:

The accuracy assessment field work was performed in 1998 to verify the accuracy of the vegetation communities spatial data developed by the USGS-NPS Vegetation Mapping Program for Rock Creek Park. The data points were randomly chosen using ArcView random sampling routine according to vegetation association over the project area according to protocols developed by the Program. Points were located by GPS navigation and the community information was collected at the point, without knowledge of the attributes of the vegetation spatial data.

Source_Used_Citation_Abbreviation: Spatial data of vegetation communities for Rock Creek Park.

Source_Used_Citation_Abbreviation: Accuracy Assessment Procedure Document

Process_Date: 1998

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

The ecology field sites were digitized to indicate the area for which a TNC ecologist conducted an ecological field sampling.

Direct_Spatial_Reference_Method: Point

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 18

Transverse_Mercator:

Longitude_of_Central_Meridian: -180

Latitude_of_Projection_Origin: -90

False_Easting: 50000

False_Northing: 0

Scale_Factor_at_Central_Meridian: 0.9996

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 1

Ordinate_Resolution: 1

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodedic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988

Altitude_Resolution: 1

Altitude_Distance_Units: Feet

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

The National Vegetation Classification Standard is organized hierarchically to support conservation and resource stewardship applications across multiple scales. The upper levels of the hierarchy are based on the physical form or structure of the vegetation (physiognomy) and have been refined from the international standards developed by the United nations Educational, Scientific, and Cultural Organization (UNESCO). The two most detailed levels of the hierarchy are based on the species composition of existing vegetation (floristics) and reflect the phyto-sociological standards that were originally developed by European ecologists. The vegetation classification is continually advanced through the collection and analysis of new field data and will be greatly strengthened during the course of the USGS-NPS mapping efforts. Data file attributes include species, alliance, community element, and land cover.

Entity_and_Attribute_Detail_Citation:

Grossman, D. Et al. 1994. National Park Service/ National Biological Service Vegetation Mapping Project, Standardized National Vegetation Classification System 209 pp.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USGS/CSS/Core Science Analytics and Synthesis

Contact_Person: USGS-NPS Vegetation Mapping Program Coordinator

Contact_Address:

Address_Type: mailing and physical address

Address: Denver Federal Center, Building 810, Room 8000, MS 302

City: Denver

State_or_Province: Colorado

Postal_Code: 80225

Contact_Voice_Telephone: (303) 202-4220

Contact_Facsimile_Telephone: 303-202-4219

Contact_Electronic_Mail_Address: gs-b-npsveg@usgs.gov

Distribution_Liability:

The U.S. Geological Survey and the National Park Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (if available) are not legal documents and are not intended to be used as such.

The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. Any related graphics (if available) are intended to aid the data user in acquiring relevant data; it is not approriate to use the related graphics as data.

The U.S. Geological Survey and the National Park Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from an U.S. Geological Survey and National Park Service servers and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. Mention of trade names or commercial products in this metadata report does not constitute endorsement or recommendation for use by the U. S. Department of the Interior, U. S. Geological Survey and National Park Service.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: HTML

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://biology.usgs.gov/npsveg/rocr/index.html>

Access_Instructions: Internet Access

Fees: None

Metadata_Reference_Information:

Metadata_Date: 200102

Metadata_Review_Date: 20100608

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USGS/CSS/Core Science Analytics and Synthesis

Contact_Person: USGS-NPS Vegetation Mapping Program Coordinator

Contact_Address:

Address_Type: mailing and physical address

Address: Denver Federal Center, Building 810, Room 8000, MS 302

City: Denver

State_or_Province: Colorado

Postal_Code: 80225

Contact_Voice_Telephone: (303) 202-4220

Contact_Facsimile_Telephone: 303-202-4219

Contact_Electronic_Mail_Address: gs-b-npsveg@usgs.gov

Metadata_Standard_Name:

FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001.1-1999

Metadata_Extensions:

Online_Linkage:

<http://www.nbii.gov/portal/server.pt/community/fgdc_metadata/255>