Identification_Information: Citation: Citation_Information: Originator: Greg Podniesinski, Pennsylvania Science Office of the Nature Conservancy Publication_Date: 20041206 Title: Accuracy Assessment Points for Valley Forge National Historical Park Vegetation Mapping Project Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://biology.usgs.gov/npsveg/ftp/vegmapping/vafo/vafoaa.zip Description: Abstract: This shapefile includes the accuracy assessment points used to assess the association-level vegetation map of Valley Forge National Historic Park developed by the Center for Earth Observation, the Pennsylvania Science Office of the The Nature Conservancy (PSO-TNC) and Nature Serve for the National Park Service. Accuracy assessment was performed by staff of PSO-TNC. Purpose: The shapefile shows point locations for accuracy assesment observation points. Locations were determined using a Garmin III+ Gps unit Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200109 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Description_of_Geographic_Extent: Valley Forge National Historical Park and environs Bounding_Coordinates: West_Bounding_Coordinate: -75.472342 East_Bounding_Coordinate: -75.417142 North_Bounding_Coordinate: 40.121246 South_Bounding_Coordinate: 40.079016 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Vegetation Map Theme_Keyword: Association level Theme_Keyword: Accuracy assessment Place: Place_Keyword_Thesaurus: None Place_Keyword: Valley Forge National Historical Park Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2001 Taxonomy: Keywords/Taxon: Taxonomic_Keyword_Thesaurus: none Taxonomic_Keywords: Standardized National Vegetation Classification System Taxonomic_Keywords: vegetation classification Taxonomic_Keywords: alliance Taxonomic_Keywords: community association Taxonomic_Classification: Taxon_Rank_Name: Kingdom Taxon_Rank_Value: Plantae Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Greg Podniesinski Contact_Organization: Pennsylvania Science Office of the Nature Conservancy Contact_Position: Ecologist Contact_Address: Address_Type: mailing address Address: 208 Airport Road City: Middletown State_or_Province: Pennsylvania Postal_Code: 17057 Country: United States Contact_Voice_Telephone: 717-948-3842 Contact_Electronic_Mail_Address: c-gpodnies@state.pa.us Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Cross_Reference: Citation_Information: Originator: Greg Podniesinski, Pennsylvania Science Office of the Nature Conservancy Originator: Stephanie Perles, Pennsylvania Science Office of the Nature Conservancy Originator: Lesley Sneddon, NatureServe Originator: Bill Millinor, North Carolina State University Center for Earth Observation Publication_Date: 200412 Title: Vegetation classification and mapping of Hopewell National Historic Site Geospatial_Data_Presentation_Form: report Publication_Information: Publication_Place: Middletown, Pennsylvania Publisher: Pennsylvania Science Office of the Nature Conservancy Data_Quality_Information: Logical_Consistency_Report: ESRI Point Geometry exists. Completeness_Report: Locations for all 308 accuracy assessment points are included. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Mean horizontal accuracy of thematic accuracy assessment points was 2.55 m +/- 1.067m STD Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Kucera International Publication_Date: 200204 Title: Spring 2002 False Color Infrared aerial photography, 1:12000 scale Geospatial_Data_Presentation_Form: aerial photography Type_of_Source_Media: color ir aerial transparencies Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 200204 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: photos Source_Contribution: Aerial view of Valley Forge NHP Process_Step: Process_Description: Thematic Accuracy Assessment Field Methods (from the cross-referenced final report) Thematic accuracy assessment has several objectives including to assess the data's suitability for a particular application, to inform the map producers to learn more about data errors and improve the mapping process, and to conform to production standards. Accuracy assessment (AA) sampling design followed the guidelines provided in the NBS/NPS Vegetation Mapping Program (The Nature Conservancy 1994) manuals with respect to the number of AA points sampled and their distribution across park polygons. The sampling design called for 308 points across 24 polygon types during the 2001 field season. Natural and anthropogenic polygon types were included in the AA. AA sampling coordinates were selected by generating random points within the minimum and maximum easting and northing UTM coordinates of the park's extent. Points within 30 m of a polygon border were eliminated to avoid sampling within ecotones. If two or more points still remained in a polygon, one point was randomly chosen and the others discarded. In several of the larger polygons up to six AA points were selected. In the case of some smaller polygons, additional random point selection was required before a random point fell into those polygons. Also, in some polygons it was not possible to locate an AA point 30 m from a border, in which case the AA point was manually located equidistant from polygon borders. AA points were located in the field using a Garmin III Plus GPS unit. Data collection included accuracy assessment plot number and GPS location information, vegetation type at the AA point, vegetation type(s) within 50 m of the AA point, dominant species by strata, canopy closure, and rationale for classification. This data is stored in the PLOTS database (MS Aceess). Vegetation associations were identified using the vegetation key developed for the park. AA results were analyzed using a sample misclassification matrix. Overall accuracy, Kappa index and 90 % confidence intervals were calculated as described in the Accuracy Assessment Procedures-USGS/NPS Vegetation Mapping Program manual (The Nature Conservancy 1994). Process_Date: 2001 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Greg Podniesinski Contact_Organization: Pennsylvania Science Office of the Nature Conservancy Contact_Position: Ecologist Contact_Address: Address_Type: mailing address Address: 208 Airport Road City: Middletwon State_or_Province: Pennsylvania Postal_Code: 17057 Country: United States Contact_Voice_Telephone: (717) 948-3842 Contact_Electronic_Mail_Address: c-gpodnies@state.pa.us Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 308 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: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -75.000000 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: 0.000008 Ordinate_Resolution: 0.000008 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 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: VAFO_VEG_AA_2005 Entity_Type_Definition: Accuracy Assessment sample plot locations for Valley Forge Entity_Type_Definition_Source: PSO-TNCNational Historic Site Attribute: Attribute_Label: FID 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: AA_OBS_ID Attribute_Definition: Unique ID that relates this spatial data layer to the AA Observations table in the PLOTS database. Attribute_Definition_Source: NPS Attribute_Domain_Values: Unrepresentable_Domain: All IDs are prefixed with "VAFO" so an example ID is "VAFO.1" Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS BRD Center for Biological Informatics 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/vafo/index.html Access_Instructions: Internet Access Fees: None Metadata_Reference_Information: Metadata_Date: 20050722 Metadata_Review_Date: 20100616 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS BRD Center for Biological Informatics 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