Identification_Information: Citation: Citation_Information: Originator: North Carolina State University, Center for Earth Observation Publication_Date: 20010622 Title: Color Infrared Orthorectified Photomosaic Leaf-off for Appomattox Court House National Historical Park Vegetation Mapping Project Edition: first Geospatial_Data_Presentation_Form: remote-sensing image Online_Linkage: http://biology.usgs.gov/npsveg/ftp/vegmapping/apco/apcoortho.zip Description: Abstract: Orthorectified color infrared ERDAS IMAGINE image of Appomattox Courthouse National Historical Park and surrounding parcels. Produced from 42 color infrared photos taken December 18, 2000 in leaf-off conditions. Overall positional accuracy is 1.475 meters (Euclidean distance). This meets the Class 1 NMAS map accuracy standard. Purpose: The dataset was created for Appomattox Courthouse National Historical Park for use in natural resource management. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20001218 Time_of_Day: 1300 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Description_of_Geographic_Extent: Appomattox Courthouse National Historical Park and environs Bounding_Coordinates: West_Bounding_Coordinate: -78.8312 East_Bounding_Coordinate: -78.7715 North_Bounding_Coordinate: 37.4009 South_Bounding_Coordinate: 37.3569 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: IMAGINE Theme_Keyword: ERDAS Orthobase Theme_Keyword: Color Infrared Theme_Keyword: mosaic Theme_Keyword: aerial photo Theme_Keyword: photo mosaic Theme_Keyword: digital photogrammetry Theme_Keyword: softcopy photogrammetry Place: Place_Keyword_Thesaurus: none Place_Keyword: Virginia Place_Keyword: Historical Park Place_Keyword: National Park Place_Keyword: Appomattox Court House National Historical Park Place_Keyword: Appomattox Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: 2000 Temporal_Keyword: leaf-off Temporal_Keyword: December Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Natural Resources Specialist Contact_Organization: Appomattox Courthouse National Historical Park Contact_Position: Natural Resources Specialist Contact_Address: Address_Type: mailing address Address: Natural Resources Specialist Appomattox Courthouse National Historical Park Hwy. 24, P.O. Box 218 City: Appomattox State_or_Province: Virginia Postal_Code: 24522 Country: USA Contact_Voice_Telephone: (804) 352-8987 ext. 28 Contact_Facsimile_Telephone: (804) 352-8330 Contact_Electronic_Mail_Address: Unknown Data_Set_Credit: Melani Harrell, NCSU-CEO Native_Data_Set_Environment: ESRI ArcInfo 7.2.1, ERDAS Orthobase 8.4. Data_Quality_Information: Logical_Consistency_Report: none Completeness_Report: Appomattox Courthouse National Historical Park Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Overall positional accuracy is 1.475 meters (Euclidean distance). This meets the Class 1 NMAS map accuracy standard. Horizontal accuracy was found by assessing 39 points spread throughout the orthorectified image area. These points were identified on the basemap and then were found in the field where their coordinates were taken using a Trimble ProXRS with real time data correction. The field coordinates were then compared to the coordinates from the basemap in ArcView 3.2 to determine positional accuracy. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Air Photographics, Inc Publication_Date: Unpublished Material Title: Aerial photographs of the Appomattox Courthouse National Historical Park Edition: first Geospatial_Data_Presentation_Form: remotely-sensed image Source_Scale_Denominator: 6000 Type_of_Source_Media: color infrared aerial photographs Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20001218 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: aerial photos Source_Contribution: Aerial view of Appomattox Courthouse National Historical Park Process_Step: Process_Description: The aerial photos (42 total) were used to create an orthorectified mosaic using ERDAS IMAGINE and ERDAS Orthobase. The photos were scanned at 600 dpi and imported into IMAGINE. They were then orthorectofied using four USGS DOQQ's and a USGS National Seamless Elevation DEM as reference. The DEM was resampled from 30 meters to 10 meters using ArcInfo 7.2.1. Each photo was entered into an Orthobase photo block and registered to its interior orientation. Tie points were applied and automatic tie points generated and control points were applied in the Orthobase Point Measurement Tool. Once a successful triangulation solution was reached in Orthobase, the orthorectified images were then mosaiced within IMAGINE to form one seamless basemap image for Appomattox Courthouse National Historical Park. Process_Date: 200104 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: North Carolina State University, Center for Earth Observation Contact_Address: Address_Type: mailing address Address: NCSU Campus Box 7106 City: Raleigh State_or_Province: NC Postal_Code: 27695-7106 Country: USA Contact_Voice_Telephone: 919-515-3430 Contact_Facsimile_Telephone: 919-515-3439 Hours_of_Service: 9:30 am - 6:00 pm Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 18095 Column_Count: 19702 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 17 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -81.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.173425 Ordinate_Resolution: 0.173425 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: Overview_Description: Entity_and_Attribute_Overview: Dataset consists of a raster 3 band color image, each pixel value is between 0-255. Entity_and_Attribute_Detail_Citation: none 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 Resource_Description: Orthorectified 3 band color raster image of Appomattox Courthouse National Historical Park. 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/apco/index.html Access_Instructions: Internet Access Fees: None Metadata_Reference_Information: Metadata_Date: 20010622 Metadata_Review_Date: 20100512 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