Metadata: Identification_Information: Citation: Citation_Information: Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division Publication_Date: 20100330 Title: 2008 Aerial Photography of Potomac River, Maryland Geospatial_Data_Presentation_Form: remote-sensing image Publication_Information: Publication_Place: Silver Spring, MD Publisher: NOAA's Ocean Service, National Geodetic Survey (NGS) Online_Linkage: http://www.csc.noaa.gov/digitalcoast Description: Abstract: The images were acquired at a 1:30,000 scale. Images have been ortho-rectified and mosaiced to produce a seamless data set. Purpose: This imagery was orthorectified by Aero-metric to conform to the specifications set forth by NOAA for production of orthophotos in Contract Number DG133C06CO0055, Task Order Number T0007. Ortho-rectified mosaic tiles are not intended for mapping, charting or navigation. Supplemental_Information: Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images to ensure complete coverage. Source imagery is cloud free. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080903 Ending_Date: 20090224 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -77.520675 East_Bounding_Coordinate: -76.135996 North_Bounding_Coordinate: 39.013946 South_Bounding_Coordinate: 37.761007 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: aerial Theme_Keyword: photography Theme_Keyword: shoreline Theme_Keyword: coastal Theme_Keyword: digital orthophotography Theme_Keyword: mosaic Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: NOS Data Explorer Topic Category Theme_Keyword: Remotely Sensed Imagery/Photography Place: Place_Keyword_Thesaurus: None Place_Keyword: Maryland Place_Keyword: Virginia Place_Keyword: Potomac River Access_Constraints: None Use_Constraints: We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these photos in a report, publication, or presentation. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division Contact_Position: Chief, Remote Sensing Division Contact_Address: Address_Type: mailing and physical Address: 1315 East West Highway, N/NGS3 Address: SSMC-3 8142 City: Silver Spring State_or_Province: MD Postal_Code: 20910 Country: USA Contact_Voice_Telephone: 301-713-2663 Data_Quality_Information: Logical_Consistency_Report: The ortho-rectified tiles are visually inspected for image quality and spot check for gross horizontal positional accuracy blunders with USGS Digital Orthophoto Quadrangles. Completeness_Report: The source imagery of the ortho-rectified mosaic tiles are acquired at a higher resolution images than the 1.0 meter ortho-rectified mosaic tiles product. The extent of image coverage is limited to the acquired flight lines which were planned to to map the shoreline and therefore may not include all areas within the bounding coordinates. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The horizontal accuracy of the orthorectified images is mainly determined by the quality of the DEM. The elevation data was from the USGS National Elevation Data dataset. Ground control points were measured in the ortho images and recorded in a spreadsheet which calculated the RMSE and NSSDA reporting accuracy. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 0.95 Horizontal_Positional_Accuracy_Explanation: These data are accurate to within 0.95 meters with a 95% circular error confidence level. Lineage: Process_Step: Process_Description: The digital images were aerotriangulated to support digital ortho image production for the Potomac River Shoreline project area. The project was referenced to the North American Datum of 1983 (NAD83), UTM Coordinate System, Zone 18 horizontally and to the North American Vertical Datum of 1988 (NAVD88) vertically. Units were in meters. The digital images, ABGPS data, and ground check point data were used as inputs to the Zeiss/Intergraph ImageStation Automatic Triangulation (ISAT) softcopy program. ISAT correlated image points and aerotriangulated the block of images to create exposure station exterior orientations. All ground points were manually measured on the imagery. These points were included in the aerotriangulation adjustments for absolute ground location verification. The scale of the aerial photos was 1:30,000. The photography was exposed on 20080903, 20080915, 20081031, 20090221, and 20090224. Rectification was done using the aerotriangulation data, raw DMC images, and 10 meter NED data. These rectified images were used to draw seamlines. The images were then dodged. The dodged rectified images were mosaicked, balanced, and cut into final image sheets. The final sheets were viewed and artifacts were removed as well as other edits performed. Process_Date: 20091101 Cloud_Cover: Unknown Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 5008 Column_Count: 5008 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: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -75 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: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: NAD83 Ellipsoid_Name: GRS80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.2572221 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), NOAA Coastal Services Center Contact_Position: Clearinghouse Manager Contact_Address: Address_Type: mailing and physical Address: 2234 South Hobson Avenue City: Charleston State_or_Province: SC Postal_Code: 29405-2413 Country: USA Contact_Voice_Telephone: (843)740-1210 Contact_Facsimile_Telephone: (843)740-1224 Contact_Electronic_Mail_Address: clearinghouse@noaa.gov Hours_of_Service: Monday-Friday, 8-5 EST Resource_Description: Downloadable Data Distribution_Liability: These photographs were obtained for use by NGS during the course of its development of potential final products to fulfill its statutory mission. Although NGS is making these photographs available to others who may find the photographs of value, NGS does not warrant, endorse, or recommend the use of these photographs for any given purpose. NGS is providing these photographs "as is," and NGS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will NGS be liable to you or any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.csc.noaa.gov/digitalcoast Fees: None Metadata_Reference_Information: Metadata_Date: 20100330 Metadata_Review_Date: 20100413 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division Contact_Position: Chief, Remote Sensing Division Contact_Address: Address_Type: mailing and physical Address: 1315 East West Highway, N/NGS3 Address: SSMC-3 8142 City: Silver Spring State_or_Province: MD Postal_Code: 20910 Country: USA Contact_Voice_Telephone: 301-713-2663 Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.ncddc.noaa.gov/metadataresource/metadata-references/files/ncddcmdprofile_v2.pdf Profile_Name: Content Specification for Metadata in the National Coastal Data Development Center's Data Catalog Version 2.0 Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile