gov.noaa.nmfs.inport:72659 eng UTF8 dataset Imagery National Geodetic Survey resourceProvider National Geodetic Survey 1315 East-West Hwy Silver Spring MD 20910 https://geodesy.noaa.gov/ WWW:LINK-1.0-http--link National Geodetic Survey Website Website listed for National Geodetic Survey information pointOfContact 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::6347 2018 NOAA NGS Ortho-rectified 4 band Mosaic of Lexington Park, MD 2024 creation publication NOAA/NMFS/EDM 72659 https://www.fisheries.noaa.gov/inport/item/72659 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) website Information on the NOAA Office for Coastal Management (OCM) download https://coast.noaa.gov/dataviewer/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. download This orthoimagery data set includes 30-cm 8-bit 4-band (RGBNIR) digital orthomosaics in GeoTIFF format. Geographic Extent: A multipart AOI covering approximately 463 total square miles of Maryland and Virginia along the coastline of the Chesapeake Bay. Dataset Description: The NOAA Chesapeake Bay Topobathy 2018 Orthoimagery Project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at a ground sample distance (GSD) of 30 centimeters. Project specifications are based on the American Society of Photogrammetry and Remote Sensing (ASPRS) standards. The data were developed based on a horizontal projection/datum of NAD83 (2011), UTM Zone 18N, Meters. Imagery data were formatted to 325 individual 3,000-meter x 3,000-meter orthomosaic tiles and 539 uncompressed stereo images. Ground Conditions: Imagery was collected in spring and summer of 2018, while no snow was on the ground and rivers were at or below normal levels. Ortho-rectified mosaic tiles are an ancillary product of NOAA's Coastal Mapping Program (CMP), created through a wider Integrated Ocean and Coastal Mapping initiative to increase support for multiple uses of the data. This data set was developed by NOAA., Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division completed National Geodetic Survey 1315 East-West Hwy Silver Spring MD 20910 https://geodesy.noaa.gov/ WWW:LINK-1.0-http--link National Geodetic Survey Website Website listed for National Geodetic Survey information pointOfContact National Geodetic Survey 1315 East-West Hwy Silver Spring MD 20910 https://geodesy.noaa.gov/ WWW:LINK-1.0-http--link National Geodetic Survey Website Website listed for National Geodetic Survey information custodian notPlanned EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS > BEACHES EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS > SHORELINES EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY theme Global Change Master Directory (GCMD) Science Keywords 17.0 EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS service Global Change Master Directory (GCMD) Service Keywords 17.0 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > VIRGINIA place Global Change Master Directory (GCMD) Location Keywords 20.8 CAMERA > CAMERA instrument Global Change Master Directory (GCMD) Instrument Keywords 17.2 AERIAL PHOTOGRAPHS > AERIAL PHOTOGRAPHS Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 17.2 DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian NGS Imagery project InPort otherRestrictions Cite As: National Geodetic Survey, [Date of Access]: 2018 NOAA NGS Ortho-rectified 4 band Mosaic of Lexington Park, MD [Data Date Range], https://www.fisheries.noaa.gov/inport/item/72659. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. otherRestrictions Distribution Liability: Users must assume responsibility to determine the usability of these data. 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. Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 72659 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ngs/dmp/pdf/72659.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference vector eng; US imageryBaseMapsEarthCover OS Independent -76.78 -76.36 38.07 38.32 | Currentness: Ground Condition 2018-03-18 2018-08-14 The ground sample distance (GSD) for each pixel is 0.30 m. Zip Zip GeoTIFF NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=10140 WWW:LINK-1.0-http--link Customized Download Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base. download https://coastalimagery.blob.core.windows.net/digitalcoast/LexingtonPark_RGBN_2018_10140/index.html WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in the original coordinate system. download dataset Horizontal Positional Accuracy The project specifications require that only horizontal accuracy be computed for orthoimagery files. The required accuracy meets or exceeds the ASPRS Class I Accuracy standards for 1" = 200' maps, derived according to the latest ASPRS standards. The horizontal accuracy was based on the use of the airborne GIS and IMU flown in a process of precise point positioning (PPP). Control was taken from existing orthoimagery, and accuracy was determined relative to the provided orthoimagery. Accuracy has been tested to meet 2 feet(0.6 meter) or better RMSE using ASPRS Class I Accuracy Standards. Tested 0.254 meter RMSEx as defined by the ASPRS Class 1 Accuracy Standards for 1" = 200' maps. Tested 0.142 meter RMSEy as defined by the ASPRS Class 1 Accuracy Standards for 1" = 200' maps Tested 0.291 meter RMSEh as defined by the ASPRS Class 1 Accuracy Standards for 1" = 200' maps. Comparability All GeoTIFF tagged data and image file sizes are validated using commercial GIS software to ensure proper loading before being archived. This validation procedure ensures correct physical format and field values for tagged elements. Seamlines and tile edges are visually inspected. Seamline mismatches are corrected unless the overall displacement is less than one pixel. Completeness Measure 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 mosaicing multiple images to ensure complete coverage. Source imagery is cloud free. Completeness Report The extent of image coverage is limited to the acquired flight lines which were planned to map the shoreline and therefore may not include all areas within the bounding coordinates. Orthophoto Processing: Utilizing all four bands [blue (B), green (G), red(R), and near infrared [NIR]] digital orthorectification was performed using bilinear interpolation algorithms resulting in a spatial and radiometric transformation of the digital image from line/sample space into NAD83 (2011), UTM Zone 18N, Meters. The interior and exterior orientation parameters from the aerotriangulation process were used to project each pixel into the ground coordinate system, while the ortho grade DTM was used to correct for relief displacement. Radiometric correction software and techniques were used to create orthophoto files that minimize the appearance of image seams and without loss of feature signature. Orthophotos are checked for geometric accuracy, image quality, and are tonally balanced to produce a uniform contrast and tone across the entire project. The individual overlapping orthophoto frames were mosaiced together 2018-01-01T00:00:00 National Geodetic Survey processor Acquisition and Processing Quantum Spatial originator