49479 2008_northcarolina_DMC Data Set Published / External 49403 Imagery - partner (no harvest) Project Completed 2008 Submerged aquatic vegetation (SAV) is a term used to describe a variety of estuarine and marine plants, including sea grasses. SAV are an important habitat for migratory birds, particularly wintering waterfowl, and many fish species. SAV can also be used as an indicator of estuarine ecosystem health because of their sensitivity to degraded water quality. Orthophotography was flown in coastal regions of North Carolina and southeastern Virginia in an effort to establish long term mapping and monitoring of SAV habitat in these areas. 12054 Theme ISO 19115 Topic Category imageryBaseMapsEarthCover Theme 4 band orthophoto Theme DOQQ Ortho Theme Remotely Sensed Imagery/Photos Theme image map Theme orthoimage Theme orthophoto Theme rectified image Office for Coastal Management Charleston SC Data Set Unknown raster format data 4 band orthoimagery is comprised of blue, green, red , and infrared channels. Each image pixel is assigned a triplet of numeric values, one for each color band. Numeric values range from 0 to 255. Areas where data is incomplete due to lack of full image coverage are represented with the numeric value of 0. U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA. Users must assume responsibility to determine the usability of these data. Aero-Metric, INC Data Steward 2008 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2008 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2008 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2008 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -78.628138 -75.317003 36.853007 33.758208 Range 2007-10-12 2008-05-27 Yes Unclassified All orthophotography is the property of NOAA Office for Coastal Management and NCDENR All orthophotography is the property of NOAA Office for Coastal Management and NCDENR. https://coastalimagery.blob.core.windows.net/digitalcoast/CoastalNC_2008_396/index.html Bulk Download Simple download of data files. https://coast.noaa.gov/digitalcoast/ Online Resource 2016-05-23 Date that the source FGDC record was last modified. 2017-11-14 Converted from FGDC (Federal Geographic Data Committee) CSDGM (Content Standard for Digital Geospatial Metadata) (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2018-02-08 Partial upload of Positional Accuracy fields only. 2018-03-13 Partial upload to move data access links to Distribution Info. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850 The spatial accuracy of the georeferenced imagery at the 95% confidence level, computed in accordance with the FGDC National Standard for Spatial Data Accuracy (NSSDA), shall be 3 m or better. Surveyed orthophoto checkpoints were used to independently measure RMSE values and compute the horizontal accuracy values.; Quantitative Value: 2.378 meters, Test that produced the value: RMSExy should be 4.08 meters or less. RMSEr should be 5.78 meters or less. ACCURACY r should be 3 meters or less at the 95% confidence level. Accuracy values measured from 25 surveyed checkpoints provide the following horizontal accuracy results. RMSEx=.930 meters, RMSEy=.957 meters RMSEr=1.374 meters ACCURACYr=2.378 meters Orthophotos are visually verified for completeness against the DOQQ tile grid. This ensures all files are spatially validated and there are no voids or edge-matching issues between tiles. Data covers areas identified by NOAA Office for Coastal Management and NCDENR. Orthophotos were tiled to the standard USGS DOQQ grid, with a small (~100 m) buffer produced with each tile to prevent gaps in coverage. Compliance with the accuracy standard was ensured by the collection of photo identifiable GPS ground control after the acquisition of aerial imagery. DEM 2008-01-01 Discrete 2007 Used to provide ground elevations for orthorectification process. | Type of Source Media: external hard drive North Carolina Aerotriangulation 2008-01-01 Discrete 2008 Used to provide photo exterior orientations for orthorectification process. | Type of Source Media: external hard drive North Carolina ground control 2008-01-01 Range 2007-10-12 2008-05-27 Dewberry 's Raleigh, North Carolina office acquired photo identifiable ground control points during the acquisition of aerial imagery. The ground control points were established under the guidance of Buddy Lee, a Professional Land Surveyor in the State of North Carolina. | Type of Source Media: external hard drive North Carolina raw DMC imagery 2008-01-01 Range 2007-10-12 2008-05-27 1200 Source imagery for orthophoto production. | Type of Source Media: digital tape media 1 The photography was captured by a Z/I DMC (Digital Modular Camera) system at 24,000' AMT (Above Mean Terrain). The photography was captured over 2 flying seasons. Flight lines 38, 39, 41, 42, 43, 44 and 45 were captured on 10/12/2007. Flight lines 33, 34, 35, 36, 37, 51, 52, 53, 54, 55, 56, 58, 59, 60 and 61 were captured on 10/13/2007. Flight lines 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 were captured on 10/14/2007. Flight lines 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 and 32 were captured on 10/15/2007. Flight lines 31, 40, 46, 47, 48, 49, 50 and 57 were captured on 05/27/2008. The DMC images were aerotriangulated to support digital ortho image production for the coast of North Carolina and Southeastern Virginia. Airborne GPS and ground check point data was provided by AERO-METRIC, Inc. The project was referenced to the North American Datum of 1983 (NAD83) with the 2007 NSRS Adjustment, State Plane Coordinate System 1983, North Carolina horizontally and to the North American Vertical Datum of 1988 (NAVD88) vertically. Units were in Meters. The DMC 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 checkpoints were manually measured on the imagery. These ground checkpoints were included in the aerotriangulation adjustments as unconstrained points for absolute ground location verification. Rectification was done using the aerotriangulation data, raw DMC images, and DEM data provided by the North Carolina Floodplain Mapping Program (NCFMP). The DEM data was developed using LiDAR technology for specific floodplain mapping applications across the entire State of North Carolina. The LiDAR data was gridded to a 20 meter raster Digital Elevation Model (DEM). These rectified images were used to draw seamlines. The 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. To help with SAV interpretation, individual orthophoto frames, named by flightline and frame, were delivered with the mosaicked orthophotos corresponding to the USGS DOQQ tile grid. Dewberry performed an independent QC of the imagery. Horizontal Accuracy was determined by comparing the coordinates of surveyed photo identifiable points to the coordinates of those points from the orthoimagery. A qualitative review of the orthoimagery was also performed to ensure the dataset was free of major discrepancies or issues such as cloud clover, mis-aligned bands, voids, water glint, and whitecaps and to ensure the dataset met the projects requirements and needs. 2008-01-01T00:00:00 gov.noaa.nmfs.inport:49479 Anne Ball 2017-11-15T15:15:03 Kirk Waters 2024-01-11T11:52:20 2024-01-11 OCM Partners OCMP 1002 Public No No 2018-03-13 1 Year 2019-03-13