gov.noaa.nmfs.inport:48413 eng UTF8 dataset Office for Coastal Management resourceProvider 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 pointOfContact 2026-04-30T00:00:00 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 2 row 1250 column 1250 point 0 2016 Walton County, Georgia ADS100 4-Band 8 Bit Imagery 2016_walton_ga 2016-09-16 publication NOAA/NMFS/EDM 48413 https://www.fisheries.noaa.gov/inport/item/48413 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/dataregistry WWW:LINK-1.0-http--link Citation URL Online Resource download imageDigital This data set consists of 0.5-foot pixel resolution, natural color orthoimages covering Walton County, Georgia. An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. Each orthoimage provides imagery over a 2,500-foot by 2,500-foot block on the ground. There is no image overlap between adjacent files. The projected coordinate system is Georgia State Plane West (FIPS 1002) feet with a NAD83 datum. A secondary set of GeoTIFF tiles, MrSID tiles, and MrSID mosaic was produced in WGS84 Lat/Long. This data depicts geographic features on the surface of the earth. It was created to provide easily accessible geospatial data which is readily available to enhance the capability of Federal, State, and local emergency responders, as well as storm water management and assessment. Quantum Spatial, Inc. flew and processed the data. completed 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 pointOfContact 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 custodian unknown EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA place Global Change Master Directory (GCMD) Location Keywords 23.3 CAMERAS instrument Global Change Master Directory (GCMD) Instrument Keywords 23.3 Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 23.3 GA US place U.S. Department of Commerce 0.5 foot orthoimage 6 inch orthoimage image map natural color orthophoto orthoimage orthophoto rectified image rectified photograph theme DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Imagery project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: 2016 Walton County, Georgia ADS100 4-Band 8 Bit Imagery [Data Date Range], https://www.fisheries.noaa.gov/inport/item/48413. 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: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that 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 appropriate use of these data. DATA SHOULD NOT BE USED FOR LEGALLY BINDING APPLICATIONS. unclassified grid eng; US imageryBaseMapsEarthCover ArcGIS 10.3; Microsoft Windows 10; Microsoft Office; Intergraph's suite of photogrammetric products including GeoMedia OrthoPro -83.99086636987 -83.50512801377 33.59347276876 33.93060762753 | Currentness: Ground Condition 2016-02-05 2016-02-18 false eng false U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA. IMG - ERDAS Imagine 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/dataregistry/ WWW:LINK-1.0-http--link https://coast.noaa.gov/dataregistry/ Downloadable Data download https://coastalimagery.blob.core.windows.net/digitalcoast/WaltonGA_2016_5159/index.html WWW:LINK-1.0-http--link Bulk Download Simple download of data files. download https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=5159 WWW:LINK-1.0-http--link Customized Download Create custom data files by choosing area, map projection, file format, etc. download dataset Accuracy Radiometry is verified by visual inspection of the digital orthophoto. Slight systematic radiometric differences may exist between adjacent orthoimage files; these are due primarily to differences in source image capture dates and sun angles along flight lines. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching. Horizontal Positional Accuracy Please see the Accuracy Analyst report for a detailed report showing the 18 control points measured to produce the NSSDA value of 0.685 feet. This meets the required value of +/- 2.5 feet. ; Quantitative Value: 0.685 meters, Test that produced the value: NSSDA in feet. Completeness Report 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. Photography was flown during leaf-off in deciduous vegetation regions. Conceptual Consistency 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 not corrected unless the overall displacement exceeds one meter. Digital aerial imagery was obtained using a large format Leica ADS 100 camera system equipped with Airborne GPS/IMU covering the AOI. A total of 64 lines were collected in early 2016 in multi-spectral (RGB and NIR) 16 bits per band format. The imagery was acquired with a 62.5 mm focal length at an altitude above mean terrain of 5,965' to yield a pixel resolution of 0.5-feet suitable for photogrammetric mapping and orthophoto production. The imagery was collected during leaf off conditions in early 2016 under conditions free from clouds and cloud shadows, smoke, fog, haze, light streaks, snow, ice on water bodies, foliage, flooding, and excessive soil moisture. The sun angle threshold was 30 degrees. The imagery consisted of blue, green, red, and near infrared bands. 2016-01-01T00:00:00 Ground based photo control points were established throughout the area of interest using a combination of conventional and GPS survey methods in order to support softcopy aerotriangulation and photogrammetric mapping meeting the accuracies specified in this Scope of Work. This control supplemented the exposure station control obtained from the onboard Airborne Global Positioning System (ABGPS) and Inertial Measurement Unit (IMU). Photo control points established for this project have a combined local and network accuracy at 95% confidence of less than or equal to five (5) centimeters horizontally and vertically as determined by the residuals of the network adjustment. 2016-01-01T00:00:00 Utilizing all four bands [blue (B), green (G), red(R) and near infrared (IR)], digital orthorectification was performed using bilinear interpolation algorithms resulting in a spatial and radiometric transformation of the digital image from line/sample space into State Plane Zone 1002 Georgia West. The interior and exterior orientation parameters were used to project each pixel into the ground coordinate system, while the ortho grade DEM/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 tonally balanced to produce a uniform contrast and tone across the entire project. The individual overlapping orthophoto frames were mosaicked together and the final tiles were extracted from the image set to a 2,500 x 2,500 foot tiling scheme consisting of 1,481 individual ortho tiles. Delivery included digital ortho photos at a 0.5-foot pixel ground sample distance in 8 bit, 4 band (RGB and NIR) uncompressed GeoTIFF and MrSID Gen 3 (compression 40:1) files. The ortho photos meet a horizontal accuracy of +/- 2.5-feet or less at 95% confidence level when compared to higher accuracy check points based on NSSDA testing standards. 2016-01-01T00:00:00 A single mosaic of the 4-band orthoimagery was produced using LizardTech GeoExpress software version 9.1. Mosaics were produced in MrSID Generation 3 format at a compression ratio of 40:1. 2016-01-01T00:00:00 Source Contribution: Softcopy aerotriangulation was performed utilizing the airborne GPS/IMU data, GPS ground control and image coordinate measurements allowing the direct computation of the exterior orientation parameters for each image of the project. | Source Geospatial Form: model | Type of Source Media: online Aerotriangulation 2016 Source Contribution: Quantum Spatial performed a geodetic control survey in support of a digital orthophoto production project covering the AOI. The survey was done using the Global Positioning System (GPS). A combination of photo identifiable objects and pre-flight targeting was used to provide ground based photo control. Photo control points have a combined local and network accuracy at 95% confidence of less than or equal to five (5) centimeters horizontally and vertically as determined by the residuals of the network adjustment. | Source Geospatial Form: Model | Type of Source Media: CD-ROM GPS Photo Control Survey for Georgia Counties: Morgan, Oconee, Newton, and Walton 2016-01-01 publication 2016 Source Contribution: Aerial imagery was acquired using a Leica ADS 100 camera with a flight design that included a total of 64 flight lines for the entire project area. Aerial imagery was supplemented with the simultaneous acquisition of airborne GPS/IMU data, which captured the ground coordinate for the nadir point of each photograph. Aerial imagery was exposed at an altitude of 5,965' above mean terrain for 0.5-foot imagery. | Source Geospatial Form: remote-sensing image | Type of Source Media: external hard drive Georeferenced Single Frames 2016-01-01 publication 2016-02-05 2016-02-18 Source Contribution: A compilation of topographic land form elevation datasets developed through the use of existing elevation datasets from various sources for use in developing digital ortho imagery. The surfaces were created from LiDAR data collected from previous projects. | Source Geospatial Form: model | Type of Source Media: online LiDAR DEM