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
2023-10-17T16:12:14
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
17.0
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA
place
Global Change Master Directory (GCMD) Location Keywords
17.0
CAMERAS
instrument
Global Change Master Directory (GCMD) Instrument Keywords
14.9
Airplane > Airplane
platform
Global Change Master Directory (GCMD) Platform Keywords
14.9
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
Georgia
Walton County
place
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
otherRestrictions
Access Constraints: None | 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. | Distribution Liability: Users must assume responsibility to determine the appropriate use of these data. DATA SHOULD NOT BE USED FOR LEGALLY BINDING APPLICATIONS.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
48413
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/48413.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
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://coast.noaa.gov/htdata/raster1/imagery/WaltonGA_2016_5159
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
Quantum Spatial, Inc.
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
Quantum Spatial, Inc.
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
Quantum Spatial, Inc.
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
Walton County, GA