2019 NOAA NGS 4-band Ortho-rectified Mosaic of Chesapeake Bay (Gwynn to Newport News, VA)
Data Set (DS) | National Geodetic Survey (NGS)GUID: gov.noaa.nmfs.inport:64516 | Updated: January 11, 2024 | Published / External
Summary
Short Citation
National Geodetic Survey, 2024: 2019 NOAA NGS 4-band Ortho-rectified Mosaic of Chesapeake Bay (Gwynn to Newport News, VA), https://www.fisheries.noaa.gov/inport/item/64516.
Full Citation Examples
This orthoimagery data set includes 0.3 meter 8-bit 4-band (RGB-IR) digital orthoimage tiles in GeoTIFF format. Geographic Extent: 7 counties in Maryland, covering approximately 569 total square miles. Dataset Description: The Chesapeake Bay NOAA Option 3 project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at a ground sample distance (GSD) of 0.3 meter. 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 NAD1983 2011 UTM Zone 18N, Meter. Orthoimagery data were delivered in 164 individual 3000 m x 3000 m tiles as 0.3 meter 8-bit 4-band (RGB-IR) orthophoto tiles in GeoTIFF format.
Ground Conditions: Imagery was collected in fall 2018 and spring 2019, while no snow was on the ground and rivers were at or below normal levels. In order to post process the imagery data to meet task order specifications and meet ASPRS horizontal accuracy guidelines, Quantum Spatial, Inc. utilized a total of 3 ground control points to assess the horizontal accuracy of the data.
Distribution Information
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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.
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GeoTIFF
Bulk download of data files in the original coordinate system.
None
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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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.
Controlled Theme Keywords
imageryBaseMapsEarthCover, INFRARED IMAGERY, VISIBLE IMAGERY
Child Items
No Child Items for this record.
Contact Information
Point of Contact
National Geodetic Survey (NGS)
https://geodesy.noaa.gov/
Metadata Contact
National Geodetic Survey (NGS)
https://geodesy.noaa.gov/
Extents
-76.66805555556° W,
-76.20805555556° E,
37.51472222222° N,
37.05166666667° S
2019-04-01
Item Identification
Title: | 2019 NOAA NGS 4-band Ortho-rectified Mosaic of Chesapeake Bay (Gwynn to Newport News, VA) |
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Status: | Completed |
Publication Date: | 2021-04-30 |
Abstract: |
This orthoimagery data set includes 0.3 meter 8-bit 4-band (RGB-IR) digital orthoimage tiles in GeoTIFF format. Geographic Extent: 7 counties in Maryland, covering approximately 569 total square miles. Dataset Description: The Chesapeake Bay NOAA Option 3 project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at a ground sample distance (GSD) of 0.3 meter. 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 NAD1983 2011 UTM Zone 18N, Meter. Orthoimagery data were delivered in 164 individual 3000 m x 3000 m tiles as 0.3 meter 8-bit 4-band (RGB-IR) orthophoto tiles in GeoTIFF format. Ground Conditions: Imagery was collected in fall 2018 and spring 2019, while no snow was on the ground and rivers were at or below normal levels. In order to post process the imagery data to meet task order specifications and meet ASPRS horizontal accuracy guidelines, Quantum Spatial, Inc. utilized a total of 3 ground control points to assess the horizontal accuracy of the data. |
Purpose: |
These data depict geographic features on the surface of the earth. The dataset was created to current imagery data for Maryland. |
Supplemental Information: |
Project VA1901-TB-Imagery |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY
|
ISO 19115 Topic Category |
imageryBaseMapsEarthCover
|
UNCONTROLLED | |
NOS Data Explorer Topic Category | Remotely Sensed Imagery/Photography |
None | aerial |
None | coastal |
None | digital orthophotography |
None | mosaic |
None | orthophoto |
None | photograph |
None | rectified image |
None | shoreline |
Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
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Instrument Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Instrument Keywords |
CAMERAS
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Platform Keywords
Thesaurus | Keyword |
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UNCONTROLLED | |
Global Change Master Directory (GCMD) Platform Keywords | Aircraft > Aircraft |
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Data Set Type: | Imagery |
Maintenance Frequency: | None Planned |
Data Presentation Form: | remote-sensing image |
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 |
Data Set Credit: | This data set was developed by Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division |
Support Roles
Data Steward
Date Effective From: | 2021 |
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Date Effective To: | |
Contact (Organization): | National Geodetic Survey (NGS) |
Address: |
1315 East-West Hwy Silver Spring, MD 20910 |
URL: | https://geodesy.noaa.gov/ |
Distributor
Date Effective From: | 2021 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Metadata Contact
Date Effective From: | 2021 |
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Date Effective To: | |
Contact (Organization): | National Geodetic Survey (NGS) |
Address: |
1315 East-West Hwy Silver Spring, MD 20910 |
URL: | https://geodesy.noaa.gov/ |
Point of Contact
Date Effective From: | 2021 |
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Date Effective To: | |
Contact (Organization): | National Geodetic Survey (NGS) |
Address: |
1315 East-West Hwy Silver Spring, MD 20910 |
URL: | https://geodesy.noaa.gov/ |
Contact Instructions: |
Email: ngs.infocenter@noaa.gov |
Extents
Currentness Reference: | Ground Condition |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -76.66805555556 | |
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E° Bound: | -76.20805555556 | |
N° Bound: | 37.51472222222 | |
S° Bound: | 37.05166666667 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 2019-04-01 |
Spatial Information
Spatial Representation
Representations Used
Vector: | Yes |
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Reference Systems
Reference System 1
Coordinate Reference System |
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Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
Data is available online for custom downloads |
Data Access Constraints: |
None |
Data 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. |
Distribution Information
Distribution 1
Start Date: | 2021 |
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End Date: | Present |
Download URL: | https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=9284 |
Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2021 - Present) |
File Name: | Customized Download |
Description: |
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. |
File Type (Deprecated): | Zip |
Compression: | Zip |
Distribution 2
Start Date: | 2021 |
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End Date: | Present |
Download URL: | https://coastalimagery.blob.core.windows.net/digitalcoast/NewportNewsVA_RGBN_2019_9284/index.html |
Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2021 - Present) |
File Name: | Bulk Download |
Description: |
Bulk download of data files in the original coordinate system. |
File Type (Deprecated): | GeoTIFF |
Distribution Format: | GeoTIFF |
URLs
URL 1
URL: | https://coast.noaa.gov/ |
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Name: | NOAA's Office for Coastal Management (OCM) website |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
Information on the NOAA Office for Coastal Management (OCM) |
URL 2
URL: | https://coast.noaa.gov/dataviewer/ |
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Name: | NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
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. |
Technical Environment
Description: |
OS Independent |
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Data Quality
Horizontal Positional Accuracy: |
The project specifications require that only horizontal accuracy be computed for orthoimagery files. The required accuracy meets or exceeds ASPRS standards. The horizontal accuracy was tested with 3 checkpoints located throughout the project area. These checkpoints were not used in the calibration or post-processing of the imagery data. The checkpoints were distributed throughout the project area and were surveyed using GPS techniques. See survey report for additional survey methodologies. The x and y positions of where the checkpoints fell on the orthoimagery were collected. These values were then compared to the surveyed control point x and y values Qualitative value: Tested 0.154 meters RMSEx. The RMSEx of the imagery was calculated using 3 checkpoints. Tested 0.195 meters RMSEy. The RMSEy of the imagery was calculated using 3 checkpoints. Tested 0.249 meters RMSEr. The RMSEr of the imagery was calculated using 3 checkpoints. |
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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 mosaicking 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. |
Conceptual Consistency: |
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 |
Lineage
Lineage Statement: |
Aerial imagery was acquired using a UltraCam Eagle camera with a flight design that included a total of 10 flight lines. 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 13100 feet above mean terrain. 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. A compilation of topographic land form elevation datasets developed using in-house LiDAR data and data from the National Elevation Dataset for use in developing digital ortho imagery. Quantum Spatial performed a geodetic control survey in support of the digital orthophoto production project. A total of 3 points were used for QC testing. |
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Sources
Acquisition and Processing
Contact Role Type: | Originator |
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Contact Type: | Organization |
Contact Name: | Quantum Spatial, Inc |
Process Steps
Process Step 1
Description: |
Orthophoto Processing: Utilizing all four bands [blue (B), green (G), red (R), and 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 NAD 1983 2011 UTM Zone 18N, Meter. 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 DEM 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 mosaicked together. The ortho photos meet ASPRS horizontal accuracy standards. |
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Process Date/Time: | 2020-01-23 00:00:00 |
Process Contact: | NGS Communications and Outreach Branch |
Phone (Voice): | (301) 713-3242 |
Email Address: | ngs.infocenter@noaa.gov |
Catalog Details
Catalog Item ID: | 64516 |
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GUID: | gov.noaa.nmfs.inport:64516 |
Metadata Record Created By: | Maryellen Sault |
Metadata Record Created: | 2021-04-09 17:24+0000 |
Metadata Record Last Modified By: | Kirk Waters |
Metadata Record Last Modified: | 2024-01-11 12:41+0000 |
Metadata Record Published: | 2024-01-11 |
Owner Org: | NGS |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2021-04-14 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2022-04-14 |