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Short Citation:
OCM Partners, 2022: 2008 OrthoImagery of Coastal North Carolina, https://www.fisheries.noaa.gov/inport/item/49479.

Item Identification

Title: 2008 OrthoImagery of Coastal North Carolina
Short Name: 2008_northcarolina_DMC
Status: Completed
Publication Date: 2008
Abstract:

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.

Purpose:

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.

Notes:

12054

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
ISO 19115 Topic Category imageryBaseMapsEarthCover
None 4 band orthophoto
None DOQQ Ortho
None image map
None orthoimage
None orthophoto
None rectified image
None Remotely Sensed Imagery/Photos

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None North Carolina
None Southeastern Virginia
None US

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: Unknown
Data Presentation Form: raster format data
Entity Attribute Overview:

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.

Entity Attribute Detail Citation:

U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA.

Distribution Liability:

Users must assume responsibility to determine the usability of these data.

Data Set Credit: Aero-Metric, INC

Support Roles

Data Steward

CC ID: 665090
Date Effective From: 2008
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

Distributor

CC ID: 665092
Date Effective From: 2008
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

CC ID: 665093
Date Effective From: 2008
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

Point of Contact

CC ID: 665091
Date Effective From: 2008
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

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 665096
W° Bound: -78.628138
E° Bound: -75.317003
N° Bound: 36.853007
S° Bound: 33.758208

Extent Group 1 / Time Frame 1

CC ID: 665095
Time Frame Type: Range
Start: 2007-10-12
End: 2008-05-27

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Access Information

Security Class: Unclassified
Data Access Constraints:

All orthophotography is the property of NOAA Office for Coastal Management and NCDENR

Data Use Constraints:

All orthophotography is the property of NOAA Office for Coastal Management and NCDENR.

Distribution Information

Distribution 1

CC ID: 739857
Download URL: https://coast.noaa.gov/htdata/raster1/imagery/CoastalNC_2008_396
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 739859
URL: https://coast.noaa.gov/digitalcoast/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 665109
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 665108
Activity Date/Time: 2017-11-14
Description:

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.

Activity Log 3

CC ID: 718027
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 739858
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850

Data Quality

Horizontal Positional Accuracy:

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

Completeness Report:

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.

Conceptual Consistency:

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.

Lineage

Sources

DEM

CC ID: 665081
Contact Name: North Carolina Floodplain Mapping Program (NCFMP). DEM data can be downloaded at: http://floodmaps.nc.gov/fmis/Download_LIDAR.aspx
Publish Date: 2008-01-01
Extent Type: Discrete
Extent Start Date/Time: 2007
Source Contribution:

Used to provide ground elevations for orthorectification process. | Type of Source Media: external hard drive

North Carolina Aerotriangulation

CC ID: 665082
Contact Name: AT
Publish Date: 2008-01-01
Extent Type: Discrete
Extent Start Date/Time: 2008
Source Contribution:

Used to provide photo exterior orientations for orthorectification process. | Type of Source Media: external hard drive

North Carolina ground control

CC ID: 665083
Contact Name: Dewberry and Davis LLC
Publish Date: 2008-01-01
Extent Type: Range
Extent Start Date/Time: 2007-10-12
Extent End Date/Time: 2008-05-27
Source Contribution:

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

CC ID: 665080
Contact Name: Aero-Metric, Inc.
Publish Date: 2008-01-01
Extent Type: Range
Extent Start Date/Time: 2007-10-12
Extent End Date/Time: 2008-05-27
Scale Denominator: 1200
Source Contribution:

Source imagery for orthophoto production. | Type of Source Media: digital tape media

Process Steps

Process Step 1

CC ID: 665084
Description:

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.

Process Date/Time: 2008-01-01 00:00:00

Catalog Details

Catalog Item ID: 49479
GUID: gov.noaa.nmfs.inport:49479
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:15+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2018-03-13
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-03-13
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-03-13