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Short Citation:
Office for Coastal Management, 2023: 2012 Coastal Rhode Island DMC Imagery,

Item Identification

Title: 2012 Coastal Rhode Island DMC Imagery
Short Name: 2012_naragansett_dmc
Status: Completed
Publication Date: 2012-10-11

Data set contains 5000 by 5000 feet digital orthophotography mosaics. The digital orthophotos in this series have a nominal ground resolution of 0.5 meters. The digital orthophoto mosaics are four band, 12-bit GeoTIFFs and are color balanced to be uniform while still maintaining as much of the original color and appearance as practical. The source imagery was flown on June 28 and 30, 2012 with a Z/I DMC camera. The primary project area includes the entire shoreline of Rhode Island including the coastal ponds or lagoons that are found on the south shore. The shoreline of Block Island is also included in this project. This area includes approximately 943 square kilometers of intertidal and sub tidal habitats.

Original contact information:

Contact Org: NOAA Office for Coastal Management

Phone: 843-740-1202



Conservation and management efforts linking marine and terrestrial environments are currently hampered by the relative lack of data for estuarine and marine areas in comparison to terrestrial areas. The prioritization process identified the need to acquire digital area imagery within the study area. The coastal waters of Rhode Island including Narragansett Bay, coastal ponds, and sounds of Rhode Island and Block Island are the economic, commercial, and recreational lifeline of the state. Most aerial imagery collected for the state focus on the terrestrial part of the state while ignoring the water. This project collected imagery that maximizes the potential to delineate of coastal, estuarine, and marine features. This project collected imagery that will aid in the long-term management and provide a framework for conservation and management across the land-sea interface. These efforts provide important and replicable data and an information framework for ecosystem-based coastal and marine conservation planning and implementation that can serve as a model for other New England estuaries.



Supplemental Information:

Environmental conditions of acquisition: * Turbidity: Imagery was acquired when turbidity was low, not immediately following heavy rains or persistent strong winds. * Tidal Stage: Imagery was acquired within two hours on either side of a low tide. * Wind and Surface Waves: No wind or waves were optimal for imagery acquisition. Low wind under 10 mph was also acceptable. * Sun Angle: A sun angle between 20 and 60 degrees were optimal. Solar glint or glare on the imagery is minimal. * Cloud and Haze: Clouds, cloud shadows and haze which obstruct benthic habitat are not permitted.


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category imageryBaseMapsEarthCover
None aerial
None coastal
None digital orthophotography
None mosaic
None orthophoto
None photograph
None rectified image
None shoreline

Spatial Keywords

Thesaurus Keyword
None Block Island
None Coastal Zone
None Narragansett Bay
None Rhode Island

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: Image (digital)
Entity Attribute Overview:

Orthophoto radiometric resolution of the four band image composites is 12-bit, with a 0.5 m pixel (1.64042 feet). The horizontal spatial accuracy of the imagery is within +/- 2 meters CE95 of position on the ground. Imagery was processed to remove atmospheric effects such as haze and to highlight the spectral response of submerged areas. The imagery has a minimal exposure variation between adjacent flight lines. The 4 band imagery is tiled and named according to the existing USGS digital ortho quarter quad boundaries in GeoTIFF format. The imagery is delivered in Rhode Island State Plane (ft) NAD1983 coordinate system.

Entity Attribute Detail Citation:

Contract EA133C11CQ0009, Order No. T007, Requisition/Reference No. NCNP0000-11-03351. Statement of Work: Benthic Habitat Data Collection, Coastal Waters of Rhode Island.

Distribution Liability:

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 for NOAA by Photo Science, Inc.

Support Roles

Data Steward

CC ID: 665726
Date Effective From: 2012-10-11
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 665728
Date Effective From: 2012-10-11
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 665729
Date Effective From: 2012-10-11
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 665727
Date Effective From: 2012-10-11
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 665732
W° Bound: -71.967032
E° Bound: -71.035851
N° Bound: 41.86549
S° Bound: 41.083201

Extent Group 1 / Time Frame 1

CC ID: 665731
Time Frame Type: Range
Start: 2012-06-28
End: 2012-06-30

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Access Information

Security Class: Unclassified
Data Access Procedure: This data set is dynamically generated based on user-specified parameters.;

Data Access Constraints:


Data Use Constraints:

Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. We do request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these photos in a report, publication, or presentation.

Metadata Access Constraints:


Metadata Use Constraints:


Distribution Information

Distribution 1

CC ID: 739922
Download URL:
File Name: Customized Download

Create custom data files by choosing area, map projection, file format, etc.

Distribution 2

CC ID: 739923
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 739925
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 665747
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 665746
Activity Date/Time: 2017-11-14

Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718053
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 739924
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Technical Environment


The data set was created on Windows 7 operating system clients running ZI Imaging's Ortho Pro, ArcGIS, and MicroStation.

Data Quality

Horizontal Positional Accuracy:

The horizontal positional accuracy and the assurance of that accuracy are dependent upon the accuracy of the data inputs to the rectification process. These data inputs include the digital elevation model (DEM), accuracy of control, and methodology used to georeference the imagery that meet NOAA's Coastal Mapping Program standards.; Quantitative Value: 2 meters, Test that produced the value: These data are accurate with a 95% circular error confidence level.

Completeness Measure:

Cloud Cover: 0

Completeness Report:

The extent of image coverage is limited to the study area and acquired flight lines which were planned to map the shoreline and therefore may not include all areas within the bounding coordinates.

Conceptual Consistency:

Imagery was collected with a Z/I DMC camera. Imagery was orthorectified to a USGS DEM using Z/I Intergraph OrthoPro. Seamlines were drawn and then mosaics were also cut using Z/I Intergraph OrthoPro. Mosaics were checked to ensure they were free of artifacts.


Process Steps

Process Step 1

CC ID: 665719

Ortho Rectification Photo Science's digital orthorectification process relies on four primary production data sources including digital aerial imagery, camera calibration data, airborne control, and the existing DEM as described above. Photo Science rectified all of the image frames to minimize the effects of radial displacement and to ensure radiometric consistency. The rectification process employed a bilinear interpolation re-sampling method. Intergraph OrthoPro software was used to accomplish the rectification of the individual frames. Mosaicking was also accomplished using OrthoPro software. Image blocks were processed using two distinct tonal matching functions. Each image was processed to remove any hotspots in the middle of the frame. During the collection of aerial imagery, more light enters the lens from directly below the camera than does from the corners of the frame. Even though filters are designed to minimize this effect, some hotspots still can occur. Additionally, all of the frames underwent a histogram comparison process and then were matched to provide a seamless tone image. Manual seamlines are drawn to avoid feature cuts. During the mosaicking process, seamlines were feathered to provide a smooth transition from one image to another. Photo Science utilized a combined automated / manual methodology for maximum cost efficiency and image quality. Tonal matching was accomplished by comparing pixel values in the overlap area of all images. The software modified the histograms of the individual images to achieve an overall mosaic, which will had a uniform tone throughout the images.

Process Date/Time: 2012-01-01 00:00:00

Catalog Details

Catalog Item ID: 49497
GUID: gov.noaa.nmfs.inport:49497
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: 2022-02-14
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-02-14
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-02-14