2012 Coastal Rhode Island DMC Imagery

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

Email: coastal.info@noaa.gov

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.

11943

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.

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.

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

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.

https://coast.noaa.gov/dataviewer. This data set is dynamically generated based on user-specified parameters.;

None

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.

None

None

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

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.

Cloud Cover: 0

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.

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.