2016 NOAA NGS Ortho-rectified Mosaic of Marthas Vineyard and Nantucket Islands, MA

This data set contains ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative. The source imagery was acquired from 20161030 - 20161123 with an Ultracam LP. The original images were acquired at a higher resolution to support the final ortho-rectified mosaic.

Photos were acquired by Leading Edge Geomatics in order to generate ortho-rectified mosaic tiles. These are ancillary products of NOAA's Coastal Mapping Program (CMP), created through a wider Integrated Ocean and Coastal Mapping initiative to increase support for multiple uses of the data.

The ground sample distance (GSD) for each pixel is 0.25 m. The imagery was taken within 25% of the mean range of tide around MLLW.

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 National Geodetic Survey, the Office for Coastal Management, or its partners.

Data is available online for custom downloads

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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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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.

The aerotriangulation accuracy of the data is plus or minus 0.1 m at the 95% confidence circle for Marthas Vinyeard and 0.2 m at the 95% confidence circle for Nantucket Island.

The horizontal accuracy statement reported in the analysis of results is based on the predicted circular horizontal accuracy of adjusted points in the aerotriangulation solution. This circular accuracy equals the radius of the 95% confidence circle as calculated from the horizontal (x and y) root-mean-square (RMS) values of the standard deviations for all triangulated ground points (17,543 total points), rounded to the nearest tenth of a meter.