Massachusetts 1:10,000 Coastal Color Orthophoto Images (1994) - MrSID Format
MassGIS

folder coq_coastal_1m_sid (400 files)
filecoq_coastal_1m_sid.dbf 81.99kB
file1cnomans.zip 2.27MB
file1c333846.zip 1.10MB
file1c333842.zip 1.93MB
file1c333838.zip 1.76MB
file1c333834.zip 1.91MB
file1c333830.zip 1.84MB
file1c333826.zip 1.87MB
file1c333822.zip 1.87MB
file1c333818.zip 1.92MB
file1c333778.zip 1.05MB
file1c329858.zip 1.63MB
file1c329854.zip 1.99MB
file1c329850.zip 2.33MB
file1c329846.zip 2.52MB
file1c329842.zip 2.41MB
file1c329838.zip 2.48MB
file1c329834.zip 2.32MB
file1c329830.zip 2.45MB
file1c329826.zip 2.48MB
file1c329822.zip 2.37MB
file1c329818.zip 2.59MB
file1c329814.zip 2.52MB
file1c329810.zip 2.63MB
file1c329786.zip 1.14MB
file1c329782.zip 1.39MB
file1c329778.zip 1.48MB
file1c329774.zip 552.69kB
file1c325866.zip 2.43MB
file1c325862.zip 2.45MB
file1c325858.zip 2.42MB
file1c325854.zip 2.53MB
file1c325850.zip 2.55MB
file1c325846.zip 2.48MB
file1c325842.zip 2.34MB
file1c325838.zip 2.35MB
file1c325834.zip 2.42MB
file1c325830.zip 2.57MB
file1c325826.zip 2.50MB
file1c325822.zip 2.20MB
file1c325818.zip 2.22MB
file1c325814.zip 2.55MB
file1c325810.zip 2.10MB
file1c325794.zip 1.17MB
file1c325790.zip 1.41MB
file1c325786.zip 1.40MB
file1c325782.zip 1.38MB
file1c325778.zip 1.33MB
file1c321866.zip 2.60MB
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Type: Dataset
Tags: MassGIS, orthophotographs

Bibtex:
@article{,
title = {Massachusetts 1:10,000 Coastal Color Orthophoto Images (1994) - MrSID Format},
journal = {},
author = {MassGIS},
year = {},
url = {},
abstract = {Overview

These color coastal orthophotographs were generated through a cooperative effort between the Massachusetts Coastal Zone Management Office, the NOAA Photogrammetry Division and the National Geodetic Survey. The data covers most of the coastal zone region. Digital orthophoto production was provided by Photo Science Inc. of Gaithersburg Maryland. The data set is tiled identically to the MassGIS black and white orthophotos for both the mainland and island regions (398 images; see the Coastal Color Orthophotos Index datalayer description). Additionally, one more image was created for Noman's Land and is not based on the same index.
 Needs Title-coqimg
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Methodology

The color aerial photography was captured in September and October of 1994 by the Photogrammetry Division of NOAA. The scale of the original photography is 1:48,000. Differential airborne GPS was used for control. Approximately 31 flight lines were conducted, with the orientation of the flight lines designed to cover the maximum area of shoreline. Approximately 360 were captured. Approximately 16 ground panels were placed in the field and surveyed.

Aerotriangulation was conducted by the Photogrammetry Division utilizing analytical stereo plotters. The control was processed using 3 block areas: A) North of Boston, B) Boston south including the Elizabeth Islands, and C) Martha?s Vineyard with Nantucket. Control was developed to provide an accuracy that exceeds NMAS of 1:10,000. In large portions of the area, control exceeds the NMAS for 1:7,000.

Diapositives were scanned for a final output resolution of 1.0 meter. Scanning was done to match the diapositives as closely as possible. Bulk radiometric adjustments of the imagery was conducted using Adobe Photoshop "auto levels" to remove the green haze and to stretch the contrast.

Mass point and breakline elevations were created and used in the production. Only mass point elevations are available for the area. Elevation data was developed primarily for the purpose of orthorectification, and not for detailed contouring. Images for Martha's Vineyard and Nantucket were originally georeferenced to the Massachusetts State Plane Island Zone coordinate system, but have been projected in ArcInfo to the Mainland Zone for consistency with other MassGIS data layers. These mainland-zone images for the islands became available in June 2001; the images for all other areas were released in February, 1998.

The original one-meter images are 48 MB per tile. Two-meter versions of the images, resampled in ArcInfo, are 12 MB each. The tiles are in TIFF format and are accompanied by .tfw header files for georeferencing in GIS software. In addition, versions of the one-meter images in the MrSID format have been created at 30:1 compression with 8 zoom levels. These are available with .sdw header files as individual MrSID images as well as one single mosaic comprising the entire coastline, including Martha's Vineyard and Nantucket. The one-meter SIDs may be downloaded or ordered on DVD (from the Digital Data Products section of the order form). The MrSID mosaic may be purchased on DVD because of file size considerations.}
}
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