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

coq_coastal_1m_sid (400 files)
coq_coastal_1m_sid.dbf 81.99kB
1cnomans.zip 2.27MB
1c333846.zip 1.10MB
1c333842.zip 1.93MB
1c333838.zip 1.76MB
1c333834.zip 1.91MB
1c333830.zip 1.84MB
1c333826.zip 1.87MB
1c333822.zip 1.87MB
1c333818.zip 1.92MB
1c333778.zip 1.05MB
1c329858.zip 1.63MB
1c329854.zip 1.99MB
1c329850.zip 2.33MB
1c329846.zip 2.52MB
1c329842.zip 2.41MB
1c329838.zip 2.48MB
1c329834.zip 2.32MB
1c329830.zip 2.45MB
1c329826.zip 2.48MB
1c329822.zip 2.37MB
1c329818.zip 2.59MB
1c329814.zip 2.52MB
1c329810.zip 2.63MB
1c329786.zip 1.14MB
1c329782.zip 1.39MB
1c329778.zip 1.48MB
1c329774.zip 552.69kB
1c325866.zip 2.43MB
1c325862.zip 2.45MB
1c325858.zip 2.42MB
1c325854.zip 2.53MB
1c325850.zip 2.55MB
1c325846.zip 2.48MB
1c325842.zip 2.34MB
1c325838.zip 2.35MB
1c325834.zip 2.42MB
1c325830.zip 2.57MB
1c325826.zip 2.50MB
1c325822.zip 2.20MB
1c325818.zip 2.22MB
1c325814.zip 2.55MB
1c325810.zip 2.10MB
1c325794.zip 1.17MB
1c325790.zip 1.41MB
1c325786.zip 1.40MB
1c325782.zip 1.38MB
1c325778.zip 1.33MB
1c321866.zip 2.60MB
Too many files! Click here to view them all.
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
Click to see the full size image.
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.}
}

Send Feedback