New Jersey 2006 National Agricultural Imagery Program (NAIP) Orthophotography
NJ Office of Information Technology (NJOIT), Office of Geographic Information Systems (OGIS)
Map Data Source
This Web Map Service (WMS) serves natural color imagery from the 2006 National Agriculture Imagery Program (NAIP) for New Jersey. NAIP acquires digital ortho imagery during the agricultural growing seasons in the continental U.S. A primary goal of the NAIP program is to enable availability of of ortho imagery within one year of acquisition. NAIP quarter quads are formatted to the UTM coordinate system using NAD83. NAIP imagery may contain as much as 10% cloud cover per tile. Compressed county-wide mosaics were derived from the quarter quads. Compressed county-wide mosaics for NJ were acquired by the NJ Office of Information Technology and reprocessed to NAD83 NJ State Plane feet in lossless JPEG2000 format. In most client software, the default spatial reference system of the Web Map Service will be Geographic Coordinates, WGS84.
For imagery capture dates, consult metadata records published by the USDA for the individual county mosaics. Most of the images were captured 2006-08. County mosaics were published 2006-12-11 (Atlantic, Bergen, Burlington, Camden, Cape May, Cumberland, Salem) and 2006-12-18 (Essex, Gloucester, Hudson, Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean, Passaic, Somerset, Sussex, Union, Warren.)
Horizontal Position Accuracy
The source imagery used is 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 5 meters of reference digital ortho quarter quads (DOQQ’s) from the National Digital Ortho Program (NDOP). Because the WMS provides a resampled image, the accuracy of this image may be slightly poorer. This effect has not been examined in a quantitative manner.
Acknowledgement of “NJ Office of Information Technology (NJOIT), Office of Geographic Information Systems (OGIS)” as the data source would be appreciated. Reference date for the data set in a citation should be 2006.
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