New Jersey 2002 High Resolution Orthophotography
NJ Office of Information Technology (NJOIT), Office of Geographic Information Systems (OGIS)
Digital orthophotography of New Jersey, distributed as an Open Geospatial Consortium compliant Web Map Service (WMS). The map service includes an image data set of digital color infrared orthophotography of New Jersey from 2002. The native data set spatial reference system is State Plane Coordinate System NAD83 Coordinates, U.S. Survey Feet. In most client software, the default spatial reference system of the service will be Geographic Coordinates, WGS84.
Digital orthophotography combines the image characteristics of a photograph with the geometric qualities of a map. Digital orthophotography is a process which converts aerial photography from an original photo negative to a digital product that has been positionally corrected for camera lens distortion, vertical displacement and variations in aircraft altitude and orientation. The imagery was captured at a negative scale of 1″ = 1600′ in the spring of 2002, under leaf-off conditions, on color-infrared film. The ortho-rectification process has achieved a +/-4.0 ft. horizontal accuracy at a 95% confidence level, National Standard for Spatial Data Accuracy (NSSDA). The final product has a nominal scale of 1:2400. The georeferenced TIFF tiles delivered to the State of New Jersey were then converted to lossless JPEG2000 files, which are used in this service.
The images supplied by this map service do not have exactly the same spatial accuracy as the original imagery, due to resampling during WMS processing. Visual inspection by OGIS staff suggests that object locations may shift by as much as a foot. Users who require the best possible accuracy should obtain the original TIFF imagery. Assessment of the fitness for use of this service is entirely the responsibility of the user; see Distribution Liability for further information.
Data set creation of original TIFF imagery was performed by BAE Systems ADR and subcontractors. The New Jersey 2002 high resolution orthophotography project was planned, initiated, and primarily funded by the NJ Office of Information Technology. Additional state funding was obtained from the NJ Department of Transportation and NJ Transit. The U.S. Geological Survey (USGS) and the Natural Resources Conservation Service (NRCS) also contributed federal funding.
Horizontal Position Accuracy
The data supplied by the map service do not have the same spatial accuracy as the original imagery, due to resampling during web map service processing. Visual inspection by OGIS staff suggests that object locations may shift by as much as a foot. The following is the Horizontal Accuracy Report for the original imagery: Orthophotography has a +/- 4.0 ft. horizontal accuracy at 95% confidence level, National Standard for Spatial Data Accuracy (NSSDA), for a 1.0 foot Ground Resolution Distance (GRD). Horizontal accuracy determined as 1.7308 times the RMSE circular error. This requirement will not be applicable in areas where the ground is obscured on the aerial photography by foliage, prevalent smoke, or dense shadow.
Acknowledgement of the map service provider, NJ Office of Information Technology (NJOIT), Office of Geographic Information Systems (OGIS) would be appreciated. The date for this imagery in a citation should be 2002.
The State of New Jersey provides the data set “as is”. The State makes no guarantee or warranty concerning the accuracy of information contained in the data. Also, the State makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data files have been processed successfully on computers at the State, no warranty is made by the State regarding the use of the data on any other system, nor does the fact of distribution constitute or imply such a warranty.
Map software is provided ‘as-is’, without any express or implied warranty. In no event will boydsmaps.com be held liable for any damages arising from the use of this software. The user assumes all risks associated with the use of this software. boydsmaps.com will not be held responsible for any inaccuracies and no responsibility is assumed for damages or other liabilities due to errors, installation, accuracy, availability, use or misuse of the data presented.
Full Metadata Link
Downloadable Version for Offline Use