The ArcSDE raster mosaics, through the use of data base storage and pyramiding, provide to client mapping software the exact area and resolution of data needed, on the fly.
The 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. The ortho-rectification process has achieved a +/-4.0 ft. horizontal accuracy at a 95% confidence level, National Standard for Spatial Data Accuracy (NSSDA). Individual original TIFF files were loaded to six ArcSDE raster mosaics by staff at the USGS EROS Data Center, then exported as Oracle .dmp files and loaded to the NJOIT - OGIS server.
The following is the Logical Consistency Report for the imagery itself: All files are inspected by the Production Manager to ensure that they conform to the specified file naming conventions, all files load in their correct geographic position when loaded using the ASCII file header, all files conform to the project specifications for pixel resolution, file standard, dimensions, and compression, and all files do not contain blemishes such as visible seam lines, tone differences, data dropout or artifacts; scan swathing, or warped bridges and overpasses.