Owens, J.P., Sugarman, P.J., Sohl, N.F., and Orndorff, R.C., 1995a, Geologic Map of New Jersey: Southern Sheet, U.S. Geological Survey Open-File Report OFM 95-254, 1:100,000 scale.
Owens, J.P., Sugarman, P.J., Sohl, N.F., Parker, R.A., Houghton, H.F., Volkert, R.A., Drake, A.A. Jr., and Orndorff, R. C., 1995b, Geologic Map of New Jersey: Central Sheet, U.S. Geological Survey Open-File Report OFM 95-253, 1:100,000 scale.
Stanford, S.D., Witte, R.W., and Harper, D.P., 1990, Hydrogrologic Character and Thickness of the Glacial Sediment of New Jersey, N.J. Geological Survey Open-File Map OFM-3, 1:100,000 scale, 2 sheets.
Stanford, S.D., Witte, R.W., and Harper, D.P., Digital compilation by Scott, M.C. and Herman, G.C., 1996, Glacial Sediments of New Jersey: N.J. Geological Survey Digital Geodata Series DGS 96-1, 1:100,000 scale, <http://www.state.nj.us/dep/njgs/geodata/dgs96-1.htm>.
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Geologic-unit contacts for the glacial parts of the saqfr250 coverage were compiled by scanning mylar separates of the U.S. Geological Survey central bedrock sheet and the N.J. Geological Survey Open-File Map OFM-3 using a CalComp ScanPlus II scanner set at 400 dpi resolution. The scanner accuracy is +/-.25%. The images were saved using a TIFF 5.0 image format. The images were center-line traced into a vector format using CADCore Version 2.0 raster-to-vector conversion software. The vector lines were saved as ARC/INFO generate files with a line format. These line coverages were then generated and edited as ARC/INFO GIS polygon coverages in board inches. Proof plots were made of each coverage on mylar and compared to the original base maps. Any line that deviated from the original position by more than .012 in. (about 1 to 1.5 line widths) were re-digitized, re-plotted, and corrected until the desired results were obtained. CalComp 9100 and 9500 digitizers were used for editing. The coverages were then transformed into NAD27 SPC feet using corner points of 7-1/2 minute quadrangles for the transformation links. RMS registration errors from the transformation process were less than .006. Coverages were projected into NAD83 SPC feet after final map editing.
The glacial parts of the saqfr250 coverage stem from clipping polygons in the /geodata/geology/srficial/state/glacial/sediment coverage with the set of 50 ft. isopach lines from the /geodata/geology/srficial/state/glacial/thickness coverage. Geonum item values for each polygon were used for combining lithologic units into aquifer units using the ARC/INFO dissolve function. Any resulting polygons less than 1,000,000 square feet in area were then selected and deleted. Polygon labels for the saqfr250 coverage were then added and updated.
(GEONUM, HYDROABB, GEONAME, SYMBOL*, AQFRRANK)
110, t, Till, 73, D 116, m, Morainic Deposits, 41, D 120, l, Lake-bottom Sediment, 29, E 400, sg, Sand and Gravel, 53, B 999, sscp, Surficial sediment of the Coastal Plain > 50 ft thick, 3, C