New Jersey Geological Survey DGS98-5 Aquifers of New Jersey METADATA 1. IDENTIFICATION INFORMATION 1.1. CITATION Aquifers of New Jersey By G.C. Herman, R.J. Canace, S.D. Stanford, R.S. Pristas, P.J. Sugarman, M.A. French, J.L Hoffman, M.S. Serfes, and W.J. Mennel Digital Compilation by G.C. Herman N.J. Geological Survey Digital Geodata Series DGS98-5 1.2. DESCRIPTION 1.2.1 ABSTRACT The Aquifers of New Jersey consists of two ARC/INFO Geographic Information Systems (GIS) coverages of the bedrock and surficial aquifers and confining units in New Jersey. The bedrock-aquifer coverage includes fractured-rock aquifers of the Valley and Ridge, Highlands, and Piedmont physiographic provinces, and aquifers and confining units of the Coastal Plain physiographic province. The surfical-aquifer coverage includes glacial sediment exceeding 50 ft. thickness in northern New Jersey, and surficial sediment thicker than 50 ft. overlying Coastal Plain aquifers and confining units. Both coverages are generalized to the 1:250,000 scale by eliminating polygons with less than 1,000,000 sq. ft. area (about 23 acres). The data were digitized from various published and unpublished 1:24,000, 1:100,000, and 1:250,000 scale geologic maps compiled from 1987 to 1993. 1.2.2. LIST OF DIRECTORIES AND BRIEF DESCRIPTION baqfr250 - ARC/INFO polygon coverage of bedrock aquifers and confining units saqfr250 - ARC/INFO polygon coverage of surficial aquifers info - ARC/INFO INFO directory 1.2.3. LIST OF FILES AND BRIEF DESCRIPTION baqfr250.e00 (2.27MB) - ARC/INFO (v. 7.1.1) uncompressed export file (ASCII text) of the bqfr250 coverage saqfr250.e00 (1.27MB) - ARC/INFO (v. 7.1.1) uncompressed export file (ASCII text) of the saqfr250 coverage readme.txt (15KB) - ASCII text file containing a description of map units for the aquifers and confining units 1.2.4. LIST OF KEYWORDS aquifer, bedrock aquifer, surficial aquifer, fractured-bedrock aquifer, confining unit 1.3. GEOGRAPHIC EXTENT The State of New Jersey 1.4. CONTACTS INFORMATION Gregory Herman and Robert Canace N.J. Dept. Environmental Protection Division of Science & Research N.J. Geological Survey PO Box 427 Trenton, NJ 08625 phone: (609) 984-6587 email: gherman@dep.state.nj.us ******************************************************** 2. DATA QUALITY INFORMATION 2.1. NAME OF DATA baqfr250 and saqfr250 2.1.1 DESCRIPTION OF THE TYPE OF DATA ARC/INFO (v.7.0) GIS coverages containing vectors with arc-node topology and polygon and line attributes. 2.1.2 DATA SOURCE Unit contacts for the fractured-rock aquifers of the Valley and Ridge province were digitized from unpublished maps compiled by the N.J. Geological Survey at the 1:24,000 scale. All remaining unit contacts in the baqfr250 coverage were digitized from Open-File maps compiled by the U.S Geological Survey and the N.J. Geological Survey at the 1:100,000 scale (Drake and others, 1994; Owens and others, 1995a;1995b). Unit contacts for the glacial aquifers and confining units are from N.J. Geological Survey DGS 96-1 (Stanford and others, 1996). Unit contacts for the surfical sediments overlying Coastal Plain aquifers and confining units were compiled at the 1:250,000 scale by the authors. 2.1.3. DATA ORGANIZERS Don Monteverde and Greg Herman mapped and compiled aquifer data for the Valley and Ridge province. Scott Stanford compiled the extent of the surfical sediments thicker than 50 ft. overlying Coastal Plain aquifers and confining units. All other data were and compiled from the 1:100,000 scale maps listed in section 8 below. All data were digitized by Ron Pristas, Greg Herman, and Mary Ann Scott. 2.1.4. DATE OF COMPLETION May 21, 1998 Revised April 22, 1999, by GCH by adding one ommitted bac polygon at the north end of Newark Basin. 2.1.5. DATA AUTOMATION AND ACCURACY Polygon contacts for the northern and southern thirds of the baqfr250 coverage and contact lines for the surfical sediment thicker than 50 ft. overlying Coastal Plain units for the saqfr250 coverage were digitized using ARC/INFO Geographic Information Systems (GIS) software and CalComp 9100 and 9500 digitizers with reported accuracy's of +/- 0.005 in. (+/-0.127 mm). Coverage features were digitized directly into NAD27 state-plane-coordinate (SPC) feet using registration points (tics) corresponding to the corners of U.S. Geological Survey 7-1/2 minute quadrangles. Tic locations were taken from the N.J. Dept. of Environmental Protection coverage /data/mapgrids/spctiles. All maps were georegistered using a maximum root-mean-square (RMS) error of .006 (about 12 ft. at the 1:24,000 scale or 100 ft. at the 1:100,000 scale) using a set of at least four tics. Proof plots were made for each map and compared to the originals. Any line that deviated from the original position by more than .012" (about 1 to 1.5 line widths) were re-digitized until acceptable results were obtained. The coverages were projected into NAD83 SPC feet after final map editing. Geologic-unit contacts for the central third of the baqfr250 coverage and 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 bedrock coverages were appended into a single coverage and edited to remove non-essential boundary lines. Polygon labels for the baqfr250 coverage were then added and updated. Geonum item values for each polygon were used for combining lithologic units into aquifer units using the ARC/INFO dissolve function. Any polygons less than 1,000,000 square feet in area were selected and deleted. 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. ********************************************************* 3. SPATIAL DATA ORGANIZATION INFORMATION 3.1. NAME OF DATA baqfr250 and saqfr250 3.1.1 DATA STRUCTURE Vector data with arc-node topology. Spatial objects include polygons, arcs, labels, tics, and nodes with x,y coordinates. 3.2. NUMBER OF SPATIAL OBJECTS baqfr250 contains 992 arcs, 394 polygons, 803 nodes, 300 annotations, 212 tics, 60381 arc segments, and 393 polygon labels. saqfr250 contains 2609 arcs, 525 polygons, 2193 nodes, 212 tics, 23583 arc segments, and 490 polygon labels. ******************************************************** 4. SPATIAL REFERENCE INFORMATION 4.1 DATA PARAMETERS Scale = 1:250,000 Datum = NAD83 Coordinate System = N.J. State Plane Units = feet Projection = Polyconic Zone = 4701 4.1.2. MAPEXTENT baqfr250 saqfr250 xmin = 193624.000 xmin = 196324.000 ymin = 35034.773 ymin = 113174.242 xmax = 659480.375 xmax = 659480.375 ymax = 919466.250 ymax = 918745.438 ********************************************************* 5. ENTITY AND ATTRIBUTE INFORMATION 5.1. NAME OF DIGITAL DATA baqfr250 5.1.1 ITEMS AND ATTRIBUTES (polygons, arcs, and tics) 5.1.1.1 POLYGONS (BAQFR250.PAT) COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 BAQFR250# 4 5 B - 13 BAQFR250-ID 4 5 B - 17 GEONUM 5 6 I - 22 HYDROABB 8 9 C - 30 GEONAME 80 81 C - 110 SYMBOL 5 6 I - 115 AQFRRANK 3 4 C - note: AREA, PERIMETER, BAQFR250#, and BAQFR250-ID are default system variables. GEONUM, HYDROABB, GEONAME, SYMBOL, and AQFRRANK are user-specified variables that conform to attribute standards specified in the N.J. Geological Survey reference files /geodata/utility/geolabel.txt and /geodata/utility/geoitems.txt. The following list describes the values of the user-specified variables in the coverage: (GEONUM, AQFRABB, GEONAME, SYMBOL*, AQFRRANK) 992, hb, Holly Beach water-bearing zone, 9, C 1451, kca, Kirkwood-Cohansey aquifer system, 95, B-A 1525, ccu, Composite confining unit, 103, E-D 1526, ccua, Composite confining unit aquifer, 86, C-B 2355, mlwa, Mt. Laurel-Wenonah aquifer, 47, C 2475, mawcu, Marshalltown-Wenonah confining unit, 84, E 2505, eas, Englishtown aquifer system, 75, B 2525, mewcu, Merchantville-Woodbury confining unit, 33, E 2660, prma, Potomac-Raritan-Magothy aquifer system, 97, A 3200, bs, Basalt, 104, D 3800, db, Diabase, 110, E 3050, ba, Brunswick aquifer, 52, C 3060, bac, Brunswick aquifer conglomerate, 44, C 5100, lf, Lockatong Formation, 72, D 5305, lfc, Lockatong Formation conglomerate, 44, C 5400, sf, Stockton Formation, 56, C 5425, sfc, Stockton Formation conglomerate, 44, C 6125, gpkm, Rocks of the Green Pond Mt. Region, Kittatinny Mt., and Minisink Valley, 120, D 8199, mfjs, Martinsburg Formation and Jutland Sequence, 4, D 8399, jklh, Jacksonburg Limestone, Kittatinny Supergroup, and Hardyston Quarzite, 113,C-B 8999, imr, Igneous and metamorphic rocks, 79, D *The SYMBOL values are designed for use with the ARC/INFO shadeset file colornames.shd. --------------------------------------------------------- 5.2.1.1 ARCS (BAQFR250.AAT) COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 BAQFR250# 4 5 B - 25 BAQFR250-ID 4 5 B - 29 LINTYPE 1 1 I - note: FNODE#, TNODE#, LPOLY#, RPOLY#, LENGTH, BAQFR250#, and BAQFR250-ID are default system variables. LINTYPE is a user-specified variables that conforms to attribute standards specified in the N.J. Geological Survey reference file /geodata/utility/geoitems.txt. The following list describes the values of the LINTYPE variable: LINE TYPE VALUE Unit contact 0 State Boundary 9 --------------------------------------------------------- 5.1.1.3 TICS (BAQFR250.TIC) COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC 1 IDTIC 4 5 B - 5 XTIC 4 12 F 3 9 YTIC 4 12 F 3 note: all items are system default variables --------------------------------------------------------- --------------------------------------------------------- 5.2. NAME OF DIGITAL DATA saqfr250 5.2.1 ITEMS AND ATTRIBUTES (polygons and tics) 5.2.1.1 POLYGONS (SAQFR250.PAT) COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 SAQFR250# 4 5 B - 13 SAQFR250-ID 4 5 B - 17 GEONUM 5 6 I - 22 HYDROABB 8 9 C - 30 GEONAME 80 81 C - 110 SYMBOL 5 6 I - 115 AQFRRANK 3 4 C - note: AREA, PERIMETER, SAQFR250#, and SAQFR250-ID are default system variables. GEONUM, HYDROABB, GEONAME, SYMBOL, and AQFRRANK are user-specified variables that conform to attribute standards specified in the N.J. Geological Survey reference files /geodata/utility/geolabel.txt and /geodata/utility/geoitems.txt. The following list describes the values of the user-specified variables in the coverage: (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 *The symbol values are designed for use with a custom shadeset file (bedrock.shd) available from the N.J. Geological Survey. --------------------------------------------------------- 5.2.1.2 TICS (GAQFR250.TIC) COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC 1 IDTIC 4 5 B - 5 XTIC 4 12 F 3 9 YTIC 4 12 F 3 note: all items are system default variables 5.4 LIST OF RELATED TEXT FILES AND LOOK-UP TABLES /geodata/utility/geolabel.txt lists item variables used by the N.J. Geological Survey for labeling polygons denoting geologic and hydrologeologic units. /geodata/utility/geoitems.txt lists item variables used by the N.J. Geological Survey for arcs denoting geologic, geographic, and geophysical contacts, and miscellaneous polygon attributes within various geodata coverages. The readme.txt file accompanying this set of coverages contains the description of map units accompanying the published map representation of these coverages (N.J. Geological Survey Open-File Map OFM-24). ********************************************************* 6. DISTRIBUTION INFORMATION Data are available in a number of different formats and media upon request. ********************************************************* 7. METADATA REFERENCE INFORMATION 7.1 PUBLICATION DATE March 25, 1998 Revised April 22, 1999 to reflect addition of bac in north end of Newark Basin. 7.2 METADATA AUTHOR Gregory C. Herman ********************************************************* 8. PUBLISHED REFERENCES Drake, A.A., Jr., Volkert, R.A., Monteverde, D.H., Herman, G.C., Houghton, H.F., Parker, R.A., and Dalton, R.F., 1994, Bedrock Geologic Map of Northern New Jersey; Northern Bedrock Sheet: U.S. Geological Survey Miscellaneous Investigations Series Map I-2540-A , scale 1:100,000, 2 sheets. 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. ********************************************************* 9. AUTHORS NOTES Use of the coverages at more scales more detailed than 1:250,000 could result in registration errors. If more detailed information are needed please contact the N.J. Geological Survey.