DESCRIPTION OF THE TYPE OF DATA TIFF images (*.tif) are monochromatic bit maps. Geo-registration reference files (*.tfw) are ASCII text files.
DATA SOURCE: The images were compiled from the U.S. Geological Survey, 1:100,000 scale, digital raster graphics (DRG) image series. Following is the list of CD's, file names, and corresponding map sources for the imagery: CD LABEL NAME FILE NAMES 30 x 60 DEGREE MAP NAMES AND DATE 398573 SCRANTON-W F41075A1.TIF/TFW Scranton, PA-NJ (1986) 398574 SCRANTON-E F41074A1.TIF/TFW Middletown, NY-NJ (1986) 419745 NEWARK F40075A1.TIF/TFW Reading, PA-NJ (1984) F40075E1.TIF/TFW Allentown, PA-NJ (1984) 419752 WILMINGTON-W F39075A1.TIF/TFW Dover, DE-NJ-MD (1984) F39075E1.TIF/TFW Wilmington, DE-NJ-PA-MD (1984) 419746 NEWARK F40074A1.TIF/TFW Trenton, NJ-PA-NY (1982) F40074E1.TIF/TFW Newark, NJ-NY (1984) 451818 BRIDGEPORT F41073E1.TIF/TFW Bridgeport CT-NY-NJ (1986) 470809 NEW YORK-W F40073A1.TIF/TFW Long Branch, NJ (1982) F40073E1.TIF/TFW Long Island West, NY-NJ-CT (1986) 582200 WILMINGTON-E F39074A1.TIF/TFW Atlantic City, NJ (1984) F39074E1.TIF/TFW Hammonton, NJ (1984) 634224 SALISBURY-E F38074A1.TIF/TFW Cape May, NJ (1982) DATA ORGANIZERS : Gregory Herman processed and geo-registered the images, and wrote the metadata. DATE OF COMPLETION: November 30, 1998 Completeness_Report: SPATIAL DATA ORGANIZATION INFORMATION NAME OF DATA: north.tif and north.tfw central.tif and central.tfw south.tif and south.tfw The TIFF images are monochromatic bit maps. The geo-registration coordinate files (*.tfw) are ASCII text files.
ARC/INFO Grids and 3 TIFF image files with accompanying geo-registration reference files. SPATIAL REFERENCE INFORMATION: Scale = 1:100,000 Datum = NAD83 Coordinate System = NJ State Plane Units = feet Spheroid = CLARKE 1866 projected to GRS 1980 Projection = Polyconic Zone = 4701 Spatial_Domain: xmin ymin xmax ymax north 296863.938 607085.688 659489.228 919460.937 central 220345.469 333898.094 639262.471 607606.646 south 193624.000 35034.773 603290.994 3 35368.347
IMAGE PROPERTIES, COMMON IMAGE PROPERTIES: Image Format: TIFF Image Type: MONOCHROME Image Colormap: FALSE Image Compresion: FALSE Image Rotated: FALSE Image Depth: 1 Image Bands: 1
UNIQUE IMAGE PROPERTIES: Number of Number of Pixel Size (FT) Columns Rows DX DY north.tif 8703 7497 41.667 41.667 central.tif 10054 6569 41.667 41.667 south.tif 9832 7208 41.667 41.667
I. Description of Data to be Provided
The data provided herein are distributed subject to the following conditions and restrictions:
Subject Data Layers
For all data contained herein, (NJDEP) makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. NJDEP assumes no responsibility to maintain them in any manner or form.
II. Terms of Agreement
1. Digital data received from the NJDEP are to be used solely for internal purposes in the conduct of daily affairs.
2. The data are provided, as is, without warranty of any kind and the user is responsible for understanding the accuracy limitations of all digital data layers provided herein, as documented in the accompanying Data Dictionary and Readme files. Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact.
3. Digital data received from the NJDEP may not be reproduced or redistributed for use by anyone without first obtaining written permission from the NJDEP. This clause is not intended to restrict distribution of printed mapped information produced from the digital data.
4. Any maps, publications, reports, or other documents produced as a result of this project that utilize NJDEP digital data will credit the NJDEP's Geographic Information System (GIS) as the source of the data with the following credit/disclaimer:
"This (map/publication/report) was developed using New Jersey Department of Environmental Protection Geographic Information System digital data, but this secondary product has not been verified by NJDEP and is not state-authorized."
5. Users shall require any independent contractor, hired to undertake work that will utilize digital data obtained from the NJDEP, to agree not to use, reproduce, or redistribute NJDEP GIS data for any purpose other than the specified contractual work. All copies of NJDEP GIS data utilized by an independent contractor will be required to be returned to the original user at the close of such contractual work.
Users hereby agree to abide by the use and reproduction conditions specified above and agree to hold any independent contractor to the same terms. By using data provided herein, the user acknowledges that terms and conditions have been read and that the user is bound by these criteria.
USGS DRG -NJGS Monochromatic Color Palette Bit Map Conversion Color (Red,Green,Blue) -Color (R,G,B) Black (0,0,0) Black (0,0,0) White (255,255,255) White (255,255,255) Blue (0,151,164) Black (0,0,0) Red (203,0,23) Black (0,0,0) Brown (131,66,37) Black (0,0,0) Green (201,234,157) White (255,255,255) Purple (137,51,128) Black (0,0,0) Yellow (255,234,0) Black (0,0,0) Light Blue (167,226,226) White (255,255,255) Light Red (255,184,184) White (255,255,255) Light Purple (218,179,214) White (255,255,255) Light Grey (209,209,209) Black (0,0,0) Light Brown (207,164,142) Black (0,0,0) The source TIFF images were geo-registered into NAD83 State-Plane-Coordinate feet using the ARC/INFO Geographic Information System (GIS) <register> command. At least three links were used for registering each image. Registration links corresponding to 7-1/2 minute quadrangle tics were used where available, supplemented by other links located along the state boundary. Image registration results are listed below in section The images were rectified and saved as new images using the ARC/INFO GIS <rectify> command. Each image was imported into the ArcView (v.3.0a) GIS program for conversion to a ARC/INFO grid using the Spatial Analyst software. Each gridded image was automatically cropped to the New Jersey state limits using a vectorized boundary coverage (nj30x60m in section 5.2) resulting from clipping the set of 30 x 60 minute geographic tiles with the vectorized state boundary coverage . All grids were then merged into a statewide grid (njtopo100) using the ARC/INFO GIS GRID <merge> command. Gridded images for each of three sheets (north, central, and south) were then clipped to the vectorized boundary of each sheet using ArcView Spatial analyst with the gridclp.ave script. Each grid was converted to a new TIFF image using the ARC/INFO <gridimage> command. The following is an excerpt from a U.S. Geological Survey metadata file outlining the processing steps involved in the production of a standard DRG product. This information is supplied here in lieu of including all metadata files for all source images: PROCESS DESCRIPTION: The production procedures, instrumentation, hardware, and software used in the collection of standard DRG products vary depending on systems used at the contract, cooperator or USGS production sites. The majority of DRG data sets are acquired through government contract. The process step describes, in general, the process used in the production of standard DRG data sets. 1. Production of a DRG begins with the scanning of a paper 7.5-minute topographic map (map1) on a highresolution scanner. Scanning resolutions range from 500 - 1000 dpi with the output file running between 160-300 MB. 2. Removal of screens (descreening) and color quantization to reduce the number of colors also takes place during the scanning phase. 3. The raw scan file is then transformed and geo-referenced using UTM coordinates of the sixteen 2.5- minute grid ticks, which are obtained using the in-house produced program COORDAT and stored in a ground control file. Those sixteen 2.5-minute ticks are interactively visited and assigned their respective UTM coordinates. USGS program XSHAPES4 then performs a piecewise linear rubber sheet transformation. 4. An output resolution of 2.4 meters (8.2 feet) is chosen in order to resample the file to 250 dpi. 5. The image file is converted to a TIFF and further reduced by converting the file to a run length encoding Packbits compression(type 32773). 6. The color palette of the compressed DRG is then standardized by replacing the original RGB values assigned during the scanning process with standard RGB value combinations using the in-house produced TIFFREMAP program. 7. Prior to archiving the DRG undergoes the following quality assurance procedures: The color index values of each DRG are checked to ensure the RGB combinations are consistent with the standardized color palette. All DRG files are inspected to ensure that they are geometrically consistent with normal map presentation. Selected DRG's are checked to ensure that data elements in the DRG metadata file correspond to the map collar information and to the information in the associated image file. Selected DRG's are checked for geo-referencing accuracy by comparing the book value of latitude and longitude tick marks with corresponding tick intersections in the DRG image. Transformations are checked on selected DRG's by comparing the positions of well defined points, such as UTM grid intersections in the graphic product, with the corresponding image points in the DRG. USGS DRG production specifications are available on request from the National Mapping Division and Mid- Continent Mapping Center by contacting: Rolla-ESIC U.S. Geological Survey 1400 Independence Rd., MS231 Rolla, MO 65401-2602 Phone (573)308-3500 Facsimile (573)308-3615 E-mail to mcmcesic@usgs.gov World Wide Web: <http://mcmcweb.er.usgs.gov/drg/> All rectified images were checked for horizontal accuracy by comparing locations of 7-1/2 minute ticks on the imagery to those in the N.J. Department of Environmental Protection (NJDEP) GIS vector coverage of 7-1/2' tiles. The set of images meets the National Map Accuracy Standard (NMAS) for the 1:100,000 scale based on this analysis (not more than 10% of the points tested shall be in error more than 166.67 feet). IMAGE REGISTRATION RESULTS: The following statistics stem from registering the 14 30 x 60 minute sheets covering the New Jersey region into NAD83 State Plane Coordinate feet. These individual sheets have been merged and reformatted into a new set of images. A raster-graphic image portraying the extents of the 30 x 60 minute sheets covering New Jersey is available as listed in section 5.2. Allentown.tif Scale (X,Y) = (41.727,41.623) Rotation = 0.009 degrees RMS error (image,cover) = (0.184,7.683) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 5 319066.917,698772.032 319061.976,698762.708 10.552 6 318733.428,653212.997 318738.359,653222.301 10.530 7 353193.198,607482.057 353191.969,607479.738 2.624 8 354241.578,789583.284 354242.816,789585.621 2.645 Atlantic.tif Scale (X,Y) = (20.822,20.809) Rotation = 0.019 degrees RMS error (image,cover) = (2.717,56.548) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 1 351088.811,243284.568 351096.330,243230.411 54.677 2 350449.557,130607.494 350432.301,130696.098 90.268 3 410766.962, 60819.836 410729.936, 60793.258 45.577 4 56912.449,197285.091 456902.327,197298.549 16.840 3 50869.463,197648.040 350866.944,197651.571 4.337 7 492282.430,197268.130 492269.800,197295.756 30.377 8 421230.256,106376.633 421302.289,106324.148 89.126 Bridgeport.tif Scale (X,Y) = (41.690,41.656) Rotation = 0.146 degrees RMS error (image,cover) = (0.000,0.000) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 2 630132.218,804435.789 630132.218,804435.789 0.000 4 630246.837,789614.820 630246.837,789614.820 0.000 5 655266.935,789787.175 655266.935,789787.175 0.000 Capemay.tif Scale (X,Y) = (20.799,20.803) Rotation = 0.567 degrees RMS error (image,cover) = (1.613,33.544) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 1 349958.330, 61101.992 349991.979, 61102.551 33.654 2 634216.714, 61118.099 634183.068, 61117.540 33.651 3 635153.976,-120993.764 635187.405,-120993.209 33.434 4 349051.079,-120992.654 349017.647,-120993.209 33.437 Dover.tif Scale (X,Y) = (20.836,20.842) Rotation = 0.029 degrees RMS error (image,cover) = (3.780,78.778) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 2 351117.759,243260.530 351141.708,243226.770 41.392 3 350492.364,130687.764 350518.073,130617.788 74.549 4 199567.927,230165.378 199587.794,230065.532 101.803 5 315597.482,197825.859 315538.253,197901.443 96.026 7 280241.926,198115.995 280237.096,198147.320 31.696 8 244878.485,198401.773 244873.020,198498.446 96.827 Hammonton.tif Scale (X,Y) = (20.805,20.800) Rotation = 0.000 degrees RMS error (image,cover) = (3.183,66.223) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 2 615703.470,425163.545 615744.007,425230.062 77.896 4 351621.775,334361.353 351636.547,334275.571 87.044 5 421959.953,334020.944 421942.950,333977.626 46.535 6 527423.887,333992.729 527373.146,333899.554 106.095 7 492258.130,242758.545 492241.403,242764.810 17.862 8 386381.445,242966.983 386398.004,243051.216 85.845 9 457021.952,288427.330 457033.401,288408.766 21.811 10 352169.666,425281.842 352152.679,425331.118 52.122 11 351102.283,243195.458 351120.424,243230.006 39.021 Longbranch.tif Scale (X,Y) = (40.812,41.751) Rotation = 0.038 degrees RMS error (image,cover) = (1.382,57.047) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 7 639048.813,546698.107 639049.671,546707.782 9.713 8 633626.651,511664.851 633634.428,511743.677 79.209 9 634226.076,516546.081 634216.306,516453.049 93.544 10 633111.657,573842.002 633119.319,573867.063 26.206 11 632836.938,581958.148 632830.412,581937.619 21.541 Longisland.tif Scale (X,Y) = (41.691,41.658) Rotation = 0.036 degrees RMS error (image,cover) = (1.019,42.455) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 2 630690.972,708540.123 630705.968,708590.193 52.268 4 659439.376,788816.790 659479.205,788829.280 41.742 5 630251.509,789616.367 630243.844,789618.567 7.975 6 630698.168,708531.583 630713.218,708481.378 52.412 7 655280.866,789797.863 655276.060,789783.337 15.300 8 648639.567,746607.736 648582.163,746607.706 57.404 Middletown.tif Scale (X,Y) = (20.804,20.765) Rotation = 0.027 degrees RMS error (image,cover) = (2.715,56.434) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 2 630209.476,789594.075 630222.050,789618.129 27.142 4 354194.551,789601.315 354181.515,789650.431 50.817 5 492239.583,880283.524 492230.036,880300.152 19.174 6 423459.565,880365.070 423468.531,880421.611 57.248 7 388899.618,835059.239 388921.057,834969.313 92.446 8 526672.262,834834.023 526651.866,834777.609 59.988 2. Newark.tif Scale (X,Y) = (41.622,41.612) Rotation = 0.027 degrees RMS error (image,cover) = (1.752,72.926) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 1 630164.157,789635.640 630218.726,789620.486 56.634 4 354245.677,789596.332 354223.932,789618.092 30.763 5 492260.860,607035.512 492218.656,607107.230 83.214 6 353099.072,607424.530 353155.705,607470.045 72.655 7 353682.896,698607.274 353660.575,698549.746 61.707 8 457649.965,698157.950 457614.050,698168.452 37.419 9 492284.389,652683.382 492246.968,652606.094 85.871 10 353688.061,698602.856 353675.630,698526.094 77.762 11 388527.421,743775.317 388520.259,743886.525 111.439 12 353341.404,653006.634 353409.403,652972.664 6.012 Reading.tif Scale (X,Y) = (20.903,20.819) Rotation = 0.053 degrees RMS error (image,cover) = (1.841,38.408) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 1 353171.722,607453.247 353187.242,607426.176 31.204 4 335325.735,607584.977 335276.379,607605.733 53.542 5 352223.148,436015.253 352217.571,436063.277 48.347 6 336942.246,425451.665 336951.223,425422.324 30.683 7 352159.765,425362.477 352152.725,425346.267 17.673 8 333224.839,591505.406 333262.315,591509.248 37.673 Scranton.tif Scale (X,Y) = (41.799,41.588) Rotation = 0.035 degrees RMS error (image,cover) = (0.318,13.248) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 1 354212.299,789639.314 354215.690,789635.947 4.779 4 322415.268,789851.019 322421.030,789845.298 8.120 5 354359.398,816421.223 354366.374,816414.296 9.831 6 342916.398,801298.416 342900.270,801314.431 22.729 Trenton.tif Scale (X,Y) = (20.805,20.815) Rotation = 0.009 degrees RMS error (image,cover) = (3.759,78.221) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 1 352126.490,425245.344 352141.211,425308.606 64.953 2 353100.860,607435.666 353175.582,607459.016 78.285 3 632237.706,425269.984 632280.099,425329.692 73.228 4 562031.813,516183.319 562019.939,516095.305 88.811 6 527088.819,561537.237 527088.425,561542.690 5.467 7 422601.466,561581.227 422565.036,561613.732 48.823 8 387595.220,516312.128 387556.247,516238.541 83.270 9 457426.938,561479.272 457410.985,561572.815 94.894 10 527185.497,516144.856 527140.355,516026.067 127.077 11 422440.906,516204.660 422440.876,516139.177 65.483 12 596674.991,561690.727 596691.952,561758.775 70.130 2.7.14 Wilmington.tif Scale (X,Y) = (20.825,20.810) Rotation = 0.007 degrees RMS error (image,cover) = (1.041,21.663) Link Evaluation: [In Coverage Coordinates] Link Id Calculated (X,Y) True (X,Y) Distance 6 280984.843,289268.914 280980.207,289241.280 28.020 7 210529.827,289931.913 210550.873,289948.676 26.906 8 246242.898,335111.503 246217.867,335107.558 25.341 9 352132.266,425322.998 352140.671,425327.677 9.619 10 351135.623,243214.390 351135.839,243224.527 10.139 The accuracy check for the set of images is based solely on comparing locations of 7-1/2 minute ticks on the images to those from the NJDEP 7-1/2' tile coverage quads86 . The user should be aware that topographic elevations on the imagery are mapped in meters whereas image registration uses N.J. State Plane Coordinate feet.