This geographic information system (GIS) data set shows the extent of outcropping bedrock materials in northern and central New Jersey exclusive of the Coastal Plain. Two units are used: one showing where surficial materials are generally absent and bedrock outcrop is extensive and one showing where surficial materials are generally less than ten feet thick and bedrock outcrop is scattered.
This GIS data set depicts the extent of outcropping bedrock in northern and central New Jersey exclusive of the Coastal Plain. It was prepared in cooperation with the U. S. Geological Survey (USGS) National Geologic Mapping Program.
Digital compilation of geologic data sets by Ronald S. Pristas. Authors Notes: Enlargement of the data to more detailed scales than specified could result in registration errors. If information is needed at more detailed scales, please contact the New Jersey Geological Survey to determine the status of detailed mapping.
For data supplied by the Department the following Distribution Agreement (NJDEP) shall accompany all data transfers. The users agree to abide by the terms and conditions of the following: 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.
P.O. Box 427, 29 Arctic Parkway
Technical inquiries regarding geology should be directed to Scott Stanford, Research Scientist 1, New Jersey Geological Survey. Technical inquiries regarding the GIS data layer should be directed to Ronald S. Pristas, GIS Specialist 1, New Jersey Geological Survey.
United States Geological Survey (U.S.G.S.), National Geologic Mapping Program
Attribute accuracy is tested by manually comparing hard copy plots of the digital data with the source materials. When attributes can not be visually verified on plots they are interactively queried and verified on the screen.
The software ArcGIS 9.x checks for topology consistency and ensures that there are no duplicate lines, overshoots or undershoots.
Exhaustive checks completed on all data layers. Internal review by author and compiler, Survey management, and Survey Editorial staff.
Four registration tics on the 1:100,000 scale base map were utilized to register and transform the data from board-inches to state plane coordinate feet. A root-mean-square (RMS) error of 0.005 was required (approximately 41.67 feet at 1:100,000 scale). Proof plots were made for each data set on stable-base media and compared to the original data. Line work that deviated from the original position by more than 0.02 inch were re-digitized, re-plotted and corrected until acceptable results were obtained
With in National Map Accuracy Standards.
Unpublished manuscript line work compiled by the author.
Stable-base manuscripts were manually digitized by U.S.G.S.. Adobe Illustrator layers of the section lines and registration marks were exported as ESRI shapefiles (in board-inches) using Avenza's MaPublisher software. The registration marks correspond to known coordinates on the base maps (NAD83, New Jersey state plane coordinate feet). The shapefiles were converted to Arc/Info coverages. An empty coverage was generated by manually inputting the known coordinates as the registration marks (tics). Each tic was also assign a unique identification number. The coverage with the section lines and registration marks was then edited. The tics automatically created for this coverage were moved so they exactly overlayed the registration marks. The tics were assigned the same unique identification numbers as in the empty coverage. The section lines and registration marks coverage was then transformed into the empty coverage. The section lines and registration marks are now in NAD83, New Jersey state plane coordinate feet. The transformation had an RMS error of 0.005. The coverage was then checked against the original maps. The coverages were then edge-matched, joined together, and converted to ESRI's shapefile format.
P. O. Box 427, 29 Arctic Parkway
Internal feature number.
Geologic formation name abbreviation.
New Jersey Geological Survey
Geologic formation name.
New Jersey Geological Survey
Area of feature in internal units squared.
Length of feature
401 East State Street, Box 428
see "Use Constraints"
Shapefile version of layer available through Network Resource Name (Link).
Box 427, 29 Arctic Parkway