wri924128wlmap_wlcont

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Frequently anticipated questions:


What does this data set describe?

Title: wri924128wlmap_wlcont
Abstract:
The water-table contour map (wri924128wlmap_wlcont, lines) is an interpretation based on water-level measurements that were made specifically for the Upper Maurice River study. Measurement sites consisted of strategically selected well and stream and surface water (lakes, ponds) locations. The shape of the water table is controlled principally by topography; therefore the water table contour interpretation tends to be a subdued reflection of the topography. This data layer is the same as that of the ground water-level contour interpretation presented in Lacombe and Rosman (1995), figure 2-1. The study area includes part or all of the basins of Maurice River, Great Egg Harbor River, Oldmans Creek, Mantua Creek, Raccoon Creek, Big Timber Creek, Little Ease Run, and Scotland Run, and parts of the New Jersey Counties of Cumberland, Gloucester, and Salem. The horizontal datum of the water-table contour map layer is NAD 83, and the vertical datum is NGVD 29. The water-table contour map is one of four data layers used to present the water-level information for the Upper Maurice River study area. The four geographic data layers were developed at a scale of 1:24,000, and consist of; (1) the study area boundary (wri924128wlmap_bndry, polygon), (2) water-levels from wells (wri924128wlmap_gwpts, points), (3) water-levels from streams (wri924128wlmap_stmpts, points), and (4) an interpretive water-table contour map (wri924128wlmap_wlcont, lines). The water-level information represents one part (sheet 2 of 5) of a comprehensive assessment of the hydrology of the unconfined aquifer system in the Upper Maurice River study area. The other four sheets of this report are not available in geographic data layer form, but they can be downloaded in PDF format from the complete original report cited herein. The other four sheets comprise information on (1) the hydrogeology and description of the study area, (2) stream discharge and climate data, (3) water quality, and (4) a detailed water-use and water-budget analysis. The digital data sets that support unconfined-aquifer water-levels and interpretations for the Upper Maurice River study area are derived from one of nine hard copy published reports which contain similar data and information across other areas of southern New Jersey. Digital data sets for the unconfined-aquifer water-level and interpretive portions from all nine reports are being simultaneously released, motivated by development of an interactive web-viewer tool that enables convenient online viewing of the information (http://nj.usgs.gov/special/web_mapper/). Eight of the nine published reports are from a comprehensive unconfined-aquifer study series; Great Egg Harbor River (Watt and Johnson, 1992), Toms River (Watt and others, 1994), Upper Maurice River (Lacombe and Rosman, 1995), Mullica River (Johnson and Watt, 1996), Salem River (Johnson and Charles, 1997), Maurice River (Charles and others, 2001), Rancocas Creek (Watt and others, 2002), and Atlantic Coastal (Gordon, 2004). The ninth report that contains unconfined-aquifer water-level data and an interpretation is from a comprehensive water-resource study in Cape May County (Lacombe and Carleton, 2002).
  1. How should this data set be cited?

    U.S. Department of the Interior, U.S. Geological Survey, Lacombe, P.J., and Rosman, R., Authors, 20041231, wri924128wlmap_wlcont.

    Other_Citation_Details:
    PROJECTED COORDINATE SYSTEM UTM NAD 83; original projection was UTM NAD 27.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -75.321691
    East_Bounding_Coordinate: -74.881918
    North_Bounding_Coordinate: 39.800191
    South_Bounding_Coordinate: 39.494986

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 01-Sep-1986
    Ending_Date: 30-Nov-1986
    Currentness_Reference:
    Areal span, time span, and vertical span represented by the measured water levels.

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • String (54)

    2. What coordinate system is used to represent geographic features?

      The map projection used is NAD 1983 UTM Zone 18N.

      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -75.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.0001
      Ordinates (y-coordinates) are specified to the nearest 0.0001
      Planar coordinates are specified in meter

      The horizontal datum used is North American 1983.
      The ellipsoid used is GRS 1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.

  7. How does the data set describe geographic features?

    wri924128wlmap_wlcont
    Water table contour map interpreted from groundwater and surface water points. (Source: USGS)

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE_Length
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    Water_Table_Contour
    Lines of equal water-table altitude, in ten-foot intervals, in feet above NGVD 29. Accuracy reflects groundwater and stream data point accuracy. (Source: USGS)

    Range of values
    Minimum:20
    Maximum:140
    Units:feet


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Lacombe, P.J., and Rosman, R.,1995, Hydrology of the unconfined aquifer system in the Upper Maurice River Basin and adjacent areas in Gloucester County, New Jersey, 1986-87, U.S. Geological Survey Water-Resources Investigations Report 92-4128, 5 sheets. (figure 2-1) http://pubs.er.usgs.gov/publication/wri924128

  3. To whom should users address questions about the data?

    U.S. Department of the Interior, U.S. Geological Survey
    3450 Princeton Pike, Suite 110
    Lawrenceville, New Jersey 08648
    US

    (609) 771-3900 (voice)
    (609) 771-3915 (FAX)
    dc_nj@usgs.gov

    Hours_of_Service: 8:00AM-4:30PM, Monday-Friday
    Contact_Instructions:
    Go to the website: http://nj.usgs.gov/ Or email: dc_nj@usgs.gov Or phone: (609) 771-3900


Why was the data set created?

The water-table contour map for the Upper Maurice River study area consists of interpreted lines of equal water-table altitude, based on water levels measured in wells and streams. The water-table contour map can be used to provide an interpretive assessment of depth to water, water-table altitude, water-table gradients, and the direction of groundwater flow within the unconfined aquifer system. The study was performed in cooperation with the New Jersey Department of Environmental Protection for their purpose of developing a scientific basis to help address environmental, water-resource management and planning, water availability, water use, and water quality questions.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the constraints of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.


Who wrote the metadata?

Dates:
Last modified: 10-Jun-2014
Metadata author:
U.S. Department of the Interior, U.S. Geological Survey
Attn: Emmanuel Charles, Jessica Centinaro, Leila Johnson
3450 Princeton Pike, Suite 110
Lawrenceville, New Jersey 08648
US

(609) 771-3900 (voice)
(609) 771-3915 (FAX)
dc_nj@usgs.gov

Hours_of_Service: 8:00AM-4:30PM, Monday-Friday
Contact_Instructions:
Go to the website: http://nj.usgs.gov/ Or email: dc_nj@usgs.gov Or phone: (609) 771-3900
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


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