wri014246wlmap_bndry

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Frequently anticipated questions:


What does this data set describe?

Title: wri014246wlmap_bndry
Abstract:
The Cape May study area boundary (wri014246wlmap_bndry, polygon), includes part of the Tuckahoe River Basin, and includes but is not limited to the entire basins of Tarkiln Brook, Mill Creek, Fishing Creek, Dias Creek, Bidwell Creek, Goshen Creek, Dennis Creek, Sluice Creek, East Creek, and West Creek and all of Cape May County, New Jersey, and parts of the New Jersey counties of Atlantic and Cumberland. The basin delineations (Ellis and Price, 1995) have been developed for general purpose use by USGS staff, originally from 1:24,000 scale (7.5 minute) USGS quadrangles. The horizontal datum is NAD 83. The study area boundary is one of four data layers used to present water level information for the Cape May study. The four geographic data layers were developed at a scale of 1:24,000, and consist of; (1) the study area boundary (wri014246wlmap_bndry, polygon), (2) water-levels from wells (wri014246wlmap_gwpts, points), (3) water-levels from streams (wri014246wlmap_stmpts, points), and (4) an interpretive water-table contour map (wri014246wlmap_wlcont, lines). The water-level information for the unconfined aquifer system in the Cape May study area presented here is drawn from two reports of much larger scope, that include an assessment of the hydrogeologic framework, groundwater flow, availability of water supplies and salt-water intrusion. The information from the rest of the original report are not available in geographic data layer form, but can be downloaded as PDF's of the complete original reports cited herein. The digital data sets that support unconfined-aquifer water-levels and interpretations for the Cape May 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 (Spitz, 1998, Lacombe and Carleton, 2002).
  1. How should this data set be cited?

    U.S. Department of the Interior, U.S. Geological Survey, Ellis, W. H., Price C.V., Spitz, F.J., Lacombe, P.J., and Carleton, G.B., Authors, 19981231, wri014246wlmap_bndry.

    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: -74.972124
    East_Bounding_Coordinate: -74.539221
    North_Bounding_Coordinate: 39.324472
    South_Bounding_Coordinate: 38.928239

  3. What does it look like?

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

    Beginning_Date: 01-Jan-1995
    Ending_Date: 31-Jan-1995
    Currentness_Reference:
    Areal span and time 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):

      • GT-polygon composed of chains (1)

    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 D 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?

    wri014246wlmap_bndry
    NJDEP 11 digit Hydrologic Unit Boundary (Source: NJDEP)

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    surf_basin
    boundary (Source: USGS)

    Sequential unique whole numbers that are automatically generated.

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

    Positive real numbers that are automatically generated.

    Shape_Area
    Area of feature in internal units (meters) squared. (Source: ESRI)

    Positive real numbers that are automatically generated.


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?

    Spitz, F.J., 1998, Analysis of groundwater flow and saltwater encroachment in the shallow aquifer system of Cape May County, New Jersey, U.S. Geological Survey Water-Supply Paper 2490, 51 p. (page 11, figure 11a) http://pubs.er.usgs.gov/publication/wsp2490
    Lacombe, P.J., and Carleton, G.B., 2002, Hydrogeologic framework, availability of water supplies, and saltwater intrusion, Cape May County, New Jersey, U.S. Geological Survey Water-Resources Investigations Report 01-4246, 152 p. (page 10 figure 5, page 63 figure 35, page 141 Appendix 1) http://pubs.usgs.gov/wri/wri014246
    Ellis, W. H., and Price C.V., 1995, Development of a 14-Digit Hydrologic Coding Scheme and Boundary Data Set for New Jersey, USGS Water-Resources Investigations Report 95-4134. 1 sheet, 1:250,000. http://pubs.er.usgs.gov/publication/wri954134 (digital geographic data at: http://www.state.nj.us/dep/gis/digidownload/metadata/statewide/dephuc14.htm)

  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 boundary for the Cape May study delineates the area of interest in which the depth to water, altitude of the water table, gradients, and direction of groundwater flow within the unconfined aquifer system were examined. Delineation of the study area was done in cooperation with the New Jersey Department of Environmental Protection for their purpose of developing a scientific basis to help address environmental, water-resource managment 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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