Location Points from the ISGS Wells and Borings Database

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Frequently-anticipated questions:


What does this data set describe?

Title: Location Points from the ISGS Wells and Borings Database
Abstract:
This shapefile contains point locations from the ISGS Wells and Borings database. The attribute information include API number (the ID), well or boring type, longitude, and latitude. The spatial reference is geographic coordinates, decimal degrees, NAD83.

The data are exported to a shapefile weekly from the Wells and Borings (source) database for Internet distribution. The source database is updated daily. Thus, there may be recent updates (last 7 days) in the source database that are not reflected in this shapefile.

The data are primarily oil, gas and water wells, but also include other designations such as engineering boring, stratigraphic test hole, injection well, etc.

The collection contains data for over 548,000 wells and borings, some dating back to 1801 (assumed.) Most locations have not been field verified.

The nominal scale is 1:62,500, however locations have been determined in several different ways at different scales. Most commonly, the location is derived by converting a legal (i.e. Public Land Survey Survey - PLSS) description to a point location. The stated accuracy is +/- 100 feet, however some points may be inaccurate by as much as one mile due to irregularities in the Illinois PLSS and associated descriptions. For legal descriptions that indicate only a PLSS section or quarter-section, the point is assumed to be in the center of the respective section or quarter-section.

Additional detailed information about these wells and borings is available free of charge online at the Illinois State Geological Survey web site (<http://www.isgs.illinois.edu/>) in the ILOIL (oil and gas) and ILWATER (water and related wells) interactive map services.

Bulk and special order data retrievals are also available for a fee as described in the Standard Order Process of the Distribution Information section. Additional information may include owner, permit details, PLSS location, total depth, surface elevation, geologic formation and material description, driller's log, and down-hole logs.

  1. How should this data set be cited?

    Illinois State Geological Survey, 20080221, Location Points from the ISGS Wells and Borings Database: ISGS GIS Database GISDB.IL_WELLS_Borings_Location_Pt, Illinois State Geological Survey, Champaign, Illinois.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -91.472896
    East_Bounding_Coordinate: 0.000000
    North_Bounding_Coordinate: 42.885817
    South_Bounding_Coordinate: 0.000000

  3. What does it look like?

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

    Beginning_Date:
    Ending_Date: Most recent Thursday
    Currentness_Reference:
    Oldest assumed permit date to date of extraction from ISGS Wells and Borings database. The date of extraction is the most recent Thursday. The metadata document in the downloadable bundle contains the explicit date.

  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):

      • Entity point (548000+, increasing weekly)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:

  7. How does the data set describe geographic features?

    IL_WELLS_Borings_Location_Pt

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    API_NUMBER
    Unique ID in American Petroleum Institute (API) format

    STATUS
    Status/designation/type

    Formal codeset
    Codeset Name:status.dbf
    Codeset Source:ISGS Wells and Borings database

    LATITUDE
    Latitude in decimal degrees, NAD83

    LONGITUDE
    Longitude in decimal degrees, NAD83

    Entity_and_Attribute_Overview:
    Refer to the companion file status.dbf for description of status codes.


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?

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

    Contact_Instructions:
    Please refer to the contact information in the Distribution Information section.


Why was the data set created?

These data are intended to provide a simple GIS-based portrayal of the distribution and type of wells and borings in Illinois.

The data do not replace the need for detailed site-specific studies.

The information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. The information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.


How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Illinois State Geological Survey, ISGS Wells and Borings database.

    Other_Citation_Details: This database is updated daily.
    Type_of_Source_Media: disc
    Source_Scale_Denominator: 62500
    Source_Contribution: All location and attribute information.

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

    Date: weekly on Thursday (process 1 of 1)
    The data are exported to a shapefile weekly from the Wells and Borings (source) database for Internet distribution. The source database is updated daily. Thus, there may be recent updates (last 7 days) in the source database that are not reflected in the shapefile.

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

    , ISGS Terms of Use.

    Online Links:

    , University of Illinois Web Privacy Notice.

    Online Links:

    , University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4).

    Online Links:

    , Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign.

    Online Links:


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

  1. How well have the observations been checked?

    Attributes are as recorded in the ISGS Wells and Borings database as of the noted date of extraction. Attributes are collected from well permits and reports. The information contained in these permits and reports is not verified by the ISGS.

    Refer also to the Disclaimer of Warranties and Accuracy of Data section of the Legal Notices of Terms and Conditions section of the University of Illinois Web Privacy Policy. A link is provided in the Cross References section.

  2. How accurate are the geographic locations?

    The nominal scale is 1:62,500, however locations have been determined in several different ways at different scales. Most commonly, the location is derived by converting a legal (i.e. Public Land Survey Survey - PLSS) description to a point location. The stated accuracy is +/- 100 feet, however some points may be inaccurate by as much as one mile due to irregularities in the Illinois PLSS and associated descriptions. For legal descriptions that indicate only a PLSS section or quarter-section, the point is assumed to be in the center of the respective section or quarter-section.

    The collection contains data for over 548,000 wells and borings, some dating back to 1801 (assumed.) Most locations have not been field verified.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    All non-confidential point locations in the ISGS Wells and Borings database are included. It is likely there are existing wells and borings that are not included in the ISGS Wells and Borings database, for example, those not reported, those placed prior to a regulatory reporting requirement, and those not subject to a regulatory reporting requirement.

    The data are exported to a shapefile weekly from the Wells and Borings (source) database for Internet distribution. The source database is updated daily. Thus, there may be recent updates (last 7 days) in the source database that are not reflected in the shapefile.

  5. How consistent are the relationships among the observations, including topology?

    Some points occur at the origin of coordinate space. These are points for which a real location cannot be determined. For example, they may have an erroneous or non-existent legal description.


How can someone get a copy of the data set?

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

Access_Constraints:
ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current. Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section.
Use_Constraints:
ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved. University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section.

Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage.

Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section.

Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.

  1. Who distributes the data set? (Distributor 1 of 1)

    Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois
    Wells and Borings Database Administrator
    615 East Peabody Drive
    Champaign, Illinois 61820
    USA

    217-333-4747 (voice)
    isgs@isgs.illinois.edu

    Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time
  2. What's the catalog number I need to order this data set?

    The basic product in ESRI shapefile format includes the location, ID and type of well or boring and is available free of charge. Additional detailed information about these wells and borings is available free of charge online at the Illinois State Geological Survey web site (<http://www.isgs.illinois.edu/>) in the ILOIL (oil and gas) and ILWATER (water and related wells) interactive map services. Bulk and special order data retrievals are also available for a fee as described in the Standard Order Process. Additional information may include owner, permit details, PLSS location, total depth, surface elevation, geologic formation and material description, driller's log, and down-hole logs. Refer also to <http://www.isgs.illinois.edu/sections/gru/wellmaps.shtml>.

  3. What legal disclaimers am I supposed to read?

    Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following:

    Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law

    By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind.


Who wrote the metadata?

Dates:
Last modified: 02-Apr-2009
Metadata author:

Contact_Instructions:
Please refer to the contact information in the Distribution Information section.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Illinois Natural Resources Geospatial Data Clearinghouse

Generated by mp version 2.8.25 on Thu Apr 02 14:58:40 2009