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 542,000 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.uiuc.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.
The data are appropriate for use in local and regional analysis. The data are not appropriate as a geodetic, legal or engineering base. The data set is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. The data set has no legal basis in the definition of boundaries or property lines.
Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee's organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of ISGS.
Any hardcopies utilizing ISGS data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent ISGS data sets, nor to imply that changes they made were approved by ISGS.
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.
The collection contains data for over 542,000 wells and borings, some dating back to 1801 (assumed.) Most locations have not been field verified.
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.uiuc.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.uiuc.edu/sections/gru/wellmaps.shtml>.
In no event shall the ISGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by ISGS.
Illinois Natural Resources Geospatial Data Clearinghouse
Generated by mp version 2.8.11 on Tue Mar 25 12:02:08 2008