Identification_Information: Citation: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: Unpublished Material Title: Generalized Statewide Location of Major Bedrock, Sand and Gravel, and Potential Shallow Aquifers in Illinois Edition: 20040401 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: ISGS GIS Database Issue_Identification: GISDB_HYDRO.IL_Major_Aquifers Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Online_Linkage: http://www.isgs.illinois.edu/ Online_Linkage: http://illinois.edu Description: Abstract: This feature dataset contains feature classes that show the general areal extent of major bedrock aquifers to various depths, major sand and gravel aquifers, and potential water-bearing unconsolidated strata to a depth of 50 feet. With the exception of GISDB_HYDRO.IL_Shallow_Coarse_Materials_Py, the attribute information is limited to a simple binary code indicating the area is or is not an aquifer. The shallow coarse materials feature class was derived from the statewide stack-unit map and contains stack-unit designations. The data are in the Geographic Coordinate System, decimal degrees, NAD83. Most of the feature classes have a scale of 1:500,000. GISDB_HYDRO.IL_Shallow_Coarse_Materials_Py has a scale of 1:250,000. Please refer to the metadata for the individual feature classes. Purpose: The datasets are intended to identify areas of Illinois where major bedrock and sand and gravel aquifers exist, and where other shallow water-bearing materials may exist. These data are appropriate for use in regional thematic analysis. The data are not appropriate as a geodetic, legal or engineering base. The datasets were not and are not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS, the data have no legal basis in the definition of boundaries or property lines. Supplemental_Information: In April 2004 the source coverages were transitioned to storage in an Oracle RDBMS using the ArcSDE geodatabase model. The result (this version) is designated edition 20040401. Prior to this time the feature classes were stored as separate coverages in the ISGS GISDB archive. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1985 Ending_Date: 1986 Currentness_Reference: Dates of source materials Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -91.4244 East_Bounding_Coordinate: -87.3840 North_Bounding_Coordinate: 42.4951 South_Bounding_Coordinate: 36.9540 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: aquifer Theme_Keyword: groundwater Theme_Keyword: water Theme_Keyword: hydrology Theme_Keyword: hydrogeology Place: Place_Keyword_Thesaurus: none Place_Keyword: Illinois 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. The data do not replace the need for detailed site-specific studies. Point_of_Contact: Contact_Information: Contact_Instructions: Please refer to the Distribution Information section. Native_Data_Set_Environment: ArcSDE 9.1 on Oracle 10g Cross_Reference: Citation_Information: Title: ISGS Terms of Use Online_Linkage: http://www.isgs.illinois.edu Cross_Reference: Citation_Information: Title: University of Illinois Web Privacy Notice Online_Linkage: http://www.vpaa.uillinois.edu/policies/web_privacy.cfm Cross_Reference: Citation_Information: Title: University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4) Online_Linkage: http://www.uillinois.edu/trustees/rules.cfm#sec34 Cross_Reference: Citation_Information: Title: Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign Online_Linkage: http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Please refer to the metadata for the individual feature classes. Logical_Consistency_Report: Please refer to the metadata for the individual feature classes. Completeness_Report: Please refer to the metadata for the individual feature classes. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Please refer to the metadata for the individual feature classes. Lineage: Process_Step: Process_Contact: Contact_Information: Contact_Person_Primary: Process_Description: The source coverages (...hydro/aq*) were imported into an ArcSDE enterprise geodatabase feature dataset for storage. Previously they were stored as individual coverages. The data were reprojected from the customary ISGS Lambert Conformal Conic projection (NAD27) to a geographic coordinate system (longitude, latitude) in decimal degrees (NAD83). The various coverage feature classes were imported using ArcCatalog 8.3. Some unnecessary data fields were dropped. Refer to the feature class-specific metadata for details. Prior to import, the spatial reference of the data set was changed to Geographic, decimal degrees, NAD83 in double precision. Also at this time, this metadata file was created. Process_Date: 20040401 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 3848 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 84 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 71 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 7 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 113 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 208 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Geographic: Geographic_Coordinate_Units: Decimal degrees Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Please refer to the metadata of the respective feature classes for specifics on attributes and their values. Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Shallow_Coarse_Materials_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Maj_Bedrock_Aq_Lt_300_Ft_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Maj_Bedrock_Aq_Lt_500_Ft_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Maj_Bedrock_Aq_Gt_500_Ft_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Maj_Sand_And_Gravel_Aq_Py Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_HYDRO.IL_Maj_Bedrock_Aq_Lt_300_Ft_Ln Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois Contact_Address: Address_Type: mailing and physical address Address: 615 East Peabody Drive City: Champaign State_or_Province: Illinois Postal_Code: 61820 Country: USA Contact_Voice_Telephone: 217-333-4747 Contact_TDD/TTY_Telephone: 217-785-0211 Contact_Electronic_Mail_Address: isgs@isgs.illinois.edu Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Distribution_Liability: 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. Technical_Prerequisites: 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. Metadata_Reference_Information: Metadata_Date: 20090224 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Instructions: Please refer to the Distribution Information section. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section. Metadata_Use_Constraints: The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section. Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile