Identification_Information: Citation: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: 1994 Title: Major Bedrock Valleys of Illinois Edition: 20040331 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: ISGS GIS Database Issue_Identification: GISDB_BEDGEO.IL_Bedrock_Valleys Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: The map scale is 1:500,000 Online_Linkage: http://www.isgs.illinois.edu/ Online_Linkage: http://illinois.edu Description: Abstract: This feature dataset shows continuous lines representing the lowermost elevations/locations of (buried) bedrock valleys in the state of Illinois. Additionally, names of buried valleys are annotated. Scale is 1:500,000. Several major bedrock valleys are found across the state. The greatest control for the present bedrock surface configuration was probably the preglacial surface configuration. Interpretations of bedrock topography have been modified since the 1950's. Horberg contoured his map with the philosophy that the bedrock surface map represented the preglacial topography modified by glacial erosion, which formed U-shaped valleys. The current map, showing narrow valley channels and bedrock knobs in wide channels, indicates complex preglacial and glacial erosion primarily from running water. The major valleys were formed before the minor valleys that appear as tributaries. Streams that formed during successive glaciations probably eroded to bedrock and produced the small tributary valleys to the main channels. The bedrock surface was less likely to be eroded as sediments accumulated during each successive glaciation. Please refer to the metadata for the parent coverage, Buried Bedrock Surface of Illinois (GISDB_BEDGEO.IL_Bedrock_Topography_1994_Ln) for more information. Purpose: Applications are regional or statewide studies, preferably at a scale of 1:500,000. Bedrock valley data can be used in conjunction with the buried bedrock surface information, which will be useful in such fields as groundwater resource planning, engineering geology and earthquake hazard mapping. The data are not appropriate as a geodetic, legal or engineering base. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines. Supplemental_Information: A version of this is also housed on optical disk as bedval-2. Recent updates to the data: In March 2004 edition 1.0 of the data set was transitioned to storage in an Oracle RDBMS using the ArcSDE geodatabase model. The result (this version) is designated Edition 20040331. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Currentness_Reference: publication dates of digital sources Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -91.5826823 East_Bounding_Coordinate: -87.38401652 North_Bounding_Coordinate: 42.49563968 South_Bounding_Coordinate: 36.95351896 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geology Theme_Keyword: bedrock Theme_Keyword: valley Theme_Keyword: Illinois basin Place: Place_Keyword_Thesaurus: none Place_Keyword: Illinois Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: Tertiary Temporal_Keyword: Cretaceous Temporal_Keyword: Pennsylvanian Temporal_Keyword: Mississippian Temporal_Keyword: Devonian Temporal_Keyword: Silurian Temporal_Keyword: Ordovician Temporal_Keyword: Cambrian 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: The published geological map (ISGS Illinois Map 5, 1994) was the source for updated feature attributes. Attribute code assignments were reviewed by both the ISGS and the USGS and are believed to be fully representative of the source document. Logical_Consistency_Report: When in coverage format, this data set was checked for complete chain-node topology (no dangling arcs, except where appropriate), boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. Completeness_Report: This data set depicts the buried bedrock valleys of Illinois. Only major valleys are included. Although this version has updated the major valleys since Horberg (1950), that source also shows smaller-scale tributary valleys which are not included in this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal positional accuracy of this data with respect to the source map was verified by ISGS and USGS personnel by visual comparison (manual overlay) of source mylars and hard-copy plots. Arcs within one line-width of source mylars were deemed acceptable. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Herzog, B.L.. B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery Publication_Date: 1994 Title: Buried Bedrock Surface of Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS GIS Database Issue_Identification: GISDB_BEDGEO.IL_Bedrock_Topography_1994_Ln Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: Scale is 1:500,000. This is the digital version of ISGS Map Series, Illinois Map 5. Source_Scale_Denominator: 500000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: linework and attributes Source_Information: Source_Citation: Citation_Information: Originator: Herzog, B.L., B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery Publication_Date: 1994 Title: Buried Bedrock Surface of Illinois Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: ISGS Illinois Map Series Issue_Identification: 5 Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Source_Scale_Denominator: 500000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: contour attributes (elevation values) Source_Information: Source_Citation: Citation_Information: Originator: Herzog, B.L.. B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery Publication_Date: 1994 Title: Original mylar separates for map of Buried Bedrock Surface of Illinois Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Other_Citation_Details: unpublished material Source_Scale_Denominator: 500000 Type_of_Source_Media: stable-base material Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: contour lines Source_Information: Source_Citation: Citation_Information: Originator: Horberg, L. Publication_Date: 1950 Title: Bedrock Topography of Illinois Geospatial_Data_Presentation_Form: report Series_Information: Series_Name: ISGS Bulletin Issue_Identification: 73 Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Source_Scale_Denominator: not available Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1950 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: not available Process_Step: Process_Description: Initial information was digitized from ISGS Bulletin 73. Process_Date: Unknown Process_Step: Process_Description: Updates to information were made corresponding to the creation of ISGS Illinois Map Series Plate 5. Refer to Process Step Entries for GISDB_BEDGEO.IL_Bedrock_Topography_1994_Ln for detailed information about creation of the source data set. Process_Date: 1994 Process_Step: Process_Description: The source coverage data for the feature classes were reprojected from the customary ISGS Lambert projection, NAD27 to geographic coordinates, NAD83, double-precision. The line features were imported into the ISGS SDE enterprise database, following steps outlined in ISGS procedure GISDB_0009. The source coverage was bedval. The annotation feature class was imported into SDE from the source coverage using the method in an article entitled Converting Annotation from Coverage to Geodatabase Format (Colin Childs, ArcUser Magazine, October-December 2001, pp. 22-23) and the companion tutorial (referenced in the article.) Prior to using the steps in the tutorial, a TAT coverage file had to be generated for the coverage. This was done in ArcInfo Workstation 7.2.1 with the following commands. Arc: copyfeatures bedval anno bedval anno.anno Arc: build bedval annotation.anno Process_Date: 20040331 Process_Contact: Contact_Information: Contact_Person_Primary: Time_of_Day: 13395200 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 55 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 32 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees 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 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_BEDGEO.IL_Bedrock_Valleys_Ln Detailed_Description: Entity_Type: Entity_Type_Label: GISDB_BEDGEO.IL_Bedrock_Valleys_An Overview_Description: Entity_and_Attribute_Overview: File attribute items are in typical SDE feature class format. The following arc items require additional explanation: NAME - name of bedrock valley 1 - ancient Mississippi (Lower and Middle Illinois and Princeton) 2 - Mahomet (Teays) 3 - Kaskaskia 4 - Paw Paw and Rook 5 - Troy 6 - Pecatonica 7 - Onarga 8 - Little Wabash 9 - Embarras 10 - Skillet Fork 11 - Saline 12 - Big Muddy 13 - Macoupin 14 - Cache 200 - Carthage, Lower Spoon, Ticona, Danvers, Middletown, Pesotum, Danville 300 - Kempton and Chatsworth 400 - Kirkwood, Athens, Wyoming, plus four unnamed tributary channels (Pecatonica [2], Rook [1], Danville [1]) 999 - state boundary Annotation features are included to display the bedrock valley name. Entity_and_Attribute_Detail_Citation: none 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