Driftless Areas in IllinoisEntry ID: IGDNR_DRIFTLESS
Abstract: This is a polygon feature class containing driftless areas in Illinois. These areas are analogous to areas of the state where the bedrock surface is not buried. Data are originally from the Buried Bedrock Surface map (1:500,000) by Herzog et al (1994) and the related feature class GISDB_BEDGEO.IL_Bedrock_Topography_1994_Ln.
There are no attribute data associated with the spatial data in this data set. The nominal scale is 1:500,000.
Purpose: Appropriate applications are regional or statewide studies, preferably at a scale of 1:500,000. These data can be used in conjunction with buried bedrock surface, loess, glacial boundary, and drift thickness information to demonstrate various aspects of the unglaciated portions of Illinois.
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.
Data Set Citation
Dataset Originator/Creator: Illinois State Geological Survey
Dataset Title: Driftless Areas in Illinois
Dataset Series Name: ISGS GIS Database
Dataset Release Date: 1994
Dataset Release Place: Champaign, Illinois
Dataset Publisher: Illinois State Geological Survey
Issue Identification: driftless
Data Presentation Form: mapOnline Resource: http://clearinghouse.isgs.illinois.edu/data/geology/driftless-areas
Paleo Temporal Coverage
LAND SURFACE > EROSION/SEDIMENTATION > STRATIGRAPHIC SEQUENCE
PALEOCLIMATE > LAND RECORDS > GLACIATION
PALEOCLIMATE > LAND RECORDS > LOESS
PALEOCLIMATE > LAND RECORDS > STRATIGRAPHIC SEQUENCE
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > BEDROCK LITHOLOGY
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > SEDIMENTARY ROCKS
SOLID EARTH > TECTONICS > PLATE TECTONICS > STRATIGRAPHIC SEQUENCE
Access Constraints none
Use Constraints Reproduction or redistribution of copyrighted digital data sets
or products derived therefrom outside of licensees'
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 the
appropriate custodial division within DNR.
Any hardcopies utilizing DNR 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 DNR data sets, nor to imply that changes they
made were approved by DNR.
These data are not to be used for commercial profit.
Data Set Progress
Distribution Media: Online
Distribution Size: 241KB
Distribution Format: Arc/Info export format
Fees: No fees
Role: DIF AUTHOR
Role: TECHNICAL CONTACT
Email: stiff at geoserv.isgs.uiuc.edu
Illinois State Geological Survey 615 East Peabody Drive U.S.A.
Province or State: Illinois
Postal Code: 61820
Extended Metadata Properties
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Creation and Review Dates
Last DIF Revision Date: 2018-05-11