The data were published in 1999 on an ISGS Illinois Geologic Quadrangle entitled Surficial Geology Map, Alton Quadrangle (Illinois Portion) Madison County, Illinois by David Grimley. These data do not include all the information on the published map. Refer to the published map for a complete explanation of the Quaternary geology of the Alton quadrangle.
The nominal scale is 1:24,000.
Illinois State Geological Survey, 1999, GeoTIFF Image of the Surficial Geology of the Alton Quadrangle (Illinois portion), Madison County, Illinois: ISGS Digital Database none, Illinois State Geological Survey, Champaign, Illinois.This is part of the following larger work.
Grimley, David A. , 1999, Surficial Geology Map, Alton Quadrangle (Illinois portion), Madison County, Illinois: Illinois Geologic Quadrangle (IGQ) Alton SG, Illinois State Geological Survey, Champaign, Illinois.
This is a Raster data set. It contains the following raster data types:
Planar coordinates are encoded using row and column
Abscissae (x-coordinates) are specified to the nearest 4.064817
Ordinates (y-coordinates) are specified to the nearest 4.064817
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.400000.
The flattening of the ellipsoid used is 1/294.978698.
Mapping contributions: E.D. McKay, J.A. Devera, B.F. Denny Clay mineralogy: H.D. Glass Data automation: J. Schoen, C. Abert, T. McTighe GIS processing: C. Abert, D. Nelson Graphic production: P.K. Carrillo Documentation: D. Nelson QA/QC: D. Nelson, C. Abert, R. Krumm
Illinois State Geological Survey
GIS Database Administrator
615 East Peabody Drive
Champaign, Illinois 61820
USA
217-333-4747 (voice)
isgs@isgs.uiuc.edu
- Hours_of_Service: 8:00 a.m. - 5:00 p.m. Central Time, Monday-Friday
- Contact_Instructions:
- When contacting us, please have this metadata file readily available so we can identify the data set of interest and the individual most appropriate to assist you.
This image is intended to provide a regional overview of the extent of Quaternary geologic materials in the Alton quadrangle. The image is not appropriate as a geodetic or engineering base, nor does it replace the need for detailed site-specific studies.
No attribute accuracy report.
No horizontal positional accuracy report.
No vertical positional accuracy report.
No completeness report. Mapping techniques are described on the published map.
The TIFF image was automatically produced by CorelDraw 9 software. The georeferencing data was added uisng ESRI ArcCatalog 8.1.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee 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.
These data should not be used at scales greater than 1:24,000.
Illinois State Geological Survey
GIS Database Administrator
615 East Peabody Drive
Champaign, Illinois 61820
USA
217-333-4747 (voice)
isgs@isgs.uiuc.edu
- Hours_of_Service: 8:00 a.m. - 5:00 p.m., Central Time, Monday-Friday
- Contact_Instructions:
- When contacting us, please have this metadata file readily available so we can identify the data set of interest and the individual most appropriate to assist you.
The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.In no event shall the DNR 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 DNR.
Illinois State Geological Survey
GIS Database Administrator
615 East Peabody Drive
Champaign, Illinois 61820
USA
217-333-4747 (voice)
isgs@isgs.uiuc.edu
- Hours_of_Service: 8:00 a.m. - 5:00 p.m. Central Time, Monday-Friday
- Contact_Instructions:
- When contacting us, please have this metadata file readily available so we can identify the data set of interest and the individual most appropriate to assist you.