Elevation Contours of the top of the Jamestown Coal

Illinois State Geological Survey 2001 Elevation Contours of the top of the Jamestown Coal 1.0 (Prior to 1995 no version numbers had been assigned to this coverage. vector digital data ISGS GIS Database jtown_el Champaign, Illinois Illinois State Geological Survey GISDB_COAL_IL_Jamestown_Elevation_Ln withheld This datafile shows the general elevation of the top of the Jamestown Coal in Illinois. These 100-foot isolines were contoured by Earthvision software using data points from the ISGS Coal Section stratigraphic database. The data was not contoured using fault lines for control and no manual adjustments were made to the contours to reflect the presence of known faults. This data set is intended for use at a scale of 1:750,000. This data set was created as part of the ISGS GIS database to show general elevation of the Jamestown Coal seam. The data are appropriate for regional analysis. These data are appropriate for use in local and regional thematic analysis. 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. none en 2001 publication date of sources Complete Irregular -88.009571 -87.495214 39.422328 38.568089 -88.005530 -87.531381 38.568565 39.408003 none geology coal coal seams mineral resources structure Jamestown none Illinois none Pennsylvanian none 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 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. Christopher P. Korose Illinois State Geological Survey - Coal Section mailing address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-7256 217-333-2830 Contact this individual ONLY for specific information about the use of this data set. For general questions about distribution, or availability of other data, please contact the Information Office as listed under the Distribution_Information section. ESRI ArcCatalog 8.3.0.800 Shapefile The attributes of the original ArcInfo coverage were reviewed in 2001 by visual inspection of the contours for elevation anomolies and comparison with earlier published structure maps. Original point- source data associated with anomolies were checked for accuracy of location, correlation, and reporting of surface and bed elevation. These reviews were performed in an iterative fashion by two or three individuals. There are no arc or polygon attribute values outside the appropriate value domains. Accuracy of point-source information is variable, depending on the source materials and the geologist. Some logs are precise measurements of thickness and depth, others may have errors or be rounded. Geologic correlations are, of course, open to other interpretations. In general: measurements from core descriptions and coal test geophysical logs are accurate to within fractions of an inch; measurements from drillers logs may be accurate to within an inch to 5 feet, depending on the equipment used and the experience of the on-site geologist; measurements from oil test geophysical logs are accurate to within +/- one foot. Formal evaluation tests have not been run, but daily hands-on experience using the data for real-life applications has proven the quality of the database. Experience suggests that less than 1% of the data contain errors that involve gross mis-location of points or mis-correlation of coals. This map did not make use of all available point-source data nor were traces of previously mapped faults and other structural features used to control or modify contours. This map was created to depict broad regional trends in elevation of the coal. More detailed, larger scale maps should be consulted for site-specific information on coal elevation. Polygon topology is present. The point-source data was compiled by ISGS staff for various projects (primarily related to coal resources, structure, and mining geology) dating back to 1938. This subset was compiled for and is available from the USGS's National Coal Resources Data System. No attempt has been made to compile all available data. This file does not represent all the well records on file at the ISGS, nor should the absence of data for one or more coals for a specific data point be interpreted to mean that those coals are not present. This is a generalized depiction of regional ground condition. Horizontal positional accuracy of the original point-source data is generally unknown. There is considerable variability depending on the source material. Some holes have surveyed locations and are accurate to within a foot, others have only description to the nearest forty acres. Overall, the database administrator estimates that most points are within 500 feet of their correct locations, but no scientific tests have been done to verify this. ISGS Coal Section 2000 Coal Stratigraphic Data map ISGS Map same as title Champaign, Illinois Illinois State Geological Survey paper 2000 publication date none All attribute information Illinois State Geological Survey, Coal Section 2001 Extent of the Jamestown Coal in Illinois map ISGS GIS Database jtown_xtnt Champaign, Illinois Illinois State Geological Survey 500000 digital data set 2001 publication date none coal extent outline Extraction of point-source data Data points that contained an x/y coordinate and an elevation of the Jamestown Coal were extracted from the coal stratigraphic data base and formatted for Earthvision. 2000 Contouring of Elevation Elevation of point-source data was contoured using Dynamic Graphic Inc.'s Earthvision software. Grid size was set to 2000 feet. Defaults were used for all other parameters. 2000 Post-contouring Processing 1. The Earthvision grid was exported to an Arc line coverage and clipped using the outcrop of the Jamestown Coal. 2. The Jamestown outcrop arcs were copied into the coverage. 3. Items for the .PAT and the .AAT files were added to the coverage. The .PAT items were: elev-top-of-bed 8 8 N 2 The .AAT items were: elev-top-of-bed 8 8 N 2 4. The line coverage was converted to a polygon coverage by automatically assigning the average value of bounding lines to each polygon (e.g. if a polygon was bounded by a 400 ft and 500 ft isoline, the polygon was assigned the value of 450 ft). Peak and valley polygons were assigned a value of plus or minus 50 ft of the bounding polygon (e.g. if a peak polygon was surrounded by a 500 ft isoline, the polygon was assigned a value of 550 ft). 5. Polygons less than 350 million square feet in area (about 12 square miles) were deemed to be artifacts of processing unsupported by the grid size used to contour the point-source data. These polygons were eliminated using the Arc eliminate command. 2000 Metadata imported. withheld Metadata imported. withheld 20040413 23540900 Vector Simple FALSE 0 TRUE FALSE North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 not applicable Explicit elevation coordinate included with horizontal coordinates ELEV_FEET ELEV_FEET Double 8 38 8 SHAPE Feature geometry. ESRI Coordinates defining the features. FID OID 4 10 0 Shape Source Organization String 255 Feature geometry. ESRI Coordinates defining the features. 0 0 GISDB_COAL.IL_Jamestown_Elevation_Py Feature Class 0 source_organization Dataset Name String 255 0 0 dataset_name Link String 255 0 0 hyperlink Date Last Updated String 255 0 0 dateupdated Source ID String 255 0 0 source_ID Shape Geometry 8 0 0 Feature geometry. Esri Coordinates defining the features. st_length(shape) st_length(shape) Double 0 0 0 Attribute items are in typical ARC/INFO feature class format. User-defined attributes are: Polygon attributes: ELEV_JTOWN_TOP - Average elevation of the top of the Jamestown Coal within the polygon. The contour interval is 100 feet and polygon boundary lines represent these contours (e.g. 100, 200, 300, etc.) Actual polygon values (e.g. 150, 250, etc.) reflect the average coal elevation within the polygon, as based on the bounding contours. none Illinois State Geological Survey Information Office mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 U.S.A. 217-244-2414 217-244-0802 isgs@isgs.uiuc.edu 8:00 a.m. - 5:00 p.m., Monday-Friday Downloadable Data 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. 0.000 0.000 20040329 20020828 Christopher P. Korose Illinois State Geological Survey mailing address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-7256 217-333-2830 korose@isgs.uiuc.edu FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time This metadata document is intended for public distribution none http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en {3938AF4F-C49B-435A-8CC7-B8C3873A70AC} 20040413 23540900 FALSE 20230629 00095600 20230629 00095600 REE0720_IL_Jamestown_Elevation_Ln 002 Projected GCS_WGS_1984 Linear Unit: Meter (1.000000) <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.1.0'><WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem> WGS_1984_Web_Mercator_Auxiliary_Sphere Esri ArcGIS 13.1.0.41833 REE0720_IL_Jamestown_Elevation_Ln -88.00553 -87.531381 39.408003 38.568565 1 -88.00553 -87.531381 39.408003 38.568565 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network 0.000 Shapefile Enterprise Geodatabase Feature Class GCS_North_American_1983 EPSG 6.18.3(9.3.1.2) 0 20230629