Cumulative (net) thickness of mapped coals in Illinois

Illinois State Geological Survey 2002 Cumulative (net) thickness of mapped coals in Illinois vector digital data ISGS GIS Database il_net_tk Champaign, Illinois Illinois State Geological Survey GISDB_COAL_IL_Net_Thickness_Py withheld Remaining cumulative (net) thickness of mapped coals, greater than 18 inches thick, in Illinois. Existing polygons of detailed coal thickness isopachs for 26 seams were compiled and added together, and are summarized as areas of coal thickness classified in increments of 5 feet. Areas of individual coal seam thicknesses less than 18 inches were excluded from the summation. Mined areas were also excluded from the summation. Areas containing confidential data have been omitted from this dataset. This map was created as part of a preliminary coalbed methane resource assessment conducted by the ISGS. 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. en 2002 publication date of sources Complete Irregular -91.216208 -87.495214 41.519075 37.591410 -91.216208 -87.495214 37.591410 41.519075 none geology coal thickness coal thickness net thickness cumulative thickness none Illinois 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 and physical address

615 East Peabody Drive

Champaign Illinois 61820 U.S.A. 217-333-7256 217-333-2830 korose@isgs.uiuc.edu 8:00 a.m. - 5:00 p.m., Monday-Friday 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 Coal thickness isopachs were updated by county and seam per coal resource assessments and/or coal availabilty studies specific to the coal seam. Isopachs for the individual coal seams are based on data available to the ISGS at the time of the original map compilation, and were originally contoured at intervals ranging from 2 to 12 inches, typically at 6-inch intervals. Accuracy of this compilation is dependent on the locational and measurement accuracy of the original data points, the distribution of data points, the local variability of the coal seam, the differing extents of coals mapped in Illinois and/or the differing extents and detail of thickness mapping for these coal seams, the summation of thickness data from multiple vertically-stacked seam-specific polygon sources, and other factors. This dataset is an attempt at using the detailed thickness polygons to estimate cumulative coal thickness in Illinois and is not meant to represent an isopach map from individual data points that could contain cumulative coal thickness information. This dataset is intended for use at a scale of 1:500,000. Polygon and chain-node topology is present. The coverage was checked for complete chain-node topology (no dangling arcs, except where appropriate), polygon labels (one per polygon, except for universal polygon), correct regions topology, boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. There are no known arc, polygon or region attribute values outside the appropriate value domains. In areas of limited data, boundaries have been generalized using section lines and/or county boundaries. This is a generalized depiction of regional ground condition. Horizontal positional accuracy was verified by manual overlay of source and hard-copy plots. Arcs within line-width of source maps are deemed acceptable. For positional accuracy of source maps, contact the ISGS Coal Section. Illinois State Geological Survey, Coal Section 1997 Illinois Coal Reserves Assessment and Database Development: Final Report report Open File Series 1997-4 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 1996 publication date none initial county resource coverages containing coal thickness isopachs and mined areas Illinois State Geological Survey, Coal Section 2002 Availability of the Colchester Coal for Mining in Northern and Western Illinois report Illinois Minerals 127 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 2001 publication date none updates to county thickness isopachs and mined areas Illinois State Geological Survey 2002 Availability of the Danville, Jamestown, Dekoven, Davis, and Seelyville Coals for Mining in Selected Areas of Illinois report Illinois Minerals 124 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 2002 publication date none updates to county thickness isopachs and mined areas Illinois State Geological Survey 2000 Availability of the Herrin Coal for Mining in Illinois report Illinois Minerals 120 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 2000 publication date none updates to county thickness isopachs and mined areas Illinois State Geological Survey 1999 Availability of the Springfield Coal for Mining in Illinois report Illinois Minerals 118 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 1999 publication date none updates to county thickness isopachs and mined areas Coals included in this study: >CODE NAME >1670 TROWBRIDGE >1760 SHELBYVILLE >1780 OPDYKE >1790 LOUDON >1800 BELLE RIVE >1870 FRIENDSVILLE >1910 BRISTOL HILL >2490 DANVILLE >2610 JAMESTOWN >2660 HERRIN >2790 SPRINGFIELD >2840 HOUCHIN CREEK >2940 SURVANT >3020 COLCHESTER >3170 SEELYVILLE >3210 DEKOVEN >3240 WILEY >3250 DAVIS >3272 SEAHORNE COAL >3320 WISE RIDGE >3330 MT. RORAH >3370 MURPHYSBORO >3490 ROCK ISLAND >3500 LITCHFIELD >3510 ASSUMPTION >3590 WILLIS Process work and notes by CC: The procedure was to adapt cpk's amls from various availability projects and calc tonnage for the Keystone writeup to get amls that do what we need. A couple of false starts involved going to the library to dissolve the various res covers to thickness covers over here in the cbm space. Besides hitting the snag that the res2660 covers wouldn't dissolve or mapjoin, we realized that after dissolving, we could no longer easily get back the areas that should have thickness = 0 (outside the crop, in channels, in areas of insufficient data, and mined-out areas). Thus, we needed to copy the res covers to the cbm space (copy_res.aml), then update them for this purpose. calc-thick-0.aml reselects for ctype = 3, 5, 6, or 9 and then calcs thick = 0; runcalc0.aml runs calc-thick-0.aml for each specific res cover. > CTYPE96 >1 Minable coal >2 Split coal >3 Channel >4 Less than 150' deep (Not used for CTYPE96. This was used for earlier CTYPEs) >5 Insufficient data >6 Mined-out area >7 Outside crop >8 Non-study area >9 Unminable area between mines >10 Coal too thin then rundis_all.aml invokes dis.aml for each specific res cover that had been copied over; dis.aml dissolves on the item THICK so that only the polygons referring to thickness are left. rundis_all does this for each res cover, so that coverages named tk[fips #]_ [seam] were created. then join_all.aml was run to mapjoin all thickness coverages created in the last step for each seam. -note, seam 2660 was omitted; due to problems with the input res covers, these need to be treated separately (it makes the process hang; they may not join at all; how 2660 Herrin seam was treated will be described separately) Then the item THICK needs to be altered in info so that when the different seams are unioned, it will be clear which seam has what thickness. Otherwise, the item THICK will be overwritten with each successive union, and there would be no way to calculate a cumulative thickness. alter.aml alters the item THICK (a 3,3,I item) to seam-specific thick items ** NOTE: this did not work, I did them by hand. first i had an aml that did it by itself, but it would not run due to error in the &data arc info line. so then i copied the format of runcalc0.aml and made an aml that should have worked by invoking an altr.aml for each one, and it did go in & out of info, but it did not make the alterations and i don't know why. check w/ cpk. it was taking longer to make the aml than to do it by hand, so i just did it, but i'd like to know why it did not work. >union all of them >Usage: UNION <in_cover> <union_cover> <out_cover> {fuzzy_tolerance} {JOIN | NOJOIN} >union tk_1670 tk_1760 tmpa 4 join >union tmpa tk_1780 tmpb 4 join >union tmpb tk_1790 tmpc 4 join >union tmpc tk_1800 tmpd 4 join >union tmpd tk_1870 tmpe 4 join >union tmpe tk_1910 tmpf 4 join >union tmpf tk_2490 tmpg 4 join >union tmpg tk_2610 tmph 4 join >union tmph tk_2790 tmpi 4 join >union tmpi tk_2840 tmpj 4 join >union tmpj tk_2940 tmpk 4 join >union tmpk tk_3020 tmpl 4 join >union tmpl tk_3170 tmpm 4 join >union tmpm tk_3210 tmpn 4 join >union tmpn tk_3240 tmpo 4 join > >dropitem TMPO.PAT TMPO.PAT TMPN# >dropitem TMPO.PAT TMPO.PAT TMPN-ID >dropitem TMPO.PAT TMPO.PAT TMPM# >dropitem TMPO.PAT TMPO.PAT TMPM-ID >dropitem TMPO.PAT TMPO.PAT TMPL# >dropitem TMPO.PAT TMPO.PAT TMPL-ID >dropitem TMPO.PAT TMPO.PAT TMPK# >dropitem TMPO.PAT TMPO.PAT TMPK-ID >dropitem TMPO.PAT TMPO.PAT TMPJ# >dropitem TMPO.PAT TMPO.PAT TMPJ-ID >dropitem TMPO.PAT TMPO.PAT TMPI# >dropitem TMPO.PAT TMPO.PAT TMPI-ID >dropitem TMPO.PAT TMPO.PAT TMPH# >dropitem TMPO.PAT TMPO.PAT TMPH-ID >dropitem TMPO.PAT TMPO.PAT TMPG# >dropitem TMPO.PAT TMPO.PAT TMPG-ID >dropitem TMPO.PAT TMPO.PAT TMPF# >dropitem TMPO.PAT TMPO.PAT TMPF-ID >dropitem TMPO.PAT TMPO.PAT TMPE# >dropitem TMPO.PAT TMPO.PAT TMPE-ID >dropitem TMPO.PAT TMPO.PAT TMPD# >dropitem TMPO.PAT TMPO.PAT TMPD-ID >dropitem TMPO.PAT TMPO.PAT TMPC# >dropitem TMPO.PAT TMPO.PAT TMPC-ID >dropitem TMPO.PAT TMPO.PAT TMPB# >dropitem TMPO.PAT TMPO.PAT TMPB-ID >dropitem TMPO.PAT TMPO.PAT TMPA# >dropitem TMPO.PAT TMPO.PAT TMPA-ID >dropitem TMPO.PAT TMPO.PAT TK_1670# >dropitem TMPO.PAT TMPO.PAT TK_1670-ID >dropitem TMPO.PAT TMPO.PAT TK_1760# >dropitem TMPO.PAT TMPO.PAT TK_1760-ID >dropitem TMPO.PAT TMPO.PAT TK_1780# >dropitem TMPO.PAT TMPO.PAT TK_1780-ID >dropitem TMPO.PAT TMPO.PAT TK_1790# >dropitem TMPO.PAT TMPO.PAT TK_1790-ID >dropitem TMPO.PAT TMPO.PAT TK_1800# >dropitem TMPO.PAT TMPO.PAT TK_1800-ID >dropitem TMPO.PAT TMPO.PAT TK_1870# >dropitem TMPO.PAT TMPO.PAT TK_1870-ID >dropitem TMPO.PAT TMPO.PAT TK_1910# >dropitem TMPO.PAT TMPO.PAT TK_1910-ID >dropitem TMPO.PAT TMPO.PAT TK_2490# >dropitem TMPO.PAT TMPO.PAT TK_2490-ID >dropitem TMPO.PAT TMPO.PAT TK_2610# >dropitem TMPO.PAT TMPO.PAT TK_2610-ID >dropitem TMPO.PAT TMPO.PAT TK_2790# >dropitem TMPO.PAT TMPO.PAT TK_2790-ID >dropitem TMPO.PAT TMPO.PAT TK_2840# >dropitem TMPO.PAT TMPO.PAT TK_2840-ID >dropitem TMPO.PAT TMPO.PAT TK_2940# >dropitem TMPO.PAT TMPO.PAT TK_2940-ID >dropitem TMPO.PAT TMPO.PAT TK_3020# >dropitem TMPO.PAT TMPO.PAT TK_3020-ID >dropitem TMPO.PAT TMPO.PAT TK_3170# >dropitem TMPO.PAT TMPO.PAT TK_3170-ID >dropitem TMPO.PAT TMPO.PAT TK_3210# >dropitem TMPO.PAT TMPO.PAT TK_3210-ID >dropitem TMPO.PAT TMPO.PAT TK_3240# >dropitem TMPO.PAT TMPO.PAT TK_3240-ID > >union tmpo tk_3250 tmpp 4 join >union tmpp tk_3272 tmpq 4 join >union tmpq tk_3320 tmpr 4 join >union tmpr tk_3330 tmps 4 join >union tmps tk_3370 tmpt 4 join >union tmpt tk_3490 tmpu 4 join >union tmpu tk_3500 tmpv 4 join >union tmpv tk_3510 tmpw 4 join >union tmpw tk_3590 tmpy 4 join > > >dropitem TMPY.PAT TMPY.PAT TMPW# >dropitem TMPY.PAT TMPY.PAT TMPW-ID >dropitem TMPY.PAT TMPY.PAT TMPV# >dropitem TMPY.PAT TMPY.PAT TMPV-ID >dropitem TMPY.PAT TMPY.PAT TMPU# >dropitem TMPY.PAT TMPY.PAT TMPU-ID >dropitem TMPY.PAT TMPY.PAT TMPT# >dropitem TMPY.PAT TMPY.PAT TMPT-ID >dropitem TMPY.PAT TMPY.PAT TMPS# >dropitem TMPY.PAT TMPY.PAT TMPS-ID >dropitem TMPY.PAT TMPY.PAT TMPR# >dropitem TMPY.PAT TMPY.PAT TMPR-ID >dropitem TMPY.PAT TMPY.PAT TMPQ# >dropitem TMPY.PAT TMPY.PAT TMPQ-ID >dropitem TMPY.PAT TMPY.PAT TMPP# >dropitem TMPY.PAT TMPY.PAT TMPP-ID >dropitem TMPY.PAT TMPY.PAT TMPO# >dropitem TMPY.PAT TMPY.PAT TMPO-ID >dropitem TMPY.PAT TMPY.PAT TK_3210-ID >dropitem TMPY.PAT TMPY.PAT TK_3250# >dropitem TMPY.PAT TMPY.PAT TK_3250-ID >dropitem TMPY.PAT TMPY.PAT TK_3272# >dropitem TMPY.PAT TMPY.PAT TK_3272-ID >dropitem TMPY.PAT TMPY.PAT TK_3320# >dropitem TMPY.PAT TMPY.PAT TK_3320-ID >dropitem TMPY.PAT TMPY.PAT TK_3330# >dropitem TMPY.PAT TMPY.PAT TK_3330-ID >dropitem TMPY.PAT TMPY.PAT TK_3370# >dropitem TMPY.PAT TMPY.PAT TK_3370-ID >dropitem TMPY.PAT TMPY.PAT TK_3490# >dropitem TMPY.PAT TMPY.PAT TK_3490-ID >dropitem TMPY.PAT TMPY.PAT TK_3500# >dropitem TMPY.PAT TMPY.PAT TK_3500-ID >dropitem TMPY.PAT TMPY.PAT TK_3510# >dropitem TMPY.PAT TMPY.PAT TK_3510-ID >dropitem TMPY.PAT TMPY.PAT TK_3590# >dropitem TMPY.PAT TMPY.PAT TK_3590-ID >dropitem TMPY.PAT TMPY.PAT TK_3500# > >****** start here, messing w/ #6; PROBLEMS FROM MAPJOINS OF RES COVERS > RECORDED IN join_2660.aml 9it stopped being an aml when it didn't > run and i recorded what worked and what didn't in that file) > >/coal14/avail/herrin/all-layers/transfer-to-usgs/thick6 > note that herrn_tk in /cbm/thick has codes like 2, 3, 5 for ss channel, > insuff. data, thin coal. these would be treated like inches, so this > thick6 cover is the better one to start with. > need to union with a statewide mines cover > note that I can't reselect the ctype = 6 (Mined-out area) and ctype = > 9 (Unminable area between mines) from the res covers because i'd > get the same problem of not being able to put them together as i > did with the whole and dissolved versions of the res covers. I will > have to assume that the unminable area between mines is negligible. > As it turns out, I should be able to get ctype = 9 by using the > type = A in the mine coverage. > then calc the mined areas to thick = 0 > (first check that item thick is 3, 3, i), YES! > >Arc: copy /coal14/avail/herrin/all-layers/transfer-to-usgs/thick6 thick6 >copy /coal11/coalgisdb/herrn_mines mines6 >union thick6 mines6 tkm6 4 join >info >SEL TKM6.PAT >RES TYPE CN 'A' OR TYPE CN 'B' OR TYPE CN 'K' OR TYPE CN 'L' OR TYPE CN 'M' OR TYPE CN 'N' >CALC THICK = 0 >q stop >dissolve tkm6 tk_2660 THICK poly > >union tmpy tk_2660 thickall 4 join > altered item thick to TK2660 > > >dropitem THICKALL.PAT THICKALL.PAT TK_2660# >dropitem THICKALL.PAT THICKALL.PAT TK_2660-ID >dropitem THICKALL.PAT THICKALL.PAT TMPY# >dropitem THICKALL.PAT THICKALL.PAT TMPY-ID > > NOTE: 57,203 records > >additem >Usage: ADDITEM <in_info_file> <out_info_file> <item_name> <item_width> > <output_width> <item_type> {decimal_places} {start_item} > >additem THICKALL.PAT THICKALL.PAT TKA 4 4 I >additem THICKALL.PAT THICKALL.PAT TKB 4 4 I >additem THICKALL.PAT THICKALL.PAT THICKALL 4 4 I > >INFO >ARC >SEL THICKALL.PAT >CALC TKA = TK1670 + TK1760 + TK1780 + TK1790 + TK1800 + TK1870 + TK1910 + TK2490 + TK2610 + TK2790 + TK2840 + TK2940 + TK3020 > >CALC TKB = TK3170 + TK3210 + TK3240 + TK3250 + TK3272 + TK3320 + TK3330 + TK3370 + TK3490 + TK3500 + TK3510 + TK3590 + TK2660 > >CALC THICKALL = TKA + TKB > >coverage thickall is the original gross thickness map. > >next, copy this and make a real gross thickness map; there are some >negative thicknesses (range is up to -57) and this may be altering the >cumulative thickness. > >copy thickall thickallg >SEL THICKALLG.PAT >RES TK1670 < 0 >CALC TK1670 = 0 >ASEL >RES TK1760 < 0 >CALC TK1760 = 0 >ASEL >RES TK1780 < 0 >CALC TK1780 = 0 >ASEL >RES TK1790 < 0 >CALC TK1790 = 0 >ASEL >RES TK1800 < 0 >CALC TK1800 = 0 >ASEL >RES TK1870 < 0 >CALC TK1870 = 0 >ASEL >RES TK1910 < 0 >CALC TK1910 = 0 >ASEL >RES TK2490 < 0 >CALC TK2490 = 0 >ASEL >RES TK2610 < 0 THIS HAD 306 >CALC TK2610 = 0 >ASEL >RES TK2790 < 0 >CALC TK2790 = 0 >ASEL >RES TK2840 < 0 >CALC TK2840 = 0 >ASEL >RES TK2940 < 0 >CALC TK2940 = 0 >ASEL >RES TK3020 < 0 >CALC TK3020 = 0 >ASEL >RES TK3170 < 0 >CALC TK3170 = 0 >ASEL >RES TK3210 < 0 >CALC TK3210 = 0 >ASEL >RES TK3240 < 0 >CALC TK3240 = 0 >ASEL >RES TK3250 < 0 >CALC TK3250 = 0 >ASEL >RES TK3272 < 0 >CALC TK3272 = 0 >ASEL >RES TK3320 < 0 >CALC TK3320 = 0 >ASEL >RES TK3330 < 0 >CALC TK3330 = 0 >ASEL >RES TK3370 < 0 >CALC TK3370 = 0 >ASEL >RES TK3490 < 0 >CALC TK3490 = 0 >ASEL >RES TK3500 < 0 >CALC TK3500 = 0 >ASEL >RES TK3510 < 0 >CALC TK3510 = 0 >ASEL >RES TK3590 < 0 >CALC TK3590 = 0 >ASEL >RES TK2660 < 0 >CALC TK2660 = 0 >ASEL >CALC TKA = TK1670 + TK1760 + TK1780 + TK1790 + TK1800 + TK1870 + TK1910 + TK2490 + TK2610 + TK2790 + TK2840 + TK2940 + TK3020 > >CALC TKB = TK3170 + TK3210 + TK3240 + TK3250 + TK3272 + TK3320 + TK3330 + TK3370 + TK3490 + TK3500 + TK3510 + TK3590 + TK2660 > >CALC THICKALL = TKA + TKB > > >then copy thickall and make a net thickness map, which will drop out all >thicknesses less than or equal to 18" before adding them > >copy thickall thickalln >SEL THICKALLN.PAT >RES TK1670 < 18 >CALC TK1670 = 0 >ASEL >RES TK1760 < 18 >CALC TK1760 = 0 >ASEL >RES TK1780 < 18 >CALC TK1780 = 0 >ASEL >RES TK1790 < 18 >CALC TK1790 = 0 >ASEL >RES TK1800 < 18 >CALC TK1800 = 0 >ASEL >RES TK1870 < 18 >CALC TK1870 = 0 >ASEL >RES TK1910 < 18 >CALC TK1910 = 0 >ASEL >RES TK2490 < 18 >CALC TK2490 = 0 >ASEL >RES TK2610 < 18 >CALC TK2610 = 0 >ASEL >RES TK2790 < 18 >CALC TK2790 = 0 >ASEL >RES TK2840 < 18 >CALC TK2840 = 0 >ASEL >RES TK2940 < 18 >CALC TK2940 = 0 >ASEL >RES TK3020 < 18 >CALC TK3020 = 0 >ASEL >RES TK3170 < 18 >CALC TK3170 = 0 >ASEL >RES TK3210 < 18 >CALC TK3210 = 0 >ASEL >RES TK3240 < 18 >CALC TK3240 = 0 >ASEL >RES TK3250 < 18 >CALC TK3250 = 0 >ASEL >RES TK3272 < 18 >CALC TK3272 = 0 >ASEL >RES TK3320 < 18 >CALC TK3320 = 0 >ASEL >RES TK3330 < 18 >CALC TK3330 = 0 >ASEL >RES TK3370 < 18 >CALC TK3370 = 0 >ASEL >RES TK3490 < 18 >CALC TK3490 = 0 >ASEL >RES TK3500 < 18 >CALC TK3500 = 0 >ASEL >RES TK3510 < 18 >CALC TK3510 = 0 >ASEL >RES TK3590 < 18 >CALC TK3590 = 0 >ASEL >RES TK2660 < 18 >CALC TK2660 = 0 >ASEL >CALC TKA = TK1670 + TK1760 + TK1780 + TK1790 + TK1800 + TK1870 + TK1910 + TK2490 + TK2610 + TK2790 + TK2840 + TK2940 + TK3020 > >CALC TKB = TK3170 + TK3210 + TK3240 + TK3250 + TK3272 + TK3320 + TK3330 + TK3370 + TK3490 + TK3500 + TK3510 + TK3590 + TK2660 > >CALC THICKALL = TKA + TKB > >dissolve thickalln netthick THICKALL poly > >cleanup: >killer_res.aml kills all the res covers copied over and messed with >killer_tk.aml kills all the individual thickness covers dissolved out of > the res covers 2002 The resultant summation coverage was compared to areas containing confidential data, and thickness polygons were edited to remove reference to this data in selected areas. The draft net thickness layer contained numerous small polygons over a wide range of thickness values. To aid display, filesize, and use, this layer was then 'dissolved' into areas of 5-foot thickness increments. -cpk 2002 Metadata imported. withheld Metadata imported. withheld 20040326 10533600 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 ITEM_LABEL ITEM_LABEL String 20 0 0 GISDB_COAL.IL_Net_Thickness_Polys Feature Class 0 NET_THICKN NET_THICKN SmallInteger 2 5 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Shape Shape Geometry 8 Feature geometry. ESRI Coordinates defining the features. 0 0 SHAPE Feature geometry. ESRI Coordinates defining the features. Source Organization String 255 0 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 FID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. st_area(shape) st_area(shape) Double 0 0 0 st_perimeter(shape) st_perimeter(shape) Double 0 0 0 Attribute items are in typical ARC/INFO feature class format. User-defined attributes are: Polygon attributes: >NET_THICKNESS - cumulative (net) coal thickness: > 0 - no coal included (e.g no coal present, mined, > cut-out, not mapped, etc.) > 60 - 18 inches to 5 feet > 120 - 5 to 10 feet > 180 - 10 to 15 feet > 240 - 15 to 20 feet > 300 - 20 to 25 feet > >ITEM_LABEL - text label of above thickness ranges 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 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. Downloadable Data 0.000 0.000 20040325 20030507 Illinois State Geological Survey Christopher P. Korose mailing and physical address

615 East Peabody Drive

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