<descriptor thcode="1"><thesaurus thcode="1" name="Common geographic areas" scope="Names and identifiers of commonly-known geographic areas including oceans, continents, countries, states and provinces in North America, counties in the United States, USGS map quadrangles, and hydrologic units, nested and cross-referenced by overlap." creator="U.S. Geological Survey" rights="Public domain" edition="1.0" date="2002-03-21" codetype="alpha" prefix="geo" uri="http://www.usgs.gov/science/CommonGeographicAreas" tblname="geo" nonpref="geonp" relterm="geort" root_code="root" contact="pschweitzer"><category><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="30" name="ambiguous labels" parent="26" scope="A given preferred label may be used for more than one concept in the thesaurus. A concept must be specified using its unique identifier (code). This may occur in the names of places or people."/><term thcode="25" code="4" name="place" parent="2" scope="Terms indicate extent in space, typically by reference as the names of geographic areas known from information that is stored elsewhere."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="30" name="ambiguous labels" parent="26" scope="A given preferred label may be used for more than one concept in the thesaurus. A concept must be specified using its unique identifier (code). This may occur in the names of places or people."/><term thcode="25" code="4" name="place" parent="2" scope="Terms indicate extent in space, typically by reference as the names of geographic areas known from information that is stored elsewhere."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/></category><altlabel><altlabel>Augmented FIPS 10-4 and FIPS 6-4</altlabel><altlabel>Augmented FIPS 10-4 and FIPS 6-4</altlabel><altlabel>CommonGeographicAreas</altlabel><altlabel>CommonGeographicAreas</altlabel></altlabel></thesaurus><term thcode="1" code="fUS17" name="Illinois" parent="fUS" scope="state"/><bt><term thcode="1" code="fUS" name="United States" parent="fLD10" scope="country"/><term thcode="1" code="fLD10" name="North America" parent="fLD" scope="continent"/><term thcode="1" code="fLD" name="Land" parent="root" scope="continent"/><term thcode="1" code="root" name="Earth" scope="Common geographic areas focused on the US"/></bt><nt><term thcode="1" code="f17001" name="Adams" parent="fUS17" scope="county"/><term thcode="1" code="f17003" name="Alexander" parent="fUS17" scope="county"/><term thcode="1" code="f17005" name="Bond" parent="fUS17" scope="county"/><term thcode="1" code="f17007" name="Boone" parent="fUS17" scope="county"/><term thcode="1" code="f17009" name="Brown" parent="fUS17" scope="county"/><term thcode="1" code="f17011" name="Bureau" parent="fUS17" scope="county"/><term thcode="1" code="f17013" name="Calhoun" parent="fUS17" scope="county"/><term thcode="1" code="f17015" name="Carroll" parent="fUS17" scope="county"/><term thcode="1" code="f17017" name="Cass" parent="fUS17" scope="county"/><term thcode="1" code="f17019" name="Champaign" parent="fUS17" scope="county"/><term thcode="1" code="f17021" name="Christian" parent="fUS17" scope="county"/><term thcode="1" code="f17023" name="Clark" parent="fUS17" scope="county"/><term thcode="1" code="f17025" name="Clay" parent="fUS17" scope="county"/><term thcode="1" code="f17027" name="Clinton" parent="fUS17" scope="county"/><term thcode="1" code="f17029" name="Coles" parent="fUS17" scope="county"/><term thcode="1" code="f17031" name="Cook" parent="fUS17" scope="county"/><term thcode="1" code="f17033" name="Crawford" parent="fUS17" scope="county"/><term thcode="1" code="f17035" name="Cumberland" parent="fUS17" scope="county"/><term thcode="1" code="f17039" name="De Witt" parent="fUS17" scope="county"/><term thcode="1" code="f17037" name="DeKalb" parent="fUS17" scope="county"/><term thcode="1" code="f17041" name="Douglas" parent="fUS17" scope="county"/><term thcode="1" code="f17043" name="DuPage" parent="fUS17" scope="county"/><term thcode="1" code="f17045" name="Edgar" parent="fUS17" scope="county"/><term thcode="1" code="f17047" name="Edwards" parent="fUS17" scope="county"/><term thcode="1" code="f17049" name="Effingham" parent="fUS17" scope="county"/><term thcode="1" code="f17051" name="Fayette" parent="fUS17" scope="county"/><term thcode="1" code="f17053" name="Ford" parent="fUS17" scope="county"/><term thcode="1" code="f17055" name="Franklin" parent="fUS17" scope="county"/><term thcode="1" code="f17057" name="Fulton" parent="fUS17" scope="county"/><term thcode="1" code="f17059" name="Gallatin" parent="fUS17" scope="county"/><term thcode="1" code="f17061" name="Greene" parent="fUS17" scope="county"/><term thcode="1" code="f17063" name="Grundy" parent="fUS17" scope="county"/><term thcode="1" code="f17065" name="Hamilton" parent="fUS17" scope="county"/><term thcode="1" code="f17067" name="Hancock" parent="fUS17" scope="county"/><term thcode="1" code="f17069" name="Hardin" parent="fUS17" scope="county"/><term thcode="1" code="f17071" name="Henderson" parent="fUS17" scope="county"/><term thcode="1" code="f17073" name="Henry" parent="fUS17" scope="county"/><term thcode="1" code="f17075" name="Iroquois" parent="fUS17" scope="county"/><term thcode="1" code="f17077" name="Jackson" parent="fUS17" scope="county"/><term thcode="1" code="f17079" name="Jasper" parent="fUS17" scope="county"/><term thcode="1" code="f17081" name="Jefferson" parent="fUS17" scope="county"/><term thcode="1" code="f17083" name="Jersey" parent="fUS17" scope="county"/><term thcode="1" code="f17085" name="Jo Daviess" parent="fUS17" scope="county"/><term thcode="1" code="f17087" name="Johnson" parent="fUS17" scope="county"/><term thcode="1" code="f17089" name="Kane" parent="fUS17" scope="county"/><term thcode="1" code="f17091" name="Kankakee" parent="fUS17" scope="county"/><term thcode="1" code="f17093" name="Kendall" parent="fUS17" scope="county"/><term thcode="1" code="f17095" name="Knox" parent="fUS17" scope="county"/><term thcode="1" code="f17099" name="La Salle" parent="fUS17" scope="county"/><term thcode="1" code="f17097" name="Lake" parent="fUS17" scope="county"/><term thcode="1" code="f17101" name="Lawrence" parent="fUS17" scope="county"/><term thcode="1" code="f17103" name="Lee" parent="fUS17" scope="county"/><term thcode="1" code="f17105" name="Livingston" parent="fUS17" scope="county"/><term thcode="1" code="f17107" name="Logan" parent="fUS17" scope="county"/><term thcode="1" code="f17115" name="Macon" parent="fUS17" scope="county"/><term thcode="1" code="f17117" name="Macoupin" parent="fUS17" scope="county"/><term thcode="1" code="f17119" name="Madison" parent="fUS17" scope="county"/><term thcode="1" code="f17121" name="Marion" parent="fUS17" scope="county"/><term thcode="1" code="f17123" name="Marshall" parent="fUS17" scope="county"/><term thcode="1" code="f17125" name="Mason" parent="fUS17" scope="county"/><term thcode="1" code="f17127" name="Massac" parent="fUS17" scope="county"/><term thcode="1" code="f17109" name="McDonough" parent="fUS17" scope="county"/><term thcode="1" code="f17111" name="McHenry" parent="fUS17" scope="county"/><term thcode="1" code="f17113" name="McLean" parent="fUS17" scope="county"/><term thcode="1" code="f17129" name="Menard" parent="fUS17" scope="county"/><term thcode="1" code="f17131" name="Mercer" parent="fUS17" scope="county"/><term thcode="1" code="f17133" name="Monroe" parent="fUS17" scope="county"/><term thcode="1" code="f17135" name="Montgomery" parent="fUS17" scope="county"/><term thcode="1" code="f17137" name="Morgan" parent="fUS17" scope="county"/><term thcode="1" code="f17139" name="Moultrie" parent="fUS17" scope="county"/><term thcode="1" code="f17141" name="Ogle" parent="fUS17" scope="county"/><term thcode="1" code="f17143" name="Peoria" parent="fUS17" scope="county"/><term thcode="1" code="f17145" name="Perry" parent="fUS17" scope="county"/><term thcode="1" code="f17147" name="Piatt" parent="fUS17" scope="county"/><term thcode="1" code="f17149" name="Pike" parent="fUS17" scope="county"/><term thcode="1" code="f17151" name="Pope" parent="fUS17" scope="county"/><term thcode="1" code="f17153" name="Pulaski" parent="fUS17" scope="county"/><term thcode="1" code="f17155" name="Putnam" parent="fUS17" scope="county"/><term thcode="1" code="f17157" name="Randolph" parent="fUS17" scope="county"/><term thcode="1" code="f17159" name="Richland" parent="fUS17" scope="county"/><term thcode="1" code="f17161" name="Rock Island" parent="fUS17" scope="county"/><term thcode="1" code="f17163" name="Saint Clair" parent="fUS17" scope="county"/><term thcode="1" code="f17165" name="Saline" parent="fUS17" scope="county"/><term thcode="1" code="f17167" name="Sangamon" parent="fUS17" scope="county"/><term thcode="1" code="f17169" name="Schuyler" parent="fUS17" scope="county"/><term thcode="1" code="f17171" name="Scott" parent="fUS17" scope="county"/><term thcode="1" code="f17173" name="Shelby" parent="fUS17" scope="county"/><term thcode="1" code="f17175" name="Stark" parent="fUS17" scope="county"/><term thcode="1" code="f17177" name="Stephenson" parent="fUS17" scope="county"/><term thcode="1" code="f17179" name="Tazewell" parent="fUS17" scope="county"/><term thcode="1" code="f17181" name="Union" parent="fUS17" scope="county"/><term thcode="1" code="f17183" name="Vermilion" parent="fUS17" scope="county"/><term thcode="1" code="f17185" name="Wabash" parent="fUS17" scope="county"/><term thcode="1" code="f17187" name="Warren" parent="fUS17" scope="county"/><term thcode="1" code="f17189" name="Washington" parent="fUS17" scope="county"/><term thcode="1" code="f17191" name="Wayne" parent="fUS17" scope="county"/><term thcode="1" code="f17193" name="White" parent="fUS17" scope="county"/><term thcode="1" code="f17195" name="Whiteside" parent="fUS17" scope="county"/><term thcode="1" code="f17197" name="Will" parent="fUS17" scope="county"/><term thcode="1" code="f17199" name="Williamson" parent="fUS17" scope="county"/><term thcode="1" code="f17201" name="Winnebago" parent="fUS17" scope="county"/><term thcode="1" code="f17203" name="Woodford" parent="fUS17" scope="county"/></nt><rt><term thcode="1" code="q42090" name="Aurora" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q39090" name="Belleville" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q41092" name="Burlington" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="a312" name="Cambrian-Ordovician aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="q42088" name="Chicago" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q41088" name="Danville" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q42092" name="Davenport" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q40090" name="Decatur" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="h0710" name="Des Moines" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="q43092" name="Dubuque" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q37090" name="Dyersburg" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q40088" name="Indianapolis" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="h0713" name="Lower Illinois" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="h0801" name="Lower Mississippi-Hatchie" parent="h08" scope="hydrologic subregion"/><term thcode="1" code="h0514" name="Lower Ohio" parent="h05" scope="hydrologic subregion"/><term thcode="1" code="a109" name="Mississippi River Valley alluvial aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a203" name="Mississippi embayment aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a503" name="Mississippian aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="h0406" name="Northeastern Lake Michigan-Lake Michigan" parent="h04" scope="hydrologic subregion"/><term thcode="1" code="a405" name="Ozark Plateaus aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="q38090" name="Paducah" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q41090" name="Peoria" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q40092" name="Quincy" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q43088" name="Racine" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="h0709" name="Rock" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="q43090" name="Rockford" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="q38092" name="Rolla" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="a410" name="Silurian-Devonian aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a204" name="Southeastern Coastal Plain aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="h0404" name="Southwestern Lake Michigan" parent="h04" scope="hydrologic subregion"/><term thcode="1" code="q39092" name="St Louis" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="h0712" name="Upper Illinois" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="h0708" name="Upper Mississippi-Iowa-Skunk-Wapsipinicon" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="h0714" name="Upper Mississippi-Kaskaskia-Meramec" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="h0706" name="Upper Mississippi-Maquoketa-Plum" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="h0711" name="Upper Mississippi-Salt" parent="h07" scope="hydrologic subregion"/><term thcode="1" code="q39088" name="Vincennes" parent="qroot" scope="quadrangle 1:250,000 scale"/><term thcode="1" code="h0512" name="Wabash" parent="h05" scope="hydrologic subregion"/></rt></descriptor>