<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="f25017" name="Middlesex" parent="fUS25" scope="county"/><bt><term thcode="1" code="fUS25" name="Massachusetts" parent="fUS" scope="state"/><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><rt><term thcode="1" code="q43072NWA3" name="Ashburnham" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWB3" name="Ashby" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWD4" name="Ayer" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWF4" name="Billerica" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="h01090003" name="Blackstone" parent="h010900" scope="hydrologic unit"/><term thcode="1" code="q43072SW" name="Boston" parent="q43072" scope="quadrangle 1:100,000 scale"/><term thcode="1" code="q43072SWH1" name="Boston North" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWH2" name="Boston South" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="h01090001" name="Charles" parent="h010900" scope="hydrologic unit"/><term thcode="1" code="h01070005" name="Concord" parent="h010700" scope="hydrologic unit"/><term thcode="1" code="q43072SWF1" name="Concord" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="p527" name="Fort Devens (Closed)" parent="p23" scope="Army"/><term thcode="1" code="q43072SWE2" name="Framingham" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="p1741" name="Great Meadows National Wildlife Refuge" parent="p13" scope="National Wildlife Refuge"/><term thcode="1" code="p133" name="Hanscom Air Force Base" parent="p25" scope="Air Force"/><term thcode="1" code="q43072SWE3" name="Holliston" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWD1" name="Hudson" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWG3" name="Lawrence" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWG1" name="Lexington" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NW" name="Lowell" parent="q43072" scope="quadrangle 1:100,000 scale"/><term thcode="1" code="q43072NWF3" name="Lowell" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWD2" name="Marlborough" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWE1" name="Maynard" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWF3" name="Medfield" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="h01070002" name="Merrimack" parent="h010700" scope="hydrologic unit"/><term thcode="1" code="q43072SWD3" name="Milford" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="h01080202" name="Miller" parent="h010802" scope="hydrologic unit"/><term thcode="1" code="p1334" name="Minute Man National Historical Park" parent="p39" scope="National Historic Park"/><term thcode="1" code="h01070004" name="Nashua" parent="h010700" scope="hydrologic unit"/><term thcode="1" code="q43072NWE3" name="Nashua South" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWF2" name="Natick" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="p598" name="Natick Laboratories Military Reservation" parent="p23" scope="Army"/><term thcode="1" code="q43072SWG2" name="Newton" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWD3" name="Pepperell" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWH4" name="Reading" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWC4" name="Shirley" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072SWC2" name="Shrewsbury" parent="q43072SW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWC3" name="Townsend" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWE4" name="Westford" parent="q43072NW" scope="quadrangle 1:24,000 scale"/><term thcode="1" code="q43072NWG4" name="Wilmington" parent="q43072NW" scope="quadrangle 1:24,000 scale"/></rt></descriptor>