[R] Help with Radius problem

Poling, William Po||ngW @end|ng |rom @etn@@com
Wed May 13 11:30:57 CEST 2020


Good morning Bert. I will sign up for r-sig-geo and review your suggested link as well, thank you very much for your response.

WHP




Proprietary

-----Original Message-----
From: Bert Gunter <bgunter.4567 using gmail.com> 
Sent: Tuesday, May 12, 2020 8:30 PM
To: Poling, William <PolingW using aetna.com>
Cc: r-help using r-project.org
Subject: [EXTERNAL] Re: [R] Help with Radius problem

**** External Email - Use Caution ****

No insight But have you consulted:
https://urldefense.proofpoint.com/v2/url?u=https-3A__CRAN.R-2Dproject.org_view-3DSpatial&d=DwIBaQ&c=wluqKIiwffOpZ6k5sqMWMBOn0vyYnlulRJmmvOXCFpM&r=j7MrcIQm2xjHa8v-2mTpmTCtKvneM2ExlYvnUWbsByY&m=gbt_psl_UbXJa0-nqZs2cDd5cTAtzTGE6OOluljG2U0&s=aT7qePkClGUoKBh0QatR5mvySgsYeUp9gU0WLReStTU&e= 

Also, I believe this would be better posted on r-sig-geo, not here.

Bert Gunter

"The trouble with having an open mind is that people keep coming along and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )

On Tue, May 12, 2020 at 5:57 PM Poling, William via R-help <r-help using r-project.org> wrote:
>
> #RStudio Version Version 1.2.1335
> sessionInfo()
> # R version 4.0.0 Patched (2020-05-03 r78349)
> #Platform: x86_64-w64-mingw32/x64 (64-bit) #Running under: Windows 10 
> x64 (build 17763)
>
> Hello I am trying to figure out how to create concentration of ID's in 
> the following data, based on determining the highest concentration in 
> the smallest radius area based on Longitude and Latitude (geo 
> location)
>
> I have reviewed many websites looking for a function or tutorial, (if 
> you are aware of either please let me know)
>
> I have worked through the following to see if they are close to what I need, but they are not.
>
> #Possible use 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__stackoverflow.com
> _questions_21977720_r-2Dfinding-2Dclosest-2Dneighboring-2Dpoint-2Dand-
> 2Dnumber-2Dof-2Dneighbors-2Dwithin-2Da-2Dgiven-2Drad&d=DwIBaQ&c=wluqKI
> iwffOpZ6k5sqMWMBOn0vyYnlulRJmmvOXCFpM&r=j7MrcIQm2xjHa8v-2mTpmTCtKvneM2
> ExlYvnUWbsByY&m=gbt_psl_UbXJa0-nqZs2cDd5cTAtzTGE6OOluljG2U0&s=t6qPeVA_
> C9VbEMtn5earDo2F53CkazDyPAQrL81PifM&e=
>
> #Possible math ref 
> https://urldefense.proofpoint.com/v2/url?u=http-3A__janmatuschek.de_La
> titudeLongitudeBoundingCoordinates&d=DwIBaQ&c=wluqKIiwffOpZ6k5sqMWMBOn
> 0vyYnlulRJmmvOXCFpM&r=j7MrcIQm2xjHa8v-2mTpmTCtKvneM2ExlYvnUWbsByY&m=gb
> t_psl_UbXJa0-nqZs2cDd5cTAtzTGE6OOluljG2U0&s=o5R4BF22ow2gJd8RgJOS0pVRn6
> 6a4uCBcXXgK59Z1SM&e=
>
> #Possible use 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__stackoverflow.com
> _questions_39008850_find-2Dnumber-2Dof-2Dpoints-2Dwithin-2Da-2Dradius-
> 2Din-2Dr-2Dusing-2Dlon-2Dand-2Dlat-2Dcoordinates&d=DwIBaQ&c=wluqKIiwff
> OpZ6k5sqMWMBOn0vyYnlulRJmmvOXCFpM&r=j7MrcIQm2xjHa8v-2mTpmTCtKvneM2ExlY
> vnUWbsByY&m=gbt_psl_UbXJa0-nqZs2cDd5cTAtzTGE6OOluljG2U0&s=cr5fY67h9cmL
> ZlNVPGcJ5gysN_qVQC-xZetElqwYVhk&e=
>
> # 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__gis.stackexchange
> .com_questions_229453_create-2Da-2Dcircle-2Dof-2Ddefined-2Dradius-2Dar
> ound-2Da-2Dpoint-2Dand-2Dthen-2Dfind-2Dthe-2Doverlapping-2Da&d=DwIBaQ&
> c=wluqKIiwffOpZ6k5sqMWMBOn0vyYnlulRJmmvOXCFpM&r=j7MrcIQm2xjHa8v-2mTpmT
> CtKvneM2ExlYvnUWbsByY&m=gbt_psl_UbXJa0-nqZs2cDd5cTAtzTGE6OOluljG2U0&s=
> xK2iPfFjKfUevj39Uk8ux2OZYYxE3N4kOQU3ecP0W4M&e=
>
> # 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__stackoverflow.com
> _questions_23071026_drawing-2Da-2Dcircle-2Dwith-2Da-2Dradius-2Dof-2Da-
> 2Ddefined-2Ddistance-2Din-2Da-2Dmap_23072079-2323072079&d=DwIBaQ&c=wlu
> qKIiwffOpZ6k5sqMWMBOn0vyYnlulRJmmvOXCFpM&r=j7MrcIQm2xjHa8v-2mTpmTCtKvn
> eM2ExlYvnUWbsByY&m=gbt_psl_UbXJa0-nqZs2cDd5cTAtzTGE6OOluljG2U0&s=susH1
> Qr4Cz3oohO3OF6Bs6PWuAzo5hc7WMQccLvuX08&e=
>
> My actual data is 2353 records with 41 states and 1337 cities represented. Here is a sample below.
>
> Some might call this a hotspot question I suppose: "What is the maximum number of ID's I can gather in the smallest radius size given the data at hand?
>
> For example it would be useful to have a function that I could use to test different combinations of radius size and concentration of ID #'s by geo location.
>
> Any insight would be very much appreciated.
>
> Thank you.
> WHP
>
> str(sample)
> 'data.frame':   35 obs. of  5 variables:
>  $ state    : Factor w/ 41 levels "AL","AR","AZ",..: 19 29 9 9 10 30 33 35 41 12 ...
>  $ city     : Factor w/ 1337 levels "ABBOTTSTOWN",..: 281 1280 129 223 989 721 550 731 1325 688 ...
>  $ latitude : num  43.5 40.1 26.5 27.9 31.9 ...
>  $ longitude: num  -70.6 -82.9 -80.1 -82.7 -81.4 ...
>  $ ID       : int  2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 ...
>
> dput(sample)
> structure(list(state = structure(c(19L, 29L, 9L, 9L, 10L, 30L, 33L, 
> 35L, 41L, 12L, 12L, 36L, 4L, 9L, 8L, 39L, 36L, 36L, 41L, 28L, 12L, 
> 28L, 28L, 12L, 11L, 2L, 12L, 22L, 32L, 22L, 12L, 10L, 10L, 22L, 10L), 
> .Label = c("AL", "AR", "AZ", "CA", "CO", "CT", "DC", "DE", "FL", "GA", 
> "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "ME", "MI", "MN", 
> "MO", "NC", "NE", "NJ", "NM", "NV", "NY", "OH", "OK", "OR", "PA", 
> "SC", "SD", "TN", "TX", "UT", "VA", "WA", "WI", "WV"), class = 
> "factor"), city = structure(c(281L, 1280L, 129L, 223L, 989L, 721L, 
> 550L, 731L, 1325L, 688L, 1184L, 281L, 759L, 1171L, 1305L, 587L, 272L, 
> 581L, 263L, 152L, 217L, 152L, 390L, 5L, 571L, 1006L, 1162L, 939L, 
> 170L, 1033L, 1002L, 586L, 586L, 192L, 586L), .Label = c("ABBOTTSTOWN", 
> "ABILENE", "ACWORTH", "ADAMS", "ADDISON", "ADKINS", "ALBANY", "ALBIA", 
> "ALBUQUERQUE", "ALEXANDRIA", "ALFRED", "ALIQUIPPA", "ALISO VIEJO", 
> "ALLEN PARK", "ALLENTOWN", "ALPHA", "ALPHARETTA", "ALPINE", "ALTOONA", 
> "AMARILLO", "AMBLER", "AMBRIDGE", "AMHERST", "AMITYVILLE", "ANAHIEM", 
> "ANDERSON", "ANDOVER", "ANGIER", "ANGLETON", "ANKENY", "ANN ARBOR", 
> "ANZA", "APEX", "APOLLO", "ARCADIA", "ARCHDALE", "ARDMORE", "ARGYLE", 
> "ARKANSAS CITY", "ARLINGTON", "ARNOLD", "ARTHUR", "ASHEBORO", 
> "ASHEVILLE", "ASHLAND", "ASHLAND CITY", "ASHTON", "ASTON", "ATHENS", 
> "ATLANTA", "ATLANTIC BCH", "AUBORN", "AUGUSTA", "AURORA", "AUSTELL", 
> "AUSTIN", "AVENTURA", "AVONDALE ESTATES", "BAKERSFIELD", "BALDWIN 
> CITY", "BALDWIN PLACE", "BALLWIN", "BANGOR", "BARBOURSVILLE", 
> "BARNEGAT", "BARTLETT", "BARTON", "BARTONVILLE", "BASSETT", "BATAVIA", 
> "BATESBURG", "BATON ROUGE", "BAXTER SPRINGS", "BAY CITY", "BAYONNE", 
> "BAYSIDE", "BAYTOWN", "BEAR", "BEAUMONT", "BEECH CREEK", "BEECHER 
> CITY", "BELFAIR", "BELLE VERNON", "BELLEAIR", "BELLEVUE", "BELLMAWR", 
> "BELLMORE", "BELLWOOD", "BELMAR", "BELMONT", "BELVIDERE", "BENNET", 
> "BENTON", "BENTONVILLE", "BERLIN", "BESSEMER CITY", "BETHANY", 
> "BETHEL", "BETHEL PARK", "BETHESDA", "BETHLEHEM", "BETTENDORF", 
> "BIGLERVILLE", "BINGHAMTON", "BIRDSBORO", "BIWABIK", "BLACK MOUNTAIN", 
> "BLACKSBURG", "BLAINE", "BLAIRSVILLE", "BLAKESLEE", "BLOOMFIELD", 
> "BLUE BELL", "BLUE GRASS", "BLUE POINT", "BLUE SPRINGS", "BOCA RATON", 
> "BODFISH", "BOILING SPRINGS", "BOLIVAR", "BON AQUA", "BONNER SPRINGS", 
> "BONNEY LAKE", "BOONEVILLE", "BOSSIER CITY", "BOUNTIFUL", "BOWLING 
> GREEN", "BOYERTOWN", "BOYNTON BEACH", "BRADENTON", "BRADENVILLE", 
> "BRANDAMORE", "BRANDON", "BRANFORD", "BRANSON", "BRASELTON", 
> "BREEZEWOOD", "BRENTON", "BRENTWOOD", "BREWSTER", "BRICK", 
> "BRIDGEPORT", "BRIDGETON", "BRIGHAM CITY", "BROADDUS", "BROCKPORT", 
> "BROGUE", "BROKEN ARROW", "BRONX", "BROOKFIELD", "BROOKHAVEN", 
> "BROOKLYN", "BROWNS MILLS", "BROWNSBURG", "BROWNSVILLE", "BRUNSWICK", 
> "BRYAN", "BUCKSPORT", "BUDD LAKE", "BUFFALO", "BULVERDE", 
> "BUNKERVILLE", "BURBANK", "BURFORD", "BURIEN", "BURLINGTON", "BURR 
> RIDGE", "BURTON", "BUSKIRK", "BUTLER", "BUXTON", "BYRON", "CALERA", 
> "CAMBRIDGE", "CAMP HILL", "CAMPBELL", "CANAAN", "CANAL WINCHESTER", 
> "CANASTOTA", "CANTON", "CARDIFF BY THE SEA", "CARL JUNCTION", 
> "CARLISLE", "CARLTON", "CAROL STREAM", "CARROLLTON", "CARSON CITY", 
> "CARTERSVILLE", "CARTHAGE", "CARY", "CASEYVILLE", "CASSVILLE", 
> "CASWELL", "CATO", "CEDAR RAPIDS", "CEDARBURG", "CEDARVILLE", "CENTER 
> POINT", "CENTERTON", "CENTRAL ISLIP", "CENTRAL POINT", "CHAGRIN 
> FALLS", "CHALFONT", "CHAPEL HILL", "CHAPIN", "CHARDON", "CHARITON", 
> "CHARLESTON", "CHARLOTTE", "CHEROKEE", "CHERRY HILL", "CHERRY VALLEY", 
> "CHESHIRE", "CHEST SPRINGS", "CHESTER", "CHESTERTON", "CHICAGO", 
> "CHILLICOTHE", "CHOCTAW", "CICERO", "CINCINNATI", "CLAY", 
> "CLEARWATER", "CLEARWATER BEACH", "CLEMMONS", "CLENDENIN", 
> "CLEVELAND", "CLEVELAND HTS", "CLEVES", "CLIFFSIDE PARK", "CLIFTON", 
> "CLIFTON PARK", "CLIFTON SPGS", "CLINTON", "COACHELLA", "COAL 
> TOWNSHIP", "COATESVILLE", "COLLEGE STATION", "COLLINSVILLE", 
> "COLONIA", "COLUMBIA", "COLUMBUS", "COMMERCE", "CONCORD", "CONCORD 
> TOWNSHIP", "CONNELLSVILLE", "CONROE", "CONWAY", "CONYERS", 
> "COOKEVILLE", "COON RAPIDS", "CORAOPOLIS", "CORDOVA", "CORNELIUS", 
> "CORNWALL", "CORONADO", "CORPUS CHRISTI", "CORRY", "COTTAGE HILLS", 
> "COTTLEVILLE", "COTTONWOOD", "COVINGTON", "COWEN", "CRANBERRY 
> TOWNSHIP", "CROWN POINT", "CUBA", "CUMBERLAND CENTER", "CUMBERLAND 
> FORESIDE", "CUMMING", "CUYAHOGA FLS", "CYPRESS", "DALLAS", 
> "DALLASTOWN", "DANBURY", "DANIA BCH", "DANVILLE", "DAVENPORT", 
> "DAVIE", "DAVIS JUNCTION", "DAWSON", "DAYTON", "DE SOTO", "DECATUR", 
> "DEFIANCE", "DEFOREST", "DELAVAN", "DELMAR", "DELRAY BEACH", 
> "DEMOTTE", "DENISON", "DENVER", "DEPTFORD", "DERBY", "DERRY", "DES 
> MOINES", "DETROIT", "DICKINSON", "DILLSBURG", "DITTMER", "DIXON", 
> "DONNA", "DOTHAN", "DOUGLAS", "DOUGLASVILLE", "DOVER", "DOYLESTOWN", 
> "DREXEL HILL", "DUBLIN", "DUCHESNE", "DULUTH", "DUNCAN", "DUNCANNON", 
> "DUNCANSVILLE", "DUNEDIN", "DUNNSVILLE", "DURHAM", "DUTTON", "EAGLE 
> GROVE", "EAST AURORA", "EAST CHICAGO", "EAST EARL", "EAST HANOVER", 
> "EAST HARTFORD", "EAST HARTLAND", "EAST LEROY", "EAST LIVERPOOL", 
> "EAST MEADOW", "EAST NORTHPORT", "EAST ORANGE", "EAST PEORIA", "EAST 
> SAINT LOUIS", "EASTON", "EDGERTON", "EDISON", "EDMOND", "EGG HBR TWP", 
> "EL DORADO", "EL PASO", "ELDRIDGE", "ELGIN", "ELIZABETHVILLE", 
> "ELLISVILLE", "ELLSWORTH", "ELLWOOD CITY", "ELMHURST", "ELMWOOD PARK", 
> "ELOY", "ELY", "EMERSON", "EMORY", "ENDICOTT", "ENGLEWOOD", "ENID", 
> "ENNICE", "ENOLA", "ENUMCLAW", "EPHRATA", "ERIE", "ESTERO", "EUREKA 
> SPRINGS", "EVANSVILLE", "EVERETT", "EXCELSIOR SPRINGS", "EXTON", 
> "FAIRFAX", "FAIRFIELD", "FAIRHAVEN", "FAIRVIEW", "FAIRVIEW PARK", 
> "FALMOUTH", "FAR HILLS", "FAR ROCKAWAY", "FARMINGDALE", "FARMINGTON", 
> "FAYETTE", "FAYETTEVILLE", "FELTON", "FENTON", "FERGUSON", "FIELDALE", 
> "FINDLAY", "FINGERVILLE", "FLEMINGTON", "FLINT", "FLORENCE", 
> "FLORESVILLE", "FLORISSANT", "FLOVILLA", "FLOWER MOUND", "FLUSHING", 
> "FOGELSVILLE", "FOLSOM", "FONTANELLE", "FOREST HILLS", "FOREST PARK", 
> "FORT DODGE", "FORT FAIRFIELD", "FORT GAY", "FORT LAUDERDALE", "FORT 
> LEE", "FORT MILL", "FORT MOHAVE", "FORT PAYNE", "FORT PIERCE", "FORT 
> SMITH", "FORT WAYNE", "FORT WORTH", "FOSTORIA", "FOUNTAIN INN", 
> "FRANKFORT", "FRANKLIN", "FREEDOM", "FREEHOLD", "FREEPORT", "FREMONT", 
> "FULLERTON", "FULSHEAR", "FULTON", "GADSDEN", "GAFFNEY", 
> "GAINESVILLE", "GALLOWAY", "GARDEN PRAIRIE", "GARDNERS", "GARNETT 
> VALLEY", "GARY", "GASTON", "GASTONIA", "GENEVA", "GETTYSBURG", 
> "GIBSONIA", "GILBERT", "GIRARD", "GLEN BURNIE", "GLEN CARBON", "GLEN 
> COVE", "GLEN MILLS", "GLENSHAW", "GLENVIEW", "GLENWOOD", "GOLDEN 
> CITY", "GOLIAD", "GOODSON", "GOODYEAR", "GORHAM", "GOSHEN", 
> "GRANBURY", "GRANBY", "GRAND PRAIRIE", "GRAND RAPIDS", "GRANDVIEW", 
> "GRANITE CITY", "GRANITE FALLS", "GRANTS PASS", "GRASS VALLEY", 
> "GRAVETTE", "GRAYSVILLE", "GREEN LANE", "GREENBRIER", "GREENLAWN", 
> "GREENSBORO", "GREENSBURG", "GREENUP", "GREENVILLE", "GREER", 
> "GRIFFIN", "GRIFFITH", "GROTON", "GUADALUPE", "GUILFORD", "HADLEY", 
> "HAGAN", "HALF WAY", "HALLANDALE BEACH", "HAMBLETON", "HAMBURG", 
> "HAMDEN", "HAMILTON", "HAMMOND", "HAMMONTON", "HAMPSHIRE", 
> "HAPEVILLE", "HARBORCREEK", "HARLAN", "HARRISBURG", "HARRISON", 
> "HARRISONVILLE", "HARTWELL", "HASTINGS", "HATFIELD", "HAVERHILL", 
> "HAWK POINT", "HAYESVILLE", "HELEN", "HENDERSON", "HENDERSONVILLE", 
> "HENRICO", "HENRIETTA", "HERMITAGE", "HERNDON", "HERSHEY", "HIALEAH", 
> "HIAWATHA", "HIBBING", "HICKORY", "HICKORY GROVE", "HIDDENITE", "HIGH 
> HILL", "HIGH POINT", "HIGH RIDGE", "HIGHLAND", "HIGHLAND MILLS", 
> "HINCKLEY", "HIRAM", "HOBART", "HOLBROOK", "HOLDEN", "HOLDENVILLE", 
> "HOLLADAY", "HOLLIS", "HOLLY SPRINGS", "HOLLYWOOD", "HOLTWOOD", 
> "HOMER", "HOMESTEAD", "HONEYVILLE", "HOPE MILLS", "HOT SPRINGS", "HOT 
> SPRINGS NATIONAL PARK", "HOUSTON", "HUBBARD", "HUDSON", "HUFFMAN", 
> "HULL", "HUMANSVILLE", "HUNTERSVILLE", "HUNTINGDON", "HUNTINGTON 
> BEACH", "HUNTS POINT", "HURDLE MILLS", "HURRICANE", "HURST", 
> "IMPERIAL", "INDEPENDENCE", "INDIAN SHORES", "INDIAN TRAIL", 
> "INDIANA", "INDIANAPOLIS", "INDIANOLA", "INMAN", "IOWA CITY", "IRMO", 
> "IRVINGTON", "IRWIN", "ISANTI", "ISLESBORO", "ISLIP", "ISSAQUAH", 
> "ITHACA", "JACKSBORO", "JACKSON", "JACKSON HTS", "JACKSONVILLE", 
> "JAMAICA", "JAMESTOWN", "JASPER", "JEANNETTE", "JEFFERSON", "JEFFERSON 
> CITY", "JEWELL", "JOHNSTON", "JOHNSTOWN", "JONESBORO", "JONESPORT", 
> "JONESTOWN", "JOPLIN", "JUPITER", "KANKAKEE", "KANNAPOLIS", "KANSAS 
> CITY", "KATY", "KEARNEY", "KELLERTON", "KEMAH", "KENMORE", "KENNESAW", 
> "KENT", "KINGMAN", "KINGS MOUNTAIN", "KINGSLAND", "KINGSTON", 
> "KINGWOOD", "KIRKLAND", "KUTZTOWN", "LA QUINTA", "LA RUE", "LA VERNE", 
> "LAFAYETTE", "LAKE BLUFF", "LAKE IN THE HILL", "LAKE ISABELLA", "LAKE 
> PLACID", "LAKE SAINT LOUIS", "LAKE TAPPS", "LAKE VILLAGE", "LAKE 
> WAUKOMIS", "LAKE WORTH", "LAKEBAY", "LAKELAND", "LAKEWOOD", "LAKEWOOD 
> RCH", "LAMBERTVILLE", "LANCASTER", "LANDISVILLE", "LANSDALE", 
> "LAREDO", "LARGO", "LAS VEGAS", "LATROBE", "LAUDERHILL", "LAWNDALE", 
> "LAWRENCE", "LAWRENCEVILLE", "LE MARS", "LE ROY", "LEAGUE CITY", 
> "LEAVENWORTH", "LEAWOOD", "LEBANON", "LECOMPTON", "LEECHBURG", "LEES 
> SUMMIT", "LEESBURG", "LEESVILLE", "LEETONIA", "LENEXA", "LENOIR", 
> "LEVITTOWN", "LEWES", "LEWISTOWN", "LEXINGTON", "LIBERTY TWP", 
> "LILLINGTON", "LINCOLN", "LINDENHURST", "LINTON", "LISBON", 
> "LITCHFIELD PK", "LITHIA", "LITITZ", "LITTLE EGG HARBOR TO", "LK 
> FOREST PK", "LK PEEKSKILL", "LOCKHART", "LOCKWOOD", "LOGAN", "LOMA 
> LINDA", "LONE JACK", "LONG BEACH", "LONG LANE", "LONGVIEW", "LORAIN", 
> "LORTON", "LOS ANGELES", "LOUISBURG", "LOVES PARK", "LOWER BURRELL", 
> "LOWRY CITY", "LUBBOCK", "LUGOFF", "LUMBERTON", "LYNBROOK", 
> "LYNNWOOD", "MACHESNEY PARK", "MACON", "MAGNOLIA", "MAHOPAC", 
> "MAHWAH", "MAINEVILLE", "MALVERN", "MALVERNE", "MANASSAS", "MANCHACA", 
> "MANCHESTER", "MANCHESTER TOWNSHIP", "MANCHESTER TW", "MANHEIM", 
> "MANITO", "MANLIUS", "MANNINGTON", "MANSFIELD", "MANSURA", "MAPLE 
> PARK", "MARBLE FALLS", "MARCELLUS", "MARICOPA", "MARIETTA", "MARION", 
> "MARKLEYSBURG", "MARS HILL", "MARSHALLTOWN", "MARSHFIELD", 
> "MARSHVILLE", "MARTINSVILLE", "MARYSVILLE", "MASON CITY", "MASSEY", 
> "MASSILLON", "MASURY", "MATAWAN", "MATEWAN", "MATTAPOISETT", 
> "MATTHEWS", "MAYFIELD HTS", "MAYSEL", "MC CLELLAND", "MC DONALD", "MC 
> KEES ROCKS", "MC SHERRYSTOWN", "MC VEYTOWN", "MCALESTER", "MCDONOUGH", 
> "MCKEESPORT", "MCKINNEY", "MECHANICSBURG", "MECHANICSVILLE", 
> "MEDFORD", "MEDIA", "MEDWAY", "MELVILLE", "MEMPHIS", "MERIDEN", 
> "MERRIAM", "MERRICK", "MERRILL", "MERRILLVILLE", "MESA", "MESQUITE", 
> "MIAMI", "MIAMI GARDENS", "MICHIGAN CITY", "MIDDLETOWN", "MIDLAND", 
> "MIFFLINTOWN", "MILFORD", "MILL CREEK", "MILLBROOK", "MILLEDGEVILLE", 
> "MILLINOCKET", "MILNER", "MILTON", "MILWAUKEE", "MINEOLA", "MINERAL 
> SPGS", "MINERAL WELLS", "MINNEAPOLIS", "MISSION", "MISSION HILLS", 
> "MISSION VIEJO", "MISSOURI CITY", "MISSOURI VALLEY", "MOLINE", 
> "MONESSEN", "MONROE", "MONROE TOWNSHIP", "MONROEVILLE", "MONTCLAIR", 
> "MONTEREY", "MONTICELLO", "MOORESVILLE", "MORGANTON", "MORGANTOWN", 
> "MORRIS PLAINS", "MOUND", "MOUND CITY", "MOUNT HOPE", "MOUNT JOY", 
> "MOUNT LAUREL", "MOUNT PLEASANT", "MOUNT POCONO", "MOUNT UNION", 
> "MOUNT WOLF", "MOUNTVILLE", "MT HOLLY", "MT PLEASANT", "MULVANE", 
> "MUNCIE", "MUNSTER", "MURFREESBORO", "MURRAY", "MURRELLS INLT", 
> "MUSTANG", "MYERSTOWN", "MYSTIC", "N BRANFORD", "N FT MYERS", 
> "NAPERVILLE", "NAPLES", "NAPOLEON", "NASHVILLE", "NATCHITOCHES", 
> "NAUGATUCK", "NEOSHO", "NEPTUNE BEACH", "NESCONSET", "NETCONG", "NEW 
> BLOOMFIELD", "NEW BRAUNFELS", "NEW BRITAIN", "NEW BRUNSWICK", "NEW 
> CASTLE", "NEW CUMBERLAND", "NEW HAVEN", "NEW KENSINGTON", "NEW 
> LONDON", "NEW ORLEANS", "NEW PRESTON", "NEW PROVIDENCE", "NEW 
> ROCHELLE", "NEW TRIPOLI", "NEW ULM", "NEW WINDSOR", "NEW YORK", 
> "NEWARK", "NEWBURGH HEIGHTS", "NEWINGTON", "NEWNAN", "NEWPORT", 
> "NEWPORT BEACH", "NEWTON", "NEWTONVILLE", "NIAGARA FALLS", "NIXA", 
> "NOANK", "NOKOMIS", "NORCROSS", "NORFOLK", "NORMAN", "NORMANDY PARK", 
> "NORTH BABYLON", "NORTH HAVEN", "NORTH HUNTINGDON", "NORTH JACKSON", 
> "NORTH LITTLE ROCK", "NORTH MIAMI", "NORTH PORT", "NORTH RICHLAND 
> HILLS", "NORTH WALES", "NORTH WATERBORO", "NORTHFIELD", "NORTHRIDGE", 
> "NORTON", "NORWALK", "NOTTINGHAM", "NUTLEY", "NYACK", "O FALLON", "OAK 
> RIDGE", "OAKDALE", "OCALA", "OCEANSIDE", "OCILLA", "OLATHE", "OMAHA", 
> "OMRO", "ONA", "ONALASKA", "OPA LOCKA", "ORADLL", "ORION", "ORONO", 
> "ORRINGTON", "OSCEOLA", "OSKALOOSA", "OSSINING", "OSWEGO", "OTTAWA", 
> "OVALO", "OVERLAND PARK", "OWASSO", "OWEGO", "OXFORD", "OYSTER BAY", 
> "OZARK", "PALERMO", "PALM CITY", "PALM HARBOR", "PALMDALE", "PALMYRA", 
> "PALOS HEIGHTS", "PANA", "PAOLA", "PARK RIDGE", "PARLIN", "PARMA", 
> "PARRISH", "PARROTT", "PATASKALA", "PAULS VALLEY", "PAXTON", "PEA 
> RIDGE", "PEARLAND", "PECULIAR", "PEEKSKILL", "PEKIN", "PELION", 
> "PEMBROKE", "PEMBROKE PINES", "PENN YAN", "PENNELLVILLE", "PENNSBURG", 
> "PENNSVILLE", "PEORIA", "PERRY", "PERRYOPOLIS", "PERRYSBURG", 
> "PERRYVILLE", "PHARR", "PHILADELPHIA", "PHILIPPI", "PHOENIX", 
> "PICKENS", "PICKERINGTON", "PIERSON", "PILOT MOUNTAIN", "PINE BLUFF", 
> "PINE HILL", "PINEVILLE", "PINNELLAS PARK", "PISCATAWAY", "PITMAN", 
> "PITTSBURGH", "PLACIDA", "PLAINFIELD", "PLANO", "PLANT CITY", 
> "PLATTEKILL", "PLEASANT HILL", "PLEASANT HOPE", "PLYMOUTH", "POCONO 
> LAKE", "POMFRET CENTER", "POMPANO BEACH", "POOLER", "PORT CARBON", 
> "PORT CHARLOTTE", "PORT NORRIS", "PORT ORANGE", "PORT SAINT LUCIE", 
> "PORT WASHINGTON", "PORTAGE", "PORTER", "PORTERSVILLE", "PORTLAND", 
> "POTTSVILLE", "POUGHKEEPSIE", "POWDER SPRINGS", "POWELL", "PRAIRIE 
> VILLAGE", "PRESCOTT", "PRESCOTT VALLEY", "PRINCETON", "PROSPECT", "PT 
> PLEASANT", "PUNTA GORDA", "PURCHASE", "QUAKERTOWN", "QUEENS VLG", 
> "QUINCY", "RALEIGH", "RANDLEMAN", "RANDOLPH", "RAYTOWN", "READING", 
> "READLYN", "RED BANK", "RED HOUSE", "RED LION", "REEDERS", "REGO 
> PARK", "REHOBOTH BCH", "REIDSVILLE", "RENO", "RENTON", "REPUBLIC", 
> "RICH HILL", "RICHARDS", "RICHMOND", "RICHMOND HILL", "RIDGEWOOD", 
> "RINCON", "RIO GRANDE CITY", "RIO RANCHO", "RIVERDALE", "RIVERHEAD", 
> "RIVERSIDE", "ROANOKE", "ROCHELLE", "ROCHESTER", "ROCK HILL", 
> "ROCKAWAY BCH", "ROCKFORD", "ROCKMART", "ROCKY HILL", "ROCKY MOUNT", 
> "ROGERS", "ROGERSVILLE", "ROMULUS", "ROOSEVELT", "ROSAMOND", "ROSCOE", 
> "ROSENBERG", "ROSENDALE", "ROSWELL", "ROTONDA WEST", "ROUGEMONT", 
> "ROXBORO", "ROY", "RUNNELLS", "RURAL HALL", "RUSH VALLEY", "RUSKIN", 
> "RUSTBURG", "RUTHER GLEN", "RUTHERFORDTON", "S DEERFIELD", "SACO", 
> "SAGINAW", "SAINT AUGUSTINE", "SAINT CHARLES", "SAINT CLAIR", "SAINT 
> CLAIRSVILLE", "SAINT LOUIS", "SAINT MARYS", "SAINT MATTHEWS", "SAINT 
> PAULS", "SAINT PETERS", "SAINT PETERSBURG", "SALEM", "SALISBURY", 
> "SALT LAKE CITY", "SALTSBURG", "SALUNGA", "SAMMAMISH", "SAN ANTONIO", 
> "SAN BENITO", "SAN CLEMENTE", "SAN DIEGO", "SAN ELIZARIO", "SAN JUAN", 
> "SANDUSKY", "SANDY", "SANFORD", "SANGERVILLE", "SANTA ANA", 
> "SARASOTA", "SARATOGA SPRINGS", "SARCOXIE", "SAUGUS", "SAVANNAH", 
> "SAYVILLE", "SCALY MOUNTAIN", "SCHAEFFERSTOWN", "SCHULENBURG", 
> "SCOTT", "SCOTTSDALE", "SEAFORD", "SEALE", "SEATTLE", "SEDONA", 
> "SEGUIN", "SELDEN", "SENECA", "SENOIA", "SEVEN VALLEYS", "SEYMOUR", 
> "SHARON", "SHARPSBURG", "SHARPSVILLE", "SHAVANO PARK", "SHAWNEE", 
> "SHELLSBURG", "SHELTON", "SHENANDOAH", "SHORELINE", "SHOREWOOD", 
> "SHREVEPORT", "SICKLERVILLE", "SILER CITY", "SILOAM SPRINGS", "SIMON", 
> "SIMPSONVILLE", "SIMSBURY", "SIOUX CITY", "SIOUX FALLS", "SKOKIE", 
> "SKOWHEGAN", "SLATINGTON", "SLIDELL", "SMITHFIELD", "SN BERNRDNO", 
> "SNELLVILLE", "SOCORRO", "SOMERS", "SOPHIA", "SOUTH AMBOY", "SOUTH 
> BELOIT", "SOUTH BEND", "SOUTH DARTMOUTH", "SOUTH HOUSTON", "SOUTH 
> PARK", "SOUTH PLAINFIELD", "SOUTH SIOUX CITY", "SOUTHAMPTON", 
> "SOUTHBURY", "SOUTHGATE", "SPARKS", "SPARROW BUSH", "SPENCER", 
> "SPRING", "SPRING BRANCH", "SPRING GROVE", "SPRING HILL", "SPRING 
> HOPE", "SPRING VALLEY", "SPRINGDALE", "SPRINGFIELD", "SPRINGFIELD 
> GARDENS", "SPRINGHILL", "SPRINGTOWN", "SPRNGFLD GDNS", "SPRUCE PINE", 
> "ST PETERSBURG", "ST. GEORGE", "STAFFORD", "STAMFORD", "STANDISH", 
> "STANLEY", "STANTON", "STATEN ISLAND", "STATESVILLE", "STERLING", 
> "STILLMAN VALLEY", "STILWELL", "STOCKBRIDGE", "STOCKTON", "STONE MTN", 
> "STRAFFORD", "STRATFORD", "STRONGSVILLE", "STROUDSBURG", "STRUTHERS", 
> "SUFFIELD", "SUGAR HILL", "SUGAR LAND", "SULPHUR", "SUMMERVILLE", 
> "SUMMIT", "SUN CITY", "SUNBURY", "SUWANEE", "SWANSEA", "SWANTON", 
> "SWEENY", "SWISSVALE", "SYCAMORE", "SYLVANIA", "SYRACUSE", "TACOMA", 
> "TAFTVILLE", "TAMPA", "TAPPAHANNOCK", "TAR HEEL", "TAUNTON", 
> "TAYLORVILLE", "TECUMSEH", "THE WOODLANDS", "THEODOSIA", "THOMASTON", 
> "THOMASVILLE", "TIERRA VERDE", "TIFTON", "TILLSON", "TILTON", "TINLEY 
> PARK", "TOCCOA", "TOLEDO", "TOLLAND", "TOMBALL", "TOMS RIVER", 
> "TOPEKA", "TOPSHAM", "TORRINGTON", "TOVEY", "TOWNSEND", "TRAVELERS 
> RST", "TRENT", "TRINITY", "TROUTMAN", "TROY", "TRUMBULL", "TUCKER", 
> "TULALIP", "TURNER", "TUSCUMBIA", "TYRONE", "UNION", "UNION CITY", 
> "UNIVERSAL CTY", "UNIVERSITY HTS", "UPPR CHICHSTR", "URBANA", 
> "URBANDALE", "UTICA", "VAIL", "VALE", "VALENCIA", "VALPARAISO", "VAN 
> BUREN", "VAN METER", "VAN WERT", "VANDERGRIFT", "VASSALBORO", 
> "VAUGHN", "VENICE", "VERNAL", "VERNON", "VERONA", "VICTOR", "VIDALIA", 
> "VIENNA", "VILLA GROVE", "VILLA RIDGE", "VOLANT", "W HAMPTON BCH", "W 
> TERRE HAUTE", "WADSWORTH", "WAHOO", "WAKE FOREST", "WALDEN", 
> "WALLINGFORD", "WALLINGTON", "WALNUT COVE", "WANAQUE", "WARFORDSBURG", 
> "WARMINSTER", "WARREN", "WARSAW", "WARTHEN", "WASHINGTON", "WASOLA", 
> "WATAUGA", "WATERBURY", "WATERFORD", "WATERLOO", "WATERVILLE", 
> "WATKINS GLEN", "WAXAHACHIE", "WAYCROSS", "WAYNESBORO", "WEBSTER", 
> "WEIRTON", "WELLSBORO", "WELLSVILLE", "WENTZVILLE", "WESLACO", "WEST 
> CHESTER", "WEST DEPTFORD", "WEST DES MOINES", "WEST HAVEN", "WEST 
> HICKORY", "WEST LIBERTY", "WEST MIFFLIN", "WEST PALM BEACH", "WEST 
> POINT", "WEST READING", "WEST SENECA", "WEST SUFFIELD", "WEST VALLEY 
> CITY", "WESTERVILLE", "WESTHAMPTON", "WESTMINSTER", "WESTMORELAND 
> CITY", "WESTPORT", "WESTVILLE", "WETHERSFIELD", "WHARTON", "WHEELING", 
> "WHITE PLAINS", "WHITEHALL", "WHITESTONE", "WHITESTOWN", "WHITING", 
> "WHITMAN", "WHITTIER", "WICHITA", "WILDWOOD", "WILLARD", 
> "WILLIAMSBURG", "WILLIAMSPORT", "WILLOW GROVE", "WILLOWBROOK", 
> "WILLOWICK", "WILMETTE", "WILMINGTON", "WILSON", "WILTON MANORS", 
> "WIMBERLEY", "WINDCREST", "WINDER", "WINNEBAGO", "WINSIDE", "WINSTON", 
> "WINSTON SALEM", "WINTERSET", "WINTHROP", "WOLCOTT", "WOODBRIDGE", 
> "WOODBURY HEIGHTS", "WOODLAND PARK", "WOODLAWN", "WOODS CROSS", 
> "WOODSIDE", "WOODSTOCK", "WORTHINGTON", "WYOMISSING", "YARMOUTH", 
> "YOE", "YONKERS", "YORK", "YORKTOWN", "YORKTOWN HEIGHTS", "YOUNG HARRIS", "YOUNGSTOWN", "YPSILANTI", "ZELIENOPLE", "ZEPHYRHILLS"), class = "factor"),
>     latitude = c(43.53462, 40.142492, 26.538149, 27.9062, 31.90104,
>     34.833083, 35.118836, 35.136047, 39.425712, 40.519207, 40.101126,
>     30.044457, 33.62287, 27.910276, 39.752254, 47.403778, 32.961929,
>     29.820199, 38.408649, 40.668828, 41.983948, 40.58116, 40.7253,
>     41.921667, 41.669921, 36.442552, 38.564663, 37.455315, 40.867774,
>     38.783554, 42.244381, 34.024332, 34.001644, 36.622704, 34.017832
>     ), longitude = c(-70.58809, -82.888789, -80.113071, -82.6661,
>     -81.372992, -95.840964, -82.016013, -89.92625, -80.276676,
>     -89.778385, -87.641063, -94.888036, -117.663119, -82.530568,
>     -75.574437, -122.209047, -96.799309, -95.746255, -80.553953,
>     -73.923314, -87.713482, -73.9731, -73.8187, -87.987023, -93.759478,
>     -94.110903, -90.00597, -93.257109, -79.932483, -90.201858,
>     -89.100233, -84.625923, -84.567614, -93.912921, -84.612564
>     ), ID = 2318:2352), row.names = c(NA, -35L), class = "data.frame")
>
>
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