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±
Reconstruction of Dr. John Snow's Dot Map Of Deaths From Cholera Outbreak In Soho, London 1854
Using Proportional Symbol To high light "Hot Spot" of the disease and challenging the problem of spatial aggregation
in Figure1 And 2 below to illustrate the Modifiable Areal Unit Problem (MAUP)
Cho le rais adis e as e cau s e dby drin kin g co n tamin ate dw ate rby "Vibrio cho le rate "bacte riu m.
“By mappin g the dis e as e ,n o ticin g aclu s te rce n te re daro u n dthe Bro adStre e tw ate rpu mp
an dthe n re mo vin g the pu mphan dle ,Sn o w de fe ate dthe cho le rae pide micin thatare a”
(Shaw,187).His s tu dy als o pro ve dthatthe dis e as e w as n o ttran s mitte dthro u g hairbu tby the
po llu te ddrin kin g w ate r.Fig u re o n e an dtw o rais e the atte n tio n o fGISan alys ts to be e xtre me ly
care fu lo n the s e le ctio n o fthe u n ito fag g re g atio n ,be cau s e diffe re n tu n itcan de rive diffe re n to r
e rro n e o u s re s u lts .
MapCo mpile dBy:Pize me Tchara,Fe bru ary 12,2018
Figure1
Figure2
Cho le raDe aths
!( 1
!( 5
!( 10
Qa Pu mpLo catio n ! 1Do t=1De ath
0.1Mile s

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Dr. John Snow's Dot Map

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