BOOKS OF RtfiDIfGS - PAHO/WHO

- 275 -
William J. Abrnarthy and John C. Herhshy
It is uieful to explore tile ¡inplications of thc variouu criteria for a given number of he:i(1h.
care. centeor and then to examine the ellect of increa.sing the number of centers. Thle IfTawt
of alternative criteria is the most obvious when one center is i>ositioned to satidfy the ent ire
region'l; requirement. Figure 2 liows tlhe three differeltt locationa for onlul center that :ure
T.,BLI:, I1
l.,ATrlON. I.t)uXU, .xi)> POPUL.ATION uO C';:.SU 1B.ucLrs IY ¿VT.\lAT'M
No. Coordinates Radius
-1U.0 1 1.2 1.0
2 t - I Iu.0o 12.5 1.0
: -S.-8.7 1I2.(l i.0
¡ -'. 4',j 1 1O.O 0.7
, -11.5 10.4 1.0
Ei -12.0 14.8 2.0
7 -7.5 14.0 2.0
t -6_. 3 i 10.4 2.0
9 -10.2 7.3 1.8
10 -13.7 1 9.1 2.0
1 -1.2 11.5 2.2
12 -3.2 j 3 5.0
13 -12.5 4.2 1.8
14 -12.0 -0.3 4.U
15 4. ij t9.0 4.0
i -8.3 -5.2 3.5
17 i 2.7 -2.0 1.7
I18 3.0 1.2 i
2.0
19 5. -3.7 2.0
20 1 0. -4.8 2.0
21 It.4 11.3 2.5
22 ' 20.3 5.7 3.5
!3
2>4 j
2 11.5
10.9
3.
1--5.8
1 5.5
! 4.0
25 j l.O -0.85 3.0
21 ! 2.0 0.3 1.8
27 24.8 --6.3 1.5
't8 ' 18.0 -6.0 2.0
29 21.8 - -3.3 0.8
30 k2.4 -1 1.0
31 22.8 -3.7 1.0
32 20.6 -4.3 1.0
StratunI 1 Straum 2 Suatum Stratum Slrau
1O(Xi . i. 4;5 i 1;)
634 1617 IX) ;t;
j w33
2 ;O 55
1 7
175
! ¡? 14;x;
¡0 llt ¡iuu
i633 16i i (X}) .5;.
1100 - ~0 130 454
700 400 : 200 : »)
tax,) 200 120 150
ti}5 '.H1O 120 5lZ)
700 T Ld0 1'25 ( ti)
850 i J0 12,5 700
i 512 1to o 338 j 5)
44i 2i00 37 350
34i2 200 1 38 250
5)00
iO0
750
112
112
112
113
113
113
2'25
250
167
167
166
575
375
375
450
350
700
350
450
450
450
lU0
534
533
533
4;0
275 S
275
250
137
288
28 8
787
438
537
475
850
600O
60O0
6OO
i
.00
500
lictated by eriteria 1, 2, aid 3 with repeet to the three cities. The three dots indicate center
ioatims; assoe~ited triangles identify respective criteria. The precise locations with resleet
to the coordinates in Fig. I are given ii Table II. I)ata offeriig a comparison of each
location with respect to all criteria, including criterion 4, are pIrovideti i¡u Table IV.
Tlle tiree criteria yield eritirely different locations. Vhen criterion I (maximize utiliza-
140
150
150
150
150
350
217
216
216