MAP BASED ON EMPIRICAL EVIDENCE--REGION INTERIOR IS SHADED WHITE; LIGHTEST COLOR REPRESENTS FEWEST ACCEPTORS.  DARKER COLORS REPRESENT MORE ACCEPTORS
 
aa a A B C D E F G H I J K L M N
 a
a a a a a a a a a a a a a a a
1
a a a a a a a a
2
a a
a
a
a a
3
a
1
a
4
a
5
1
a
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a a
2
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6
a
2
7
a
1
3
a
8
a
1
1
1
a
9
a a
1
a
10
a a
1
a a a a a a a a
11
a a a a a a a a a a
12
a a a a a a a a a a

Figure 1. Distribution of original acceptors of an innovation--after 1 year--based on empirical evidence. After Hagerstrand, p. 380.
 
 

aa a A B C D E F G H I J K L M N
a
a a a a a a a a a a a a a a a
1
a a a a a a a a
2
1
1
a a
3
a
1
1
1
a
4
a
6
1
1
1
a
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a a
2
1
a
6
a
5
7
a
1
1
1
3
a
8
a
1
1
2
2
a
9
a a
1
1
a
10
a a
1
a a a a a a a a
11
a a a a a a a a a a
12
a a a a a a a a aa a

Figure 2. Actual distribution of acceptors after two years.

Simulated Diffusion pattern after 2 years, using the actual initial distribution and random number set 1.
 

aa a A B C D E F G H I J K L M N
 a
a a a a a a a a a a a a a a a
1
a a a a a 1 a a a
2
a a
2
1
a a
3
a
2
a
4
a 1
6
2
1
a
5
a a
3
1 1
6
a 1
3
1
7
a
2
7
a
8
a
2
3
1
a
9
a a
1
a
10
a 1
1
a a a a a a a a
11
a a a a a a a a a a
12
a a a a a a a a a a
Figure 3.  First simulation of pattern after two years.
 

ANIMATED .GIF OF ACTUAL AND SIMULATED