Table A1: Minimum sampling points required for detection of circular hot spots using a systematic sampling pattern at 95% confidence level
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| Diameter of the circular hot spot that can be detected with 95% confidence (m) | Square grid size G (m) | Area of site (ha)* | Area of site (m2) | Minimum number of sampling points recommended (N) |
|---|---|---|---|---|
|
11.8 |
10.0 |
0.05 |
500 |
5 |
|
15.2 |
12.9 |
0.1 |
1000 |
6 |
|
19.9 |
16.9 |
0.2 |
2000 |
7 |
|
21.5 |
18.2 |
0.3 |
3000 |
9 |
|
22.5 |
19.1 |
0.4 |
4000 |
11 |
|
23.1 |
19.6 |
0.5 |
5000 |
13 |
|
23.6 |
20.0 |
0.6 |
6000 |
15 |
|
23.9 |
20.3 |
0.7 |
7000 |
17 |
|
24.2 |
20.5 |
0.8 |
8000 |
19 |
|
25.0 |
21.2 |
0.9 |
9000 |
20 |
|
25.7 |
21.8 |
1 |
10,000 |
21 |
|
28.9 |
24.5 |
1.5 |
15,000 |
25 |
|
30.5 |
25.8 |
2 |
20,000 |
30 |
|
31.5 |
26.7 |
2.5 |
25,000 |
35 |
|
32.4 |
27.5 |
3 |
30,000 |
40 |
|
32.9 |
27.9 |
3.5 |
35,000 |
45 |
|
33.4 |
28.3 |
4 |
40,000 |
50 |
|
34.6 |
29.3 |
4.5 |
45,000 |
52 |
|
35.6 |
30.2 |
5 |
50,000 |
55 |
* 1 ha = 10,000 m2
