Table 3 Distance to different nearest neighbors compared to the unperturbed data
Perturbation method | K = 1 | Proportion of original K = 1 | K = 5 | Proportion of original K = 5 | K = 10 | Proportion of original K = 10 | K = 20 | Proportion of original K = 20 |
|---|---|---|---|---|---|---|---|---|
Original data | 14.57 | 1 | 47.67 | 1 | 71.42 | 1 | 104.09 | 1 |
Random perturbation 50 m | 20.52 | 1.41 | 52.19 | 1.09 | 74.28 | 1.04 | 106.41 | 1.02 |
Random perturbation 250 m | 25.07 | 1.72 | 62.03 | 1.3 | 87.37 | 1.22 | 122.83 | 1.18 |
Random perturbation 500 m | 27.2 | 1.87 | 67.12 | 1.41 | 95.37 | 1.34 | 134.57 | 1.29 |
Random weighted perturbation 5 NN | 20.38 | 1.4 | 48.54 | 1.02 | 71.65 | 1 | 104.73 | 1.01 |
Random weighted perturbation 50 NN | 25.02 | 1.72 | 60.06 | 1.26 | 85.36 | 1.2 | 118.45 | 1.14 |
Donut between 5 and 50 m | 20.5 | 1.41 | 52 | 1.09 | 74.45 | 1.04 | 106.31 | 1.02 |
Donut between 50 and 250 m | 24.95 | 1.71 | 61.28 | 1.29 | 86.8 | 1.22 | 122.93 | 1.18 |
Affine shear | 15.2 | 1.04 | 48.6 | 1.02 | 73.03 | 1.02 | 106.97 | 1.03 |
Voronoi masked | 5.59 | 0.38 | 46.38 | 0.97 | 70.77 | 0.99 | 103.29 | 0.99 |
Grid center w/100 m cells | 5.94 | 0.41 | 34.79 | 0.73 | 62.48 | 0.87 | 97.84 | 0.94 |
Grid center w/250 m cells | 1.53 | 0.11 | 12.82 | 0.27 | 29.1 | 0.41 | 62.89 | 0.6 |
Grid line w/100 m cells | 11.39 | 0.78 | 44.58 | 0.94 | 69.86 | 0.98 | 104.75 | 1.01 |
Grid line w/250 m cells | 7.31 | 0.5 | 32.94 | 0.69 | 58.26 | 0.82 | 94.25 | 0.91 |