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Table 1 Euclidean distance between the original spatial center of the distribution, as depicted by both median and mean of the points

From: Measuring the impact of spatial perturbations on the relationship between data privacy and validity of descriptive statistics

Perturbation method

Change in median

Change in mean

Original data

0

0

Random perturbation 50 m

0.32

0.11

Random perturbation 250 m

0.79

0.82

Random perturbation 500 m

18.54

0.63

Random weighted perturbation 5 NN

1.76

0.35

Random weighted perturbation 50 NN

3.69

1.09

Donut between 5 and 50 m

3.76

0.28

Donut between 50 and 250 m

2.65

5.58

Affine shear

123.49

0.38

Voronoi masked

0.84

0.18

Grid center w/100 m cells

42.09

1.6

Grid center w/250 m cells

32.91

4.29

Grid line w/100 m cells

7.91

0.6

Grid line w/250 m cells

6.68

1.29