Max. trips per user | 5 |
---|---|

Privacy budget | 1.00 |

User privacy | True |

Budget split | Evenly distributed |

Evaluation dev. mode | False |

Excluded analyses | None |

Noise has been added to provide differential privacy. The 95%-confidence interval gives an intuition about the reliability of the noisy results.

This report provides differential privacy guarantees.
The concept of differential privacy is that the output of an algorithm remains
nearly unchanged if the records of one individual are removed or added.
In this way, differential privacy limits the impact of a single individual on
the analysis outcome, preventing the reconstruction of an individual's data.
Broadly speaking, this is achieved by adding calibrated noise to the output and the amount of noise is defined by the *privacy_budget*.
Depending on the setting of *user_privacy*, noise is either calibrated to only protect single trips (item-level privacy) or to protect the privacy of users (user-level privacy).
The privacy budget is split between all analyses.
The cofiguration table provides information on the used *privacy_budget*, the *budget_split* and *user_privacy*.
For each analysis, information is provided on the amount of utilized privacy budget.

The *Laplace mechanism* is used for counts and the *Exponential mechanism* for the five number summaries.
Details on the notion of differential privacy and the used mechanisms are provided in the documentation.

privacy budget: 0.0667

estimate | 95% CI: +/- | |
---|---|---|

Number of records | 2,595,459 | 1,797.3 |

Number of distinct trips | 1,297,951 | 1,797.1 |

Number of complete trips (start and and point) | 1,297,508 | 1,797.4 |

Number of incomplete trips (single point) | 443 | 898.7 |

Number of distinct users | 378,760 | 179.7 |

Number of distinct locations (lat & lon combination) | 204,413 | 1,797.4 |

privacy budget: 0.0667

estimate | 95% CI: +/- | |
---|---|---|

User ID (uid) | 0 | 2,246.8 |

Trip ID (tid) | 1,188 | 2,246.8 |

Timestamp (datetime) | 0 | 2,246.8 |

Latitude (lat) | 467 | 2,246.8 |

Longitude (lng) | 364 | 2,246.8 |

privacy budget: 0.0667

95% CI: +/- 0.1 %

Timestamps have been aggregated by date.

Min. | 2018-04-18 |
---|---|

Max. | 2018-04-20 |

privacy budget: 0.0667

95% CI: +/- 0.0 %

privacy budget: 0.0667

95% CI: +/- 0.0 %

privacy budget: 0.0667

95% CI: +/- 449.4 visit(s)

0 (0.0%) points are outside the given tessellation (95% confidence interval ± 449).

Mean | 6,728 |
---|---|

Min. | 0 |

25% | 2,645 |

Median | 5,130 |

75% | 9,453 |

Max. | 43,271 |

privacy budget: 0.0667

95% CI: +/- 224.7 visit(s)

The average of each tile over all time windows equals 1 (100% of average traffic). A value of < 1 (> 1) means that a tile is visited less (more) frequently in this time window than it is on average.

User configuration of timewindows: ['2 - 6', '6 - 10', '10 - 14', '14 - 18', '18 - 22']

privacy budget: 0.0667

95% CI: +/-224.7 flow(s)

User configuration: display max. top 300 OD connections on map

Mean | 82 |
---|---|

Min. | 1 |

25% | 24 |

Median | 56 |

75% | 111 |

Max. | 3,922 |

privacy budget: 0.0667

95% CI: +/-: 0.1 %

User configuration for histogram chart:

maximum value: 90

bin size: 5

Min. | 5.00 |
---|---|

25% | 17.00 |

Median | 28.00 |

75% | 44.00 |

Max. | 225.00 |

privacy budget: 0.0667

95% CI: +/- 0.1 %

User configuration for histogram chart:

maximum value: 30

bin size: 3

Min. | 0.00 |
---|---|

25% | 0.95 |

Median | 3.34 |

75% | 6.68 |

Max. | 26.74 |

privacy budget: 0.0667

95% CI: +/- 0.1 %

Trips per user are limited according to the configured maximum of trips per user: 5

Min. | 2 |
---|---|

25% | 2 |

Median | 4 |

75% | 5 |

Max. | 5 |

privacy budget: 0.0667

95% CI: +/- 0.1 %

User configuration for histogram chart:

maximum value: None

bin size: None

Min. | 0 days 00:00:00 |
---|---|

25% | 0 days 00:25:00 |

Median | 0 days 01:35:00 |

75% | 0 days 04:20:00 |

Max. | 0 days 15:45:00 |

privacy budget: 0.0667

95% CI: +/- 0.1 %

User configuration for histogram chart:

maximum value: 18

bin size: 1.5

Min. | 0.02 |
---|---|

25% | 1.39 |

Median | 2.60 |

75% | 4.49 |

Max. | 14.44 |

privacy budget: 0.0667

95% CI: +/- 0.1 %

User configuration for histogram chart:

maximum value: None

bin size: None

Min. | 1 |
---|---|

25% | 2 |

Median | 3 |

75% | 3 |

Max. | 8 |

privacy budget: 0.0667

95% CI: +/- 0.1 %