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Quality evaluation method based on track data

A trajectory data and quality evaluation technology, applied in the information field, to achieve low cost and simple evaluation

Active Publication Date: 2014-03-26
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will take a lot of human effort to preprocess and visualize the data, and finding flaws in the data requires human experience and luck

Method used

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  • Quality evaluation method based on track data
  • Quality evaluation method based on track data
  • Quality evaluation method based on track data

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 As shown, the embodiment of the present invention provides a quality assessment method based on trajectory data, including steps:

[0018] S1. Express the trajectory data as a set of tuples in four dimensions to obtain a map;

[0019] S2. Group the trajectory data according to entities, sort the groups by using the time dimension, and convert each trajectory of the trajectory data into a set of ordered line segments;

[0020] S3. Divide the map into grids of equal size, and project the trajectory data into the grids;

[0021] S4. Calculate the entropy of the grid, and calculate the average entropy and the weighted average entropy of all the grids.

[0022] The embodiments of the present invention use entropy to effectively evaluate the quality of trajectory data, and perform data quality assessment on trajec...

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Abstract

The invention discloses a quality evaluation method based on track data. The quality evaluation method comprises the steps that S1. the track data are expressed as a tuple combination of four dimensions, and a map is obtained; S2. the track data are grouped according to an entity, a time dimension is used for sorting on groups, and each track of the track data is converted into a collection of orderly segments; S3. the map is divided into cells with the same size, and the track data are projected into the cells; and S4. the entropy of the cells is computed, and the average entropy and the weighted average entropy of all the cells are computed. According to the method, the entropy is used for effectively evaluate track data quality, data quality comparing of a plurality of track data is achieved, the feasibility for data analysis is analyzed, and data quality evaluation is easy, effective and low in cost.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a quality evaluation method based on trajectory data. Background technique [0002] Humans, animals, and all movable devices can describe their behavior trajectories according to time, and the development of technology can use different devices to describe the moving trajectories of humans or movable objects. For example, the installation of GPS equipment in taxis can record the movement trajectory of the car; the communication (Check-In) of the mobile phone user's mobile phone to the communication base station can reflect the user's movement trajectory. [0003] The analysis of trajectory data will have important and key significance in geographic information science, human dynamic behavior, animal behavior, business decision-making, etc. However, due to the limitations of equipment capabilities, or errors in the transmission process, or problems in the data entry process,...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 黄俊张帆李晔须成忠王丽
Owner SHENZHEN INST OF ADVANCED TECH
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