Compressing method and compressing equipment for mobile target-position data

Abstract

The method and equipment for compressing the great amount of continuous time and position data of moving target is disclosed. The method includes: a) accepting the current position data of the moving target; b) judging whether the target was in linear motion; c) if yes, judging whether the target is in linear motion after adding current position, and if yes, not updating the position; d) if not in linear motion after adding current position, updating the position and returning to a); and e) if the target is judged to be not in linear motion before, judging whether the target wandered randomly, and not updating the position if so or updating the position if not and setting target linear motion state before returning to a). Where, updating the position includes selecting one length variable position queue, storing the compressed target position to the position queue and inserting the target position in different times into the data base in the insertion rate acceptable for the data base.

Description

technical field [0001] The present invention relates to a method and device for compressing position data of moving objects, more specifically, a method and device for compressing continuous time position data of a large number of moving objects under the condition of ensuring query accuracy. Background technique [0002] Various methods have been proposed for the localization of moving objects. For example, the Global Positioning System (GPS), its positioning accuracy is very high (the GPS satellite constellation transmits two kinds of spread spectrum codes to the ground: C / A code and P code. C / A code is a civilian code, and its positioning accuracy is low, at 100 meters Left and right, the accuracy can be increased to 10 meters by using differential technology. The high-precision P code is a military code, and its positioning accuracy is less than 10 meters, and the speed measurement accuracy is 0.06-0.1m / s). In addition, the current mobile phones can also be located by t...

AI Technical Summary

Problems solved by technology

[0014] In order to solve the above problems, the present invention provides a method and equipment for compressing the continuous position data of a large number of moving objects, which receives the continuous moving positions of a large number of moving objects transmitted from mobile units or positioning equipment, and compresses these positions Compression, insert the compressed location information into the database to solve the problem that the database cannot run under high insertion frequency, and reduce the storage space of continuous locations while ensuring a certain location query accuracy

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