source:Industry News release time:2022-11-09 Hits: Popular:realtime gps tracker online
The collection process of GPS data will be affected by many external factors, which will lead to errors in the quality of GPS data. The causes of these errors are mostly unavoidable, so the impact on mobile GPS data is unavoidable. Therefore, mobile GPS data cannot be directly used to estimate and forecast traffic flow. Otherwise, if the data with large error is directly used to estimate the average speed of traffic flow, the accuracy of estimation will be greatly affected due to error transmission. In order to reduce the adverse effects of data errors, the original data should be processed first.
The original data can be divided into two types according to the degree of impact: one is data with small deviation, and the other is data with errors. Different measures should be taken to preprocess different data. Wrong data should be eliminated; The data with slight deviation should be corrected to ensure that the data can be projected onto a reasonable road network. Error data is usually caused by serious interference of GPS satellite signals during transmission, such as sudden changes in relatively dense large buildings, dense forest trees or electromagnetic waves, which make the positioning data seriously deviate from the historical track. Because this kind of data can hardly reflect the driving situation of the vehicle, it can not represent the correct position of the vehicle and needs to be deleted from the original data. For such errors, the threshold test method is usually used to judge. This method assumes that the reasonable value of vehicle speed is a fixed range. When a certain speed exceeds this reasonable range, it means that the data is incorrect and needs to be eliminated. The deviation data is usually caused by GPS positioning error, which often happens, and such data should be considered as normal data. This kind of data also needs to be modified, and the usual method is the algorithm of electronic map matching [4,5]. This method projects the mobile GPS data on the map, and makes a vertical line to the matching road section according to the projected data points, so the intersection point with the matching road section is the matching position of the data point
Read recommendations:
pet gps tracker cat distributors
Beidou 4G wiring GPS positioner installation precautions.realtime gps tracker online Processing
Last article:GPS navigation signal
Next article:GPS system verification
Related Information
Dog gps tracker price
2023-04-23cantrack g05
2023-04-234G GPS Tracker for vehicles supplier
2023-04-23mileage tracking webfleet solutions
2023-03-16fleetmanagement webfleet solutions
2023-03-16Pet GPS Tracker wholesale
2023-03-16Magnetic gps tracker sales
2023-04-234G LTE gps tracker
2023-03-16gps tracker with magnet Vendor
2023-03-16Hidden GPS Trackers supplier
2023-04-23G900LS-4G Car GPS Tracker
2023-10-06GF20-Mini Magnet GPS Tracker
2022-06-21G500L -4G OBD GPS Tracker
2022-09-06G900LS 8 Lines-4G Car GPS Tracker
2025-03-31G02M Pet Tracker
2022-06-19GPS coordinate
2022-11-23Introduction to GPS Positioning Principles.gps tracker no monthly fee Processing
2023-04-20Does gps tracker cost traffic?
2022-09-15GPS smart bus stop sign
2022-09-05Shielding of GPS Satellite Signal
2022-12-28Bring a GPS tracker and never be afraid of losing it again!
2022-09-15Precautions before installing GPS intelligent positioning terminal.car gps tracker manufacturer
2023-09-15The GPS system consists of three parts
2022-12-06Beidou Navigation system-GPS system composition and working principle
2022-10-20GPS alarm.4G GPS Tracker Manufacturing
2023-07-04GPS reset did not have a substantial impact on car GPS locators
2023-09-04GPS Logistics Tracking and Monitoring Application Solution
2023-02-02The historical development of GPS in the 20th century
2023-02-10Bluetooth GPS related issues.plug & play Obd gps tracker Processing
2023-08-04Talk about the advantage of the use of pet smart positioner.realtime gps tracker online manufacture
2023-03-10