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:
Bluetooth GPS.obd2 gps tracker verizon sales
Bracelet GPS positioner and anti -lost device!car gps tracker maker
Last article锛?GPS navigation signal
Next article锛?GPS system verification
Related Information
4G GPS Tracker for vehicles Solution
2023-04-23gps tracker for trailer
2023-04-23real-time gps tracking
2023-03-164G GPS Tracker for vehicles distributors
2023-04-23Pet GPS Tracker Factory
2023-03-16fleet gps tracking
2023-04-11Car gps tracking wholesale
2023-04-23personal gps tracker distributors
2023-04-11fleet gps tracking
2023-04-23fleetmanagement webfleet solutions
2023-03-16P60L Personal gps tracker
2022-06-21G500L -4G OBD GPS Tracker
2022-09-06G06L
2022-06-21GF20-Mini Magnet GPS Tracker
2022-06-21G09L -6 inch Tail light tracker
2022-06-20Whether GPS positioning is GPS navigation.obd-II port gps tracker manufacture
2023-05-09GPS data interpretation.fleet gps tracking Processing
2023-06-05Type of GPS data format and extraction of positioning information
2022-11-24The development of GPS system
2022-10-12Application Prospect of Differential GPS
2022-11-07GPS positioning principle
2022-10-14Application examples of GPS technology in navigators.fleet gps tracking supplier
2023-07-24Design of GPS Vehicle Satellite Positioning Simulation System
2022-12-06GPS search for stars.obd-II port gps tracker Manufacturing
2023-08-10What does the gps fee for buying a car mean?
2022-08-12Main indicators and characteristics of GPS monitoring and scheduling system.obd-II port gps tracker
2023-08-11How does GPS develop
2022-12-13Global GPS list and parameters
2022-12-01Bluetooth GPS Technology Features.gps tracker f眉r auto webfleet solutions
2023-08-04GPS positioner type installed on the mortgage vehicle.fleet solution webfleet solutions
2023-03-22