source:truck tracking webfleet solutions release time:2023-08-12 Hits: Popular:realtime gps tracker online

There are two types of coordinate representations: 2D and 3D. When GPS can receive signals from four or more satellites, it can calculate the local 3D coordinates: longitude, latitude, and altitude. If it can only receive signals from three satellites, it can only calculate the 2D coordinates: accuracy and latitude. At this time, it may also display altitude data, but this data is invalid. Most GPS systems can not only display coordinates in Lat/Long format, but also use coordinate systems such as UTM (Universal Transverse Mercator) to display coordinates. However, we generally use the LAT/LONG system, which is mainly determined by the coordinate system of the map you are using. When Selective Availability is turned on, the horizontal accuracy of GPS is between 100-50 meters, depending on the amount and strength of satellite signals received. If you have arrived according to GPS instructions, take a look around and you should find your target within an area about the size of a football field.
When SA is turned off, the accuracy can reach about 15 meters. The high accuracy is worse due to the system structure. The display method of longitude and latitude can generally be chosen according to one's own preferences, including "hddd. dddd", "hddd * mm. mm", "hddd * mm" ss. s "(where" * "represents" degree ", the same below). The length of the Earth's meridian is 39940.67 kilometers, with a latitude change of 110.94 kilometers, a minute of 1.849 kilometers, and a second of 30.8 meters. The equatorial circle is 40075.36 kilometers, and the latitude in Beijing is around 40 degrees north latitude, with a latitude circle length of 40075 * sin (90-40), At one point, the longitude of this place was 276 kilometers, with one minute being 1.42 kilometers and one second being 23.69 meters. You can choose a certain display method and change the numbers to correspond to how many meters the ground has moved. This way, you can establish an approximate correspondence between the longitude and latitude and the actual mileage. Most GPS systems have the function of calculating the distance between two points, which can provide accurate distance between two coordinates. There are two ways to display height: English and metric. Go to the GPS SETUP page and set it to metric, so that other displays such as speed and distance will also be in metric.
Read recommendations:
3 Years Disposable Asset GPS Tracker
Compared with wired GPS positioner and wireless GPS positioner.gps tracker for trailer manufacturer
Last article:GPS landmarks and routes.GPS Tracker for vehicles wholesale
Next article:GPS navigation software.Hidden GPS Trackers Factory
Related Information
Best hidden gps trackers
2023-04-114G GPS Tracker for vehicles Factory
2023-04-23trailer gps tracker Factory
2023-04-23gps tracker online
2023-04-11Pet GPS Tracker supplier
2023-03-16Hidden GPS Trackers
2023-04-11vehicle gps tracker Factory
2023-04-23fleetmanagement webfleet solutions
2023-03-164G GPS Tracker for vehicles Vendor
2023-04-23personal gps tracker distributors
2023-03-16TK100B- Accurate Pro version GT06/TK100
2023-10-063000mAh Magnet Asset GPS Tracker
2025-03-31G183 serials -JOBD GPS Tracker
2022-09-06NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21G900LS 8 Lines-4G Car GPS Tracker
2025-03-31What is the development of the car GPS positioner market development
2023-03-07What to choose for new car GPS
2022-08-09The GPS navigation function is diverse. Let's take a closer look at the GPS navigation voice prompt
2023-04-14GPS performance index
2023-02-08Introduction to GPS application scope
2022-12-13GPS system principle
2023-02-09Introduce the different types of the positioner
2023-03-07What should be considered in addition to the positioning and navigation performance when choosing GP
2022-10-28GPS positioning technology
2022-11-24The editor tells everyone where car GPS is usually installed.obd-II port gps tracker sales
2023-06-16Portable Wireless GPS Tracker
2022-09-20Signal from GPS receiver
2022-11-08Schematic diagram of GPS satellite navigation system
2022-12-29The development of GPS system
2022-10-12Why does the GPS module take a long time to obtain positioning data after being turned on?mini gps t
2023-07-11