Electronic maps are important basic information that provides visual display and operation interfaces for vehicle GPS positioning/Beidou satellite positioning systems. The main goal of establishing a vehicle monitoring electronic map system is to provide a spatial data framework through which data retrieval, querying, and analysis can be achieved. The display and analysis methods of information in the vehicle monitoring electronic map system depend on the performance of the electronic map. Therefore, having a wide coverage and high-precision electronic map system is an important prerequisite for establishing a vehicle monitoring system.

　　The information integrates maps from more than ten mainstream commercial map providers in China, and automatically upgrades them online for users to choose from. Users do not need to purchase and load electronic maps on local servers, which not only allows users to use electronic maps economically, but also eliminates the hassle of map data maintenance and upgrading.

　　Common map operations include:

　　1. Set default map and map center point:

　　When the customer exits from any map while using the GPS positioning system, this map is set as the default map

　　2. Zoom in and out on the map

　　After clicking on the map with the mouse, you can zoom in and out of the map using the mouse scroll button, or use the map operation button in the upper left corner of the map to operate

　　3. Switch Maps

　　Click the map button on the menu bar to freely choose between different maps

　　4. Map Roaming

　　You can drag and display the map with the mouse, automatically displaying the roaming trajectory during the roaming process, and visually displaying the speed and direction of the roaming. The roaming process is fast and flickerless.

　　5. Geographic distance measurement

　　On the map, the physical length represented by the drawn line can be measured by clicking on it with the mouse.

　　On a map, you can measure the distance represented by any polyline and the circumference and area enclosed by any polygon.

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