Introduction to GPS and Electronic Navigation Maps
Global Positioning System (Global Positionning System), referred to as GPS. For self-driving cars, GPS is no longer unattainable equipment. At present, there are many varieties of GPS for sale on the market, some of which are developed by domestic companies using OEM boards and handheld computers, and the price ranges from two to five thousand to five or six thousand. There are also car GPS receiving systems built with DVDs.
The two most important functions of GPS are positioning and navigation. All of the above products use imported OEM boards as GPS receivers. With the receiver, satellite signals can be received and three satellites can be used for positioning. When it comes to navigation, an electronic navigation map is needed.car repairHome
North America and Europe already have door-to-door electronic navigation map versions, and the latest national highway map software is less than $100. We don't have such software yet, and as mentioned earlier, China is building a national highway network, and all regions are investing heavily in urban reconstruction (Beijing alone has 150 roads under construction in 2003). The accuracy of the better electronic maps of national highways and provincial trunk highways can be close to 90%. There are maps of provincial capital cities and major tourist cities. Importantly, these maps can be updated once or twice a year.
In addition to OEM products developed by domestic companies, two well-known American brands, GARMIN and MEGELLAN, can also be seen on the market. I have been using GARMIN products for these years, especially after 2002, they began to sell Chinese-style GPS for cars, the latest STP can be used for voice navigation, and equipped with the latest electronic navigation map (road 1:1000000, city 1 :100000), the part of city navigation is quite accurate. In April 2003, when I visited Chongqing for the first ti
Introduction to GPS and Electronic Navigation Maps
Global Positioning System (Global Positionning System), referred to as GPS. For self-driving cars, GPS is no longer unattainable equipment. At present, there are many varieties of GPS for sale on the market, some of which are developed by domestic companies using OEM boards and handheld computers, and the price ranges from two to five thousand to five or six thousand. There are also car GPS receiving systems built with DVDs.
The two most important functions of GPS are positioning and navigation. All of the above products use imported OEM boards as GPS receivers. With the receiver, satellite signals can be received and three satellites can be used for positioning. When it comes to navigation, an electronic navigation map is needed.car repairHome
North America and Europe already have door-to-door electronic navigation map versions, and the latest national highway map software is less than $100. We don't have such software yet, and as mentioned earlier, China is building a national highway network, and all regions are investing heavily in urban reconstruction (Beijing alone has 150 roads under construction in 2003). The accuracy of the better electronic maps of national highways and provincial trunk highways can be close to 90%. There are maps of provincial capital cities and major tourist cities. Importantly, these maps can be updated once or twice a year.
In addition to OEM products developed by domestic companies, two well-known American brands, GARMIN and MEGELLAN, can also be seen on the market. I have been using GARMIN products for these years, especially after 2002, they began to sell Chinese-style GPS for cars, the latest STP can be used for voice navigation, and equipped with the latest electronic navigation map (road 1:1000000, city 1 :100000), the part of city navigation is quite accurate. In April 2003, when I visited Chongqing for the first time, relying on the voice guidance of STP, it was easy to find the hotel I wanted to go to on the night of wind, high and dark.
Friends who have been in contact with GPS may know that the price of domestic GPS is much higher than that of foreign countries-not only in mainland China, but also in Hong Kong, GPS is also expensive. In addition to tariffs and localization, to a large extent consumers are spending money on the Chinese version of their own electronic navigation maps. In this sense, even if you buy the latest GPS model with relatively cheap price from abroad, the built-in or attached CD-ROM version of the global road map data is old and not exhaustive. If there is no corresponding detailed English version of the Chinese road map , It can only be used as a GPS receiver. Some luxury cars are equipped with GPS navigation systems that cannot be used for this reason.
The third purpose of GPS is surveying and mapping, or more precisely, recording. You can write down the coordinates of those places that you think are important as needed, or you can record the trajectory of the vehicle. Nowadays, the memory of GPS is getting bigger and bigger, and many of them can record more than 2,000 track points, which is enough to record your trajectory in one day. If necessary, you can upload the data to your laptop at any time. Many of the routes introduced in this book are travel trajectories measured on the spot in this way, which is guaranteed to be more accurate than any other map.
The application of GPS is becoming more and more popular. China itself has launched several Beidou satellites for navigation. Home appliance giants like Haier have also extended their antennae to car navigation systems. I believe GPS will become more and more civilians.
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