1. American Tianbao Company successively acquired Zeiss in Germany, Jebsen in Sweden and Nikon in Japan, and formed a surveying and mapping instrument group based on GPS satellite measurement technology and total station. The annual sales of surveying and mapping instruments is about 600 million dollars, equivalent to 5 billion yuan.
2. Leica Company of Switzerland merged with Kern Factory of Switzerland to form a comprehensive surveying and mapping instrument company that produces and sells aerial photography, GPS, total station and laser scanning instruments. The annual sales are about 500 million US dollars, equivalent to 4 billion yuan.
3. Topcon company of Japan recently merged with Soja company of Japan, mainly focusing on GPS and total station, supplemented by conventional surveying and mapping instruments, with sales of about 400 million US dollars, equivalent to RMB 3 billion.