It mainly provides real-time, all-weather and global navigation services by land, sea and air. For example, in Canada, from the perspective of transportation mode: railway: two railways that cross the east and west, that is, connecting the Atlantic Ocean and the Pacific Ocean, form a railway transportation network, and branch lines connect major ports and big cities; The railway operating mileage is more than 50,000 kilometers; The trunk line is managed and operated by National Railway Company (CN) and Pacific Railway Company (CP). Railway transportation mainly undertakes inland bulk cargo transportation, port cargo collection and distribution, and also undertakes foreign trade materials transportation between the United States and Canada. Highway: The highway line from St. John's to Victoria, which is close to the US-Canada border and crosses east and west, is the main line, extending northward to connect all provinces and regions, with the highway line connected with the port as the branch line and the highway line all over the countryside as the meridian, forming a relatively complete highway traffic network. The total mileage of national highways is 900,000 kilometers. Mainly undertake the collection and distribution tasks of ports and railway stations; In addition, automobile transportation occupies a considerable share in the foreign trade transportation of the United States and Canada. Water transport: including ocean transport and inland river transport. Shipping is mainly based on Vancouver port on the west coast and Montreal, Toronto and Halifax ports on the east coast. Inland river transportation mainly refers to the St. Lawrence Canal, which connects Lake Ontario, Lake Erie, Lake Huron, Lake Michigan and Lake Superior, and undertakes the transportation of domestic bulk goods such as grain, iron ore, coal and steel. Cargo throughput of major ports: Vancouver Port: 67.9 million tons, St. John Port: 25.9 million tons, hax Burleigh Port: 22.9 million tons, Soter Port: 22.7 million tons, Quebec Port: 20.3 million tons, Montreal Port: 6.5438+074 million tons, Newfoundland Port: 6.5438+07/kloc. Aviation: there are more than 800 airports, and large airports are located in southern provinces, Toronto, Montreal, Vancouver, Calgary and other important international airports; International routes lead to Asia, Europe, North America and other countries; Domestic routes connect major cities in various provinces.