Systems and methods for generating a road map are provided. The methods include obtaining a navigation route for a navigation terminal and a current location of the navigation terminal. The methods further include obtaining road network data associated with the current location of the navigation terminal based on the navigation route and the current location of the navigation terminal. The road network data includes a plurality of links and a plurality of nodes. Each node is connected to one or more links including at least one type of links. The methods further include determining a level for each node. The methods further include determining one or more target links for the at least one type of links connected to the node based on the level of the node. The methods further include generating a road map based on the target links.