System and method for rendering an overpass object using map and link data

A method implemented on a computing device having at least one processor and at least one computer-readable storage medium, comprising:

• obtaining tile information associated with a region of interest (ROI) from a database;
• extracting, from the tile information, one or more links along a center line of an overpass in the ROI;
• determining at least one intersection of the one or more links;
• performing a topology analysis on the one or more links and the at least one intersection to generate a link chain of the one or more links;
• determining a sequence of fusion based on the link chain;
• constructing a model of the overpass by fusing one or more sub-models according to the sequence of fusion, wherein the one or more sub-models correspond to a link type of the one or more links that have a same group-ID, the one or more sub-models comprise a flat board model and at least one side wall model, and to construct the flat board model and the at least one side wall model corresponding to the one or more links, the method further comprises:
• for each of the one or more links,
• thickening the link in a width direction perpendicular to a main axis of the link to construct the flat board model;
• extending, according to a first preset parameter, the flat board model in a direction perpendicular to a surface of the flat board model;
• and
• constructing the at least one side wall model on at least one side of the flat board model;
• and
• rendering the model of the overpass.

A non-transitory computer readable medium, comprising at least one set of instructions, wherein when executed by at least one processor of a computing device, the at least one set of instructions causes the computing device to perform a method, the method comprising:

• obtaining tile information associated with a region of interest (ROI) from a database;
• extracting, from the tile information, one or more links along a center line of an overpass in the ROI;
• determining at least one intersection of the one or more links;
• performing a topology analysis on the one or more links and the at least one intersection to generate a link chain of the one or more links;
• determining a sequence of fusion based on the link chain;
• constructing a model of the overpass by fusing one or more sub-models according to the sequence of fusion, the one or more sub-models corresponding to a link type of the one or more links that have a same group-ID, the one or more sub-models comprise a flat board model and at least one side wall model, and to construct the flat board model and the at least one side wall model corresponding to the one or more links, the method further comprises:
• for each of the one or more links,
• thickening the link in a width direction perpendicular to a main axis of the link to construct the flat board model;
• extending, according to a first preset parameter, the flat board model in a direction perpendicular to a surface of the flat board model;
• and
• constructing the at least one side wall model on at least one side of the flat board model;
• and
• rendering the model of the overpass.