Traffic geographical information system generating method

The invention relates to a traffic geographic information system generation method which belongs to the field of intelligent transportation technology, and the invention comprises the following steps: (1) digital map demixing; (2) map layer data organizing; (3) two-way road drawing; (4) traffic information layer drawing: dividing the drawing of a digital geographic information system to the class of point layer, line layer and block layer according to geographic information characteristics of ground objects on basis of synthetically considering geographic GIS characteristics; meanwhile, establishing a data structure corresponding to the map layer for each map layer and including the geographic information of the map layer and the shared property information of the ground objects on the map layer, and the drawing of the road data adopting two-way physical data; , designing a geographic information display interface; at last selecting the map layer displayed under the resolution according to current display res