Outdoor blind guiding spatial data organization method based on channels and function units

The invention discloses an outdoor blind guiding spatial data organization method based on channels and function units. Urban space units are divided into route units and universal units, and specifically comprise complex units and simple units, and the complex units comprise complex units and/or simple units and/or route units; besides obstacles and attachments, the functions of meeting the demands of the blind are given to other universal units, and the other universal units are connected with the road units through entrances; semantic and expansion frames are used for describing the urban space units, and the public can provide dynamic blind guiding information in a VGI mode; the road units are associated with function unit entrances, and topological information of the urban space units is stored. The method is more suitable for the demands of the blind for spatial information when the blind go outdoors, global path planning and partial routing analysis are facilitated when the blind go outdoors, the risk factors of various obstacles on the roads for walking of the blind are given, and important bases are provided for low-risk routing planning for the blind going out.