With the rise of the Internet, various Internet applications have also been developed by research. As the current GPS navigation system with many, to use its navigation system with it all the more easy, but the only fly in the ointment is that these systems can only be used on the outside of the roads, if in a specific local area, such as schools, large playground, and so on. Probably because of private land or other reasons, usually map library will not have this information, so we really make use of a simple data types and network infrastructure to facilitate the sharing of these information system services. Due to the implementation of the path decision in this area have encountered some minor problems, and the well-known site UrMap path decision function has not done a good job, so this paper will focus in this regard.