1275 
A NAVIGATION DATA MODEL BASED ON THE SYNCRETIC MULTI-LAYER 
ROADWAY NETWORK 
Baojun Zhao, Xiaohang Cao, Jinhui, Xu 
R&D dept, of Navinfo Co., Ltd. Beijing, 100083. P.R.China. zhaobaojun@163.com 
Commission I, SS-4 
KEY WORDS: Roadway Network Model, Syncretic Data Model 
ABSTRACT: 
The data model for navigable electronic map need to created based on an syncretic model of multi-layer roadway network, as the 
evolution of the navigation information technology, the rapid extension of the navigation application, and the development of the 
Intelligent traffic system (ITS) and Advanced Driver Assistance Systems (ADAS). The basic ideas about the traffic roadway network 
and the syncretic data model based on the multi road network are presented in this paper. The principles for modeling the syncretic 
data are introduced. The validity and feasibility of this data model are also discussed. 
1 INTRODUCTION 
With the evolution of the navigation information technology, 
the consumed electronic product, the internet technology and 
the communication technology, the navigation mode extend 
quickly from the simple car navigation to the more complex 
navigation application such as pedestrian navigation and multi- 
mode navigation. The multi-mode navigation application is 
designed for the traveler with a rounded navigation function, 
which is integrated with all kinds of navigation related 
information, and providing more perfect plans and whole 
transport transfer information. The pedestrian navigation and 
multi-mode navigation need the navigation electronic map to 
provide more detailed, more integrated and more accurate road 
feature data. The current in-vehicle navigation electronic map 
data model can’t meet the need of the pedestrian navigation and 
multi-mode navigation. So, it is need to develop a more perfect 
navigation data model for more complex navigation application. 
In this paper, a navigation data model based on the syncretic 
multi-layer roadway network is presented to meet the need of 
the pedestrian navigation and multi-mode navigation. 
2 BASIC CONCEPTION 
2.1 Travel manner 
In the practical application, there are only two kinds of travel 
manner which are mostly be used. One is by walking; the other 
one is by vehicle. Usually, people will travels by walking 
cooperated by vehicle. 
The vehicle by which people will travels also can be classified 
into two categories: public vehicle and private vehicle. 
Thereinto, public vehicle includes bus, subway, railway, ship, 
airplane, and so on. Private vehicle includes motor vehicle and 
non-motor vehicle. 
2.2 Traffic Network 
2.2.1 Overview of the traffic network 
The actual traffic network covers the sky, the ground, and the 
aquatic. It is a coadjacent heterogeneous network as shows in 
figure 1. 
Includes 
Connecting 
Includes 
Connecting 
Includes 
Connecting 
Belong to 
Connected 
Figure 1: Traffic network model in NIAM