1. Mei, X.: GIS: urban planning in the information age. Heilongjiang Transp. Sci. Technol. (2007)
2. Xue, H., Shang, M.: Rational analysis of GIS in urban planning and design. Urban surveying (2004)
3. Xu, W., Zhao, W., et al.: Application of RS and GIS in the planning of agricultural green space system. People Yangtze River (2008)
4. Xie, B., Li, L., et al.: Research on 3D graphic planning system of GIS and VR technology. Microcomputer information (2004)
5. Xie, Z.: A summary of three dimensional GIS aided agricultural planning. Appl. Sci. (2008)