As the basis of 3D geographical language, 3D symbol model has
broken through the traditional 1D literal expression and 2D
abstract symbolic expression, promoted the emergence of 3D and
multi-dimensional language and made the traditional 2D static
geographical language develop into the 3D and dynamic scenes
representation. Research on 3D symbol model can make great
significance for further understanding the essence of threedimensional
GIS, normalizing the 3D model, expanding the area
of 3D GIS application, and so on.