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Wuhan 3D digital map system is a high-fidelity 3D geographic information system of metropolis. It spent 3 years to establish the system, and solved creatively some problem in technology and application. The article introduces its contents, construction strategy and achievements.
This paper first discusses the relationship between scale and spatial cognition, and then presents a new a hybrid data structure for integrated modeling of geographic 3D data, combining man-made and natural features above, in and below the earth surface. In this data structure, TIN/TEN approach is used to represent field objects and Boundary Representation approach is used to represent feature object...
We present a method for automatically constructing compact, photo-realistic architectural 3D models. This method uses simple 3D building outlines obtained from existing GIS databases to bootstrap reconstruction and works with both structured and unstructured image datasets. We propose an optimal view-selection algorithm for selecting a small set of views for texture mapping that best describe the...
Tourist navigation systems have used digital maps to provide users with location and route information for a long time. However, without detailed 3D building models, users may miss important turns at some intersections and have problems to find their target buildings. With the advent of Google Earth and Microsoft Virtual Earth, 3D models of buildings in major cities worldwide can be conveniently created...
Three-dimensional reconstruction of geographic zones relief is a process with wide applications in GIS type products, especially those that implement models for simulation of various phenomenons that may affect a specific geographic area (floods, terrain slips etc). By three-dimensional reconstruction of geographic area relief starting from serial sections, we understand regenerating of the area surface...
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