Exploring The Key Technologies For The Development Of 3D GIS Based On Skyline

The 3D GIS is an important part of information technology on behalf of the research and development in GIS direction, which has better expression of visualization of spatial information and multi-dimensional spatial analysis compared with 2D GIS.Skyline puts forward a new solution of 3D GIS which provides software tools for enabling 3D geo-spatial applications, streaming of massive data sets, and opens standards and a full API to easily add interactive 3D capability to enterprise application. However, many problems such as the burden of massive 3D data transmission, less optimization of 3D model data, the weakness of decision support of 3D GIS have become more and more obvious.This paper summarizes the current research progress both national and international wide in 3D GIS research field as well as the development of 3D GIS by Skyline. Based on the above background, the key technologies of the development of 3D GIS are studied which includes the optimization of 3D terrain database and models, method of loading and displaying data and collaboration technology.The complex and massive 3D terrain database and models are difficult to transfer, load and display. In this paper, the method which optimizes publication of 3D terrain data and simplifies the structure of 3D model is discussed on the basis of experimental studies.The function of layer rendering is designed and developed based on the summary of the use of the method of rendering layers in Skyline in order to resolve the weakness of functional design of layer rendering.At present, in-depth research of applying collaboration technology in 3D GIS has not carried out, which is a major feature of Skyline. In the paper the application mode of integrating collaboration and 3D GIS to provide decision support is put forward based on the analysis of development and research of collaboration technology.As a result, the application of 3D GIS for Chongming Island ecological construction is established based on the key technologies mentioned in the paper, which includes three function modules for searching and location, layers rendering and collaboration to provide visualization of geographic information management and layers rendering, and aid to carry out collaboration in different place based on sharing the 3D scene.