Research On Internet-based 3D Digital Port

The concept of Digital Earth was brought forward first by Al Gore, vice prisident of U. S. A. Digital City is one of information nodes of the construction of Digital Earth and is the base of Digital Earth. The oceans, which cover 71% of the earth surface is the basic part of the system of the life support of the earth. The development of human society will be sure to be more and more depending on the oceans. So Digital Ocean is indispensable to Digital Earth. The Port is the boundary between the city and the ocean,It has the functions and the characters of the city and the ocean. So Digital Port is also indispensable to Digital Earth.Virtual Reality technology which is one of the key technology in Digital Earth, is very important in the research on Digital Ocean and Digital Port. VRML, which can construct a colorful, 3D, dynamic, interactive, virtual world Internet-based, is also a kind of new reaction technology to simulate 3D geographic phenomena in our real world.This paper had a research on function system of 3D digital port Internet-based with technology of VRML combining with technology of Java and WebGIS. For the land of the port,we have constructed the 3D, virtual sight of dalian port which can be displayed in the browser of Internet combining with technology of Internet,CIS and virtual reality.We have a transition from 2D picture to 3D,real scene.we can be observing and roaming dynamically in the scene everywhere, in every viewpoint, with infinitely variable scale, We also can query properties of objects in the scene and have the function of analyzing space. For the water area, We use electronic chart display and information system(ECDIS) to apply the omnidirectional sea digital information for the shipping company.Our research will be helpful to direction in layout of city, development of the resource in our country and promote the construction of dalian 2D port.