terrain feature
2.This paper put forward a kind of Grid-Vertex-Triangle index mechanism based on space object to cope with enormous quntity of terrain points. According to the theory of constrained delaunay triangulation,the DTM with terrain feature was constructed by using the incremental insertion algorithm and its speed and precision were analized by many applications.
3.Of all the Lunar Rover key technologies, the main task of the stereo vision system is to achieve onboard perception and fusion of the complex lunar terrain, by capturing images, matching feature points, producing depth map, recognizing obstacles and reconstructing 3D scene, in order to navigate and avoid obstacle automatically in unknown environment.
5.The research emphases of the paper include the establishment of terrain model and the realization of detail of surface. During the establishment of terrain model, the theory of fractal and the characteristics of IVS, fractal Brown motion (fBm) are discussed and compared, and prove the model is adapt to the feature of the physiognomy. The fractal model of terrain is established based on the theory of IVS.
7.Meanwhile, require characteristic of data by database according to GIS to space, one nested tree type that Terrain Object Set (TOS) structure carry on method of encapsulation to space datum was put forward and utilized specialized some demand according to land in the paper. And, some expansion nature designs and realize the method that the surface feature is collected.
8.Select material piece keyword: Natural element + manual goods Generally speaking, a kind of household that thes southern part of the country amorous feelings is to cover distinguishing feature of southeast Asia terrain decorates amorous feelings, draw materials from the woof between heaven and earth: Be like gold, wood, water, fire, earth, air, do not think must will indoor hard outfit wantonly repair ability achieves a goal.
