Three-Dimensional Analysis of Obstacle in the LimitedPlane of Qingyang Airport Clearance

Airport clearance limit and obstacle location serves as a special one to understand and promote the relation between clearance limits and obstacles. In this the papercase of Qingyang airport, the data terrain analysischaracteristics technology and 3D visualization technology are used to get the obstacles data of airport clearance limit. First, the digital elevation,digital orthoimagery, and the horizontal and vertical positions of obstacle point are obtained by using the aerial photogrammetry method.Then the solid model of airport clearance are built. By using terrain analysis method, the location of obstacle are obtained. At last,and obstacle location are discussed. Data processing by computer,processes and technologies to get the data of obstacle location are also descrihed.the Visual GIS module of ERDAS IMAGINE is used to make the Qingyang airport virtual reality environment, by flying simulation, the user can understand the obstacle of airport clearance visually and vividly.