From the point view of flight course design of aerial photogrammetry for route selection,this paper deeply discussed how to identify the height of mean height plane,how to ensure the side overlap of single flight course to avoid the absolute aerial photographic gap,how to judge if need complementary photogrammetry after changing the flight course,etc.

By analyzing the features of knowledge structure in railway location, this paper sets up a layer model.

As an important part of virtual environment railway location design system, railway location engineering database management system is base of storing information and tool of dealing with information.

To develop an inference engine that can be reused in an intelligent railway location system and directly utilize factual knowledge in software engineering,a proposing-testing generic inference model was put forward.

The application of 3S technologies in highway route selection;

the Application of GIS Technologies in Highway Route Selection;

It is essential to recognize the environment and the features of mountain disasters for highway route selection.

According to significant optimum route adjustment for three times to Dahongshan Fe concentrates transport pipeline,the important role of route selection in construction investment control for long-distance slurry pipeline transport was expounded in detail.