The Design Of Query Original System For Elevation Anomaly

In this thesis, the query system of elevation anomaly in the computer is introduced, which is developed by Visual Basic. And the system aims at the present situation of enquiring elevation anomaly by hand work. The system solves well some critical questions of digitizing elevation anomaly isograms, establishing memory bank of elevation anomaly,inserting arbitrary elevation, coordinating transform, minifying the elevation anomaly isograms and divagating isograms. At last the system is tested by part of data of the small—scale elevation anomaly map in the north of China. The precision of this system is reliable and its operation is easy. And the function mainly meets the requirement of design. It can provide much information to the plotting department.