Method of Information Extracting from Section Map Based on ActiveX Technology

In the production of hydrographic surveying, a lot of inside work are still manually completed, time-consuming and error-prone, such as dimensioning of Basal Area and table. This paper discusses extracting river cross-sectional information from CAD with ActiveX software integration technology, some information is also processed and excavated, and Basal Area and earthwork table are automatically completed. Therefore these works achieve greater efficiency and quality of work. Undoubtedly, it has great applied value.