Research of Hydraulic Medium-Small Rivers in City Construction Surveying and Mapping Technical Method

Combined with specific examples of projects,this paper introduced hydro commonly found in the city and the river in measuring engineering structure building type,investigation and measurement field and the corresponding accuracy index,content choice and mapping representation method,especially explored the technology method of surveying and mapping on it on the basis of field water engineering construction structure of the building size and the complexity,and proposesd the corresponding solution with CAD mapping system.