Research on Construction of Integrative Geographical Data in Digital City Management: A Case Study of Zhengzhou City

摘要

Based on the geographical data construction requirements of digital city management, current situation of fundamental geographical data and city management resources, and demands for such kind of data from land and planning department in Zhengzhou, we presented an integrative process for constructing digital city management geographical data. The process was designed and operated according to the connection of aerial survey of 1:500 topographic map, 1:1000 DOM production, urban components and geocodes survey, and integrated database construction. The integrated process makes full use of the interaction in these operation procedures, and could ensure fulfillment of city fundamental geophysical data, components data collection and database construction in large area in short period. The practice showed that the integrated geographical data construction process reflected the logical connection and possibility of sharing among data, it could accelerate the progress of data construction, widen its content, and ensure its quality.