Abstract: A large number of geological mapping data have been formed from application of digital geological mapping technology. They include spatial data and unstructured data. The problem as to how to provide effective network data-services is an issue that should be resolved urgently. The technology of big data provides a new method for data integration and services. In this paper, the authors selectively analyzed the characteristics of the data formed from digital geological mapping, and investigated the data processing framework of big data based on Geological Survey Information Grid. On such a basis, a method for data management, publishing and service was proposed, in which spatial data and unstructured data are integrated effectively. Experimental results show the feasibility of this method.