Abstract: The construction of a new basic surveying and mapping system is an important development strategy for improving the ability and level of the basic surveying and mapping service in our country. As a typical mountainous city, Chongqing has a strong urgency in the research and construction of its new basic surveying and mapping system. Based on the perfect system of mapping geographic information system, modern surveying and mapping datum, and three-dimensional data collection and updating system, the Chongqing geo-information bureau has carried out the "3D+" pan-information spatial database and its application and demonstration construction. A pan-information, fine and dynamic three-dimensional spatial data system has been constructed to realize the fusion ability of pan-spatial, virtual-reality and static-dynamic. Taking Chongqing as the sample, the transformation and upgrading path of basic surveying and mapping has been formed, that will promote the deep integration of industry information and geographic information.

Key words: new basic surveying and mapping, 3D+, pan-information, pan-spatial, refinement, virtual-reality fusion, static-dynamic fusion