We report on research into building a cyberinfrastructure for Chinese biographical and geographic data. Our cyberinfrastructure contains (i) the McGill-Harvard-Yenching Library Ming Qing Women's Writings database (MQWW), the only online database on historical Chinese women's writings, (ii) the China Biographical Database, the authority for Chinese historical people, and (iii) the China Historical Geographical Information System, one of the first historical geographic information systems. Key to this integration is that linked databases retain separate identities as bases of knowledge, while they possess sufficient semantic interoperability to allow for multidatabase concepts and to support crossdatabase queries on an ad hoc basis. Computational ontologies create underlying semantics for database access. This paper focuses on the spatial component in a humanities cyberinfrastructure, which includes issues of conflicting data, heterogeneous data models, disambiguation, and geographic scale. First, we describe the methodology for integrating the databases. Then we detail the system architecture, which includes a tier of ontologies and schema. We describe the user interface and applications that allow for cross-database queries. For instance, users should be able to analyze the data, examine hypotheses on spatial and temporal relationships, and generate historical maps with datasets from MQWW for research, teaching, and publication on Chinese women writers, their familial relations, publishing venues, and the literary and social communities. Last, we discuss the social side of cyberinfrastructure development, as people are considered to be as critical as the technical components for its success.geospatial ontologies | prosopography | ontology integration W e report on research into building a cyberinfrastructure (CI) for Chinese biographical and geographic data. This CI contains the McGill-Harvard-Yenching Library Ming Qing Women's Writings database (MQWW), the China Biographical Database (CBDB), and the China Historical Geographical Information System (CHGIS). It represents the integration of important data related to the humanities. CHGIS is one of the first historical GISs in the world. MQWW is the only online database on historical Chinese women's writings. The two major databases in Chinese history are the CHGIS and the CBDB. They serve as central repositories of historical geoadministrative units and official names of notable individuals. Substantial resources have been devoted to the accurate depiction of places for each time period and provenance of names. Additionally, China possesses the largest number of biographies in the world.Key to this integration is that the databases to be linked retain their separate identities as bases of knowledge, while they possess sufficient semantic interoperability to allow for multidatabase concepts and to support cross-database queries on an ad hoc basis. We aim for flexibility within the system architecture, in cases where the data structure needs to be altered for new o...