Gazetteer Resources, GAZ API
DBR’s survey of online gazeteers and APIs.
Temporal Gazetteer, TGAZ
TGAZ provides a search engine and machine-readable API for historical placenames in China, Russia, and Tibet.
China Historical GIS, CHGIS
The China Historical Geographic Information System is a collection of GIS data for the administrative geography of China and its changes over time, from 221 BCE to 1911 CE.