Primary sources geographically organized

The Edwin C. Bolles Collection: A Digital Archive on the history and Topography of London at Tufts University describes places in an urban environment using literary texts and images.

Recent Web Mash-up technology allows maps to be used as precise geographical indexes.

Burma - Yunnan - Bay of Bengal (c. 1350-1600) begs to be indexed in this fashion.

The greatest obstacle is mapping old place names in texts to modern maps.

(Cited in cited in The Little Professor which was cited in Brad DeLong's Semi Daily Journal)