From the Wiki description.

The Contact-Period Native California Community Distribution Model (CDM) is a digital atlas and wiki encyclopedia that models the socio-political landscape of native California at the time of first contact with the Spanish, a rolling moment from the 1770s to the 1830s. The CDM atlas portrays a model distribution of 663 community regions (inferred or known village communities or tribelets) across California on a GIS digital map layer, divided into 14 analytical zones that combine regions on the basis of mutual histories, shared language, and similar land-use patterns. The associated encyclopedia consists of "wiki" monographs that gather together archival information for each of the community regions (i.e., presented within a collaborative website that allows for creation and controlled editing of interlinked web pages). An additional key element, a Mission Register database, provides locational information for the CDM regions from which the people were entirely removed to the Franciscan missions between 1770 and 1835. These separate elements together form the CDM (Figure 1).