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*** Presented by David Evans at State of the Map 2013 ***
The Open Historical Map is billed as ""The world's most out of date map"". It is a complimentary approach using the Open Street Map tools that focuses on features that have since disappeared, changed shape or purpose. Because of scale and relevancy issues the Open Historical Map uses its own database instance that imports some of the features of Open Street Map. Editing of the map by users is encouraged, and most of the data comes from automated imports from other historical projects that contribute their mapping information. This presentation will review how the Street and Historical maps can be used together and the approaches used to handle problems of time and accuracy in the historical map.