[OSM-talk] Historical Data in OSM database

[Egil Hjelmeland]

If you prefix tag keys of  historic elements with  "past:", it will not 
interfere with extisting SW conserned with rendering the present state. 
Examples: "past:building=y", "past:highway=..." At the same time it 
should be easy to render historic maps based on existing styles.

I doubt that historical mapping will add significantly to the OSM 
database size on the global scale. But if I am wrong, it will certainly 
add value to OSM, IMHO.

(I first thought of "historic:" prefix, but that can be misunderstood to 
mean present object of historic interest.)

BR/Egil Hjelmeland