Open Historical Map

"The World's Most Out of Date Map"

OSM is a community for collaboration in data creation

very flexible in tagging, data mgmt and tools

start_date=
end_date=

but only handles the now

Sandbox

rails app

mod_tile
http://tiles.openhistoricalmap.org/
17900709/18/74975/100263.png

data extracts

load in test areas

British Bombay geocoder

Tenochtitlan web maps

Questions:

• How to represent time?
• Spherical Mercator of Time
• The past in uncertain. Representing/handling historical scholarship
• How does a feature remain the same feature?

Get Involved!
http://lists.openstreetmap.org/listinfo/historic
http://wiki.openstreetmap.org/wiki/OHM

Old Sky

1940s/50s/60s RAF Aerial Surveys of British Colonies

Rescued to Bodelian Library

Hundred thousands of images in a basement in Oxford

Process:

• Try to index by flight plans
• Order boxes from basement
• Search through hundreds of images
• scan (if out of copyright)
• composite and georeference and tile

Kibera Today

Kibera 1961

urban development, land use change, forest cover, water resources

Cost of doing on large scale in millions
Iterate: Kickstarter?

Old Sky: 10 cities / $10k

thanks Paolo Paron