Open Historical Map: re-using obsolete information - State of the Map 2013
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Open Historical Map: re-using obsolete information - State of the Map 2013

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*** Presented by David Evans at State of the Map 2013 *** ...

*** 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The Open Historical Map is billed as ""The world's most out of date map"".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.

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    Open Historical Map: re-using obsolete information - State of the Map 2013 Open Historical Map: re-using obsolete information - State of the Map 2013 Presentation Transcript

    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Open Historical Map: re-using obsolete information or, the world’s most outdated map David Evans3 Jeff Meyer2 1 Rob Warren1 et al. rwarren@dal.ca Dalhousie University, Canada 2 jeff@gwhat.org San Francisco, USA 3 d.f.evans@derby.ac.uk University of Derby, UK State of the Map: Birmingham 2013 Evans, Meyer, Warren et al. Open Historical Map 1/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Presentation Outline 1 Introduction - Why OHM? 2 Use cases 3 Data Feeds to it 4 Conclusion Evans, Meyer, Warren et al. Open Historical Map 2/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Introduction Born from many competing ideas about historical mapping. Using its own database, as opposed to OpenSeaMap. OHM prefix for tag namespaces (ohm:military:wireObstacle). Slightly modified toolchain. Primary interested in things that aren’t there anymore, or that have a historical value. Evans, Meyer, Warren et al. Open Historical Map 3/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Seattle, then (1860) and now - Jeff Meyer http://www.openhistoricalmap.org/?lat=47.60075949&lon=-122.332471&zoom=17&layers=H Evans, Meyer, Warren et al. Open Historical Map 4/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Initial Drivers Born from many competing ideas and projects dealing with historical mapping. Academic, government and hobby projects generate GIS data that needs a home. “Users” tend to be institutional / research employees that don’t want to hand edit things but provide data dumps. OHM vs. OSM Data comes from scripted processes - if you break it, you fix it. Aggressive use of start_date, end_date and historic:era both as a search key and rendering hint. Evans, Meyer, Warren et al. Open Historical Map 5/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Use cases Primary use as repository of historical GIS information. Recycling all of those edits that ended up deleted (or have date_end) from OSM. Useful as secondary layers - what was here before?. Search for lost features, places and things. An obvious “Killer App” is safety during excavation. Evans, Meyer, Warren et al. Open Historical Map 6/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion What was here before?! Evans, Meyer, Warren et al. Open Historical Map 7/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Forgotten infrastructure can be deadly Source: http://myblog.it/ Evans, Meyer, Warren et al. Open Historical Map 8/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion What was here before?! Evans, Meyer, Warren et al. Open Historical Map 9/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Corpses need mapping too! http://www.openstreetmap.org/#map=17/44.63910/-63.57568 Evans, Meyer, Warren et al. Open Historical Map 10/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion London Crossrail Dig Sites http://www.crossrail.co.uk/sustainability/archaeology/ case-study-archaeology-at-crossrail-liverpool-street-site Evans, Meyer, Warren et al. Open Historical Map 11/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Process Muninn WW1 WikiMaps OpenHistoricalMap OpenStreetMap LinkedGeoData LOD Evans, Meyer, Warren et al. Open Historical Map 12/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Great War Trenches Overlays Moeuvres, France http://www.openhistoricalmap.org/?lat=50.16668&lon=3.053815&zoom=16&layers=H Evans, Meyer, Warren et al. Open Historical Map 13/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Great War Artillery Locations Inchy-En-Artois, France http://www.openhistoricalmap.org/?lat=50.17405&lon=3.05191&zoom=16&layers=H Evans, Meyer, Warren et al. Open Historical Map 14/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Wikimaps 1/3 Record mapping meta-data in Commons. Extract data from maps images already available. Evans, Meyer, Warren et al. Open Historical Map 15/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Wikimaps 2/3 Warp / Re-project the Map. Available as a web service. Acts like a WMS and OSM xyz tile server. Evans, Meyer, Warren et al. Open Historical Map 16/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Wikimaps 3/3 Evans, Meyer, Warren et al. Open Historical Map 17/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Rendering with OHM Trying to get rendering of the map is ... annoying. Fighting with the renderd codebase while trying to make sense of multiple ways of seeing time. (How do we transform "The 1860’s" into a date query?) Attempting to use a simple rendering system based on start_date and end_date. Some rough starts - We need help with rendering! Evans, Meyer, Warren et al. Open Historical Map 18/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Links within and without OHM Experimenting with OHM:SameAs - add a owl:sameAs to the LOD? Lessons from Time Ontology - start_date:before and/or start_date:after? Link nodes in OHM imported from OSM using OHM:OSMOriginal? Linked Open Data has interesting applications to fuzzy information. before, after, during, partOf Very Experimental. Record whatever data we have now and let the renderer decide later... Evans, Meyer, Warren et al. Open Historical Map 19/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion Help wanted! Different rendering styles needed (NATO,Archaeological,Hazmat Map styles?). Historical applications abound - let’s use the data! OHM/OSM are great data integration points with other databases (wikipedia, LOD). Evans, Meyer, Warren et al. Open Historical Map 20/22
    • M AK E A M AP ! Introduction - Why OHM? Use cases Data Feeds to it Conclusion Evans, Meyer, Warren et al. Open Historical Map 21/22
    • Introduction - Why OHM? Use cases Data Feeds to it Conclusion More Talking Open Historical Map mail-list: http: //lists.openstreetmap.org/listinfo/historic Open Historical Map irc: #hosm on irc.freenode.net github https://github.com/OpenHistoricalMap http://www.openhistoricalmap.org/ Evans, Meyer, Warren et al. Open Historical Map 22/22