JerryJerry CloughCloughSK53 on OpenStreetMap

@SK53onOSMSK53.osm@gmail.com

Maps Matter Blog : www.sk53-osm.blogspot.com

OHM Strapline CandidatesOHM Strapline Candidates

–A map of everything that has ever existed

–Putting a time-slider on the World–The World's most out of date map

OpenHistoricalMapOpenHistoricalMap

● Newish project, kicked-off SF April 2013

● Based on OpenStreetMap technology ('the stack')

● No formal ontology or rules– Elements & Time described by

free-form tagging

– No validation

● Mainly repository of vector map data

● Open data (OdbL/CC-BY-SA)

● Close links with – Wikimedia Commons (Wikimaps)– GLAM (Galeries, Libraries, Archives &

Museums) Wiki

– Wikidata

– OpenStreetMap– Open Knowledge Foundation

● Participants– GIS specialists (e.g., Topomancy LLP)– Academics (mainly CS)– Wikimedians

– OpenStreetMappers

● Infrastructure hosted by Topomancy

URL: www.openhistoricalmap.org

OSM Historical Starting Point

OSM Nottingham : Example 1Dead Pubs

OSM Nottingham : Example 2Listed Buildings &

Old Maps

http://osm-nottingham.org.uk/?z=16&lon=-1.15010&lat=52.95162&bgl=Salmon,1,11&l=listedbuildings&lh=GradeII

Open Historical MapOpen Historical Map Now Now

Step 1 : Georectify Old Map(s)

http://mapwarper.net

Step 2 : Create vector map in editor

Step 3 : Render the data

Derby Derby RoadRoad

Derby Derby RoadRoad

Derby Derby RoadRoad

No. Start location End location Start Date End Date

1 Priory Roundabout

Adams' Hill 1800 9999

2 Adams Hill Lenton Lodge 1800 1825

3 Adams Hill Lenton Lodge 1825 9999

4 Lenton Lodge W of Rose and Crown

1800 9999

5 W of Rose and Crown

E of Rose and Crown

1800 1936

6 W of Rose and Crown

E of Rose and Crown

1936 9999

7 Three Wheatsheaves

Faraday Road 1800 1910

8 Three Wheatsheaves

Faraday Road 1910 9999

9 Faraday Road Tollhouse Hill 1800 9999

NYPL Building InspectorNYPL Building Inspector

http://leatherwood.herokuapp.com/footprint

OHM Current & Future OHM Current & Future DevelopmentsDevelopments

Summary : OHMSummary : OHM

NowNow● Ready for sets of 'snapshot'

data ● Temporal data (tags) manual

process● Routing● Limited automated rendering

– Existing tools (TileMill) fine for specific needs

To comeTo come● More & better examples

– Pre 1800 too

● Integrating temporal tools into website & editor– Time-sliders

– Map Warper

● Additional QA tools● In browser rendering

Time SliderTime Slider

● Unifying element for:– Search– Editing data– Viewing data

● Across OHM / Wikimedia● Prototype work

– Summer 2014 GsoC student

● Date & Period based● Range or 'Snapshot'

More ToolsMore Tools

● Building Inspector– Ports currently in

progress (with NLS)

● Integration of MapWarper in editor

● Additional semi-automated data capture

● Map Roulette

● QA tools– Many exist in OSM

– Identify problems to fix

● Overlapping temporalities

● Temporal Geocoder

Tangible ChallengesTangible Challenges

● Data volumes● Creating maps (rendering)● Editing & fixing data● Imprecise temporality● Calendars

– implicit proleptic Gregorian

● Buildings– 3D (some existing OSM work)

– Phased construction

http://demo.f4map.com/#lat=41.8909282&lon=12.4906339&zoom=17

Data VolumesData Volumes

● Potential combinatorial explosion of data elements– Exploration using OSM data suggests not major problem

– Some mitigation routes possible

● Link to wikidata to need for multiple elements– Name changes

– Historical population

● Urban areas much smaller in past● Change mainly localised

●Classifying ChangeClassifying Change

RenderingRendering

http://www.openhistoricalmap.org/#map=14/40.7766/-119.2265&layers=H

● Current Approach– Static Rendering

– Requires new tiles for each time period

● Future Approach– In browser rendering

● Vector Tiles● MapCSS

More informationMore information

PresentationsPresentations– SotM Baltics 2013

Susanna Anas, Wikimedia Finland

– SotM Birmingham 2013David Evans, U. of Derby

– SotM Karlsruhe 2014Tim Waters, Topomancy

Blogs etcBlogs etc.● Wikimaps

Wikimedia Zurich May 2014Susanna Anas

● Maps MatterTartu workshop August 2013Jerry Clough

Mailing ListMailing List● https://lists.openstreetmap.org/pipermail/historic/

Monthly Google HangoutsMonthly Google Hangouts● Via Susanna ÅnäsVia Susanna Ånäs