Linked Open Geodata MeetupGraz, Sept 6 2011

Introduction

A. LangeggerLinked Open Geodata Meetup Graz, 2011 - CC-BY

http://news.bbc.co.uk/2/hi/871930.stm, http://www.phil.uni-passau.de/histhw/tutcarto/english/index-frames-en.htmlE. Livieratos et al: Ptolemy’s Geographia. In digits, e-Perimetron, Vol. 3, No. 1, 2008 [22-39].

16,500 BCE, caves at Lascaux, France Neolithic /Bronze age (6000–700 BCE), Borno, Italy

1,500 BCE, plan of Nippur, Mesopotamia

People need to know where they are & where to go

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 2

Ptolemy‘s (90-168 CE) Geographia – world map

1507 World Map by Martin Waldseemüller including America

Images:http://weblab.uni-lueneburg.de/kulturinformatik/projekte/ebskart/content/start.htmlhttp://en.wikipedia.org/wiki/Waldseemüller_maphttp://en.wikipedia.org/wiki/Mercator_projection

World map by Gerardus Mercator (1569)Mercator projection

Ebstorf Mappa Mundi (world map) ~1234 CEFound in Benedictine monastery, Ebstorf, Germany

We successfully explored and mapped our world

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 3

http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html

etc.

Projections with different properties have been developed over time...

4A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY

According to http://en.wikipedia.org/wiki/Web_mapping#History_of_web_mapping

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GPS-integrated mobile devicesAnnual shipments in M units, global forecasts 2007-2012Source: 2008 Parks Associates

5A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY

GPS integrated mobile devices

Open Geodata

• Open systems enable collaboration and engagement– Croud sourcing– Enable hidden experts, professional amateurs– Open APIs to support mashups & third-party apps– Cuts down overall costs– Helps to found new, innovative businesses

• Incentives– Private companies: impact, reach, innovation, croud sourcing– Government: efficiency, economic stimulus, open society

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 7

Potlatch browser plugin JOSM Java standalone editor

http://www.openstreetmap.org

OSM components

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 8http://wiki.openstreetmap.org/wiki/Develop

9A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY

Many donations of geodata:- TIGER (US)- plan.at (AT)- AND data (NL, China, India)- many regional/state governments (Germany, Italy, France, CH, ...) ...

Bing launched a small gameTo help connect housenumbers to streets which theywill donate back to OSM

http://open.mapquest.comhttp://frontdoor.cloudapp.net/

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 10

- started 100% user generated- map based on GPS traces + edits- croud-sourced traffic conditions

http://gadgetsteria.com/2010/02/17/waze-for-iphone-updated-personalized-alternative-routes-scoreboards-now-live/http://www.gpslodge.com/archives/035258.php

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 11

http://data.wien.gv.at

WMS & WFS also providedWMS & WFS also provided

First Apps already availableFirst Apps already available

All parkway trees areindexed as part ofVienna‘s tree register

The register is nowpublicly available:

http://www.wien.gv.at/umwelt-klimaschutz/baum-kataster.html

Vienna tree register now online

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 12

San Francisco‘s Urban Forest Map project

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 13http://www.urbanforestmap.org/

Linked Open Geodata

• Map featuresa) Geometric (points, polygons, relations, tags, etc.)b) Abstract features (street, building, bus stop, elevator...)

– Most abstract features are described somewhere elsee.g. Wikipedia, CIA world fact book, open gov data, ...

– Need to link to geo features from other entities on the web

• Maps– Map should be able to integrate LOD from other sources

(layer)– Static (more or less) vs. real-time information such as

traffic, weather, statistics, etc. How to cope with this?

– Open vocabularies and APIs needed

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 14

Linked Open Geodata could support OGD• Most government datasets have geo references

– POIs (e.g. administrative and public buildings)– Statistical datasets– Financial datasets– Events

• Linked Open Data could facilitate– Showing any geo-referenced data on a map

• POIs, boundaries, labels...• + Styling (e.g. MapCSS)• + Events (API)

– Integration of linked data from other sources– Facilitate analysis by queries (SPARQL + Addons)– Rendering maps for statistics, financial data, ...

A. Langegger, Linked Open Geodata Meetup Graz, 2011 - CC-BY 15

„Geo-referenced“: not only lat/lon, also

named entities

„Geo-referenced“: not only lat/lon, also

named entities