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Tom De Groeve. Quality from Quantity Deriving actionable knowledge from social media streams. Tom De Groeve, Beate Stollberg Frank Ostermann , Laura Spinsanti European Commission, Joint Research Centre, Ispra , Italy. Forest Fires Rapidly changing situation

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Tom De Groeve


Quality from Quantity

Deriving actionable knowledge

from social media streams

Tom De Groeve, Beate Stollberg

Frank Ostermann, Laura Spinsanti

European Commission, Joint Research Centre, Ispra, Italy


Forest Fires

Rapidly changing situation

Limited capacity of observation

Localized public warnings


Earthquakes

Impact unknown

Limited capacity of observation

Local authorities may be affected

Specific needs-driven response


Information gaps

Who?

  • Public

    What?

  • What is happening?

  • Should I flee?

  • What can I do?


Information gaps

Who?

  • Public

    What?

  • What is happening?

  • Should I flee?

  • What can I do?

Who?

  • International response

    What?

  • What really happened?

  • Should I deploy?

  • What are the needs?


Information flow

Information flow


Information flow

Information flow


Situation assessment

What kind of earthquake is it?

1 day

20min

Deployment?

Earthquake

Magnitude 7

Tsunami 2m

Population 1 million

OSOCC

LEMA in charge

USAR teams

Control centre


Situation assessment

What kind of earthquake is it?

Killed?

Collapsed?

Black out?

Earthquake

Magnitude 7

Tsunami 2m

Population 1 million

OSOCC

LEMA in charge

USAR teams

Control centre

Schools?

Airports?

Injured?

Hospital?


Data sources


Data curation: sustainable?

  • Full external curation: retrieve, rate/score, and publish

  • Some external curation: Retrieve, validate, publish


Automated data curation

Filter relevant messages

Content

No rumours

Statistics on relevant terms

Time critical

First 6h


Elements of quality assessment

Source

Credibility

Context

Location


Elements of quality assessment

Source

Credibility

Context

Location


Elements of quality assessment

Source

Content

Credibility

Relevance

Context

Location


Elements of quality assessment

Source

Content

Credibility

Relevance

Context

Location


VGI

Topicality

Geo-location

Spatio-temp-oral Context

Integrated Quality Score

Implementation aspects

  • Sum of weighted scores:

    QS(VGIj) = ∑Ni=1wisji

  • Topicality: keyword-based

  • Proximity: next concurrent reported hotspot

  • Land cover: Forest, no-Forest, Built-up

  • Population Density: Risk factor

  • Information clusters: Similar messages or lone signal?


Tsunami in Peru


Aftershock in Turkey


Conclusions

  • From Quantity to Quality

    • Integrated Quality Score

    • Credibility

    • Relevance

  • Build answers for information gaps

  • Build answers for decision processes

  • Who takes responsibility? Who is liable?


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