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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

Tom De Groeve


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


Tom de groeve

Forest Fires

Rapidly changing situation

Limited capacity of observation

Localized public warnings


Tom de groeve

Earthquakes

Impact unknown

Limited capacity of observation

Local authorities may be affected

Specific needs-driven response


Information gaps

Information gaps

Who?

  • Public

    What?

  • What is happening?

  • Should I flee?

  • What can I do?


Information gaps1

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 flow1

Information flow

Information flow


Situation assessment

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 assessment1

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 sources


Data curation sustainable

Data curation: sustainable?

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

  • Some external curation: Retrieve, validate, publish


Automated data curation

Automated data curation

Filter relevant messages

Content

No rumours

Statistics on relevant terms

Time critical

First 6h


Elements of quality assessment

Elements of quality assessment

Source

Credibility

Context

Location


Elements of quality assessment1

Elements of quality assessment

Source

Credibility

Context

Location


Elements of quality assessment2

Elements of quality assessment

Source

Content

Credibility

Relevance

Context

Location


Elements of quality assessment3

Elements of quality assessment

Source

Content

Credibility

Relevance

Context

Location


Implementation aspects

VGI

Topicality

Geo-location

Spatio-temp-oral Context

Integrated Quality Score

Implementation aspects

  • Sum of weighted scores:

    QS(VGIj) = ‚ąĎNi=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

Tsunami in Peru


Aftershock in turkey

Aftershock in Turkey


Conclusions

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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