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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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Presentation Transcript
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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

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Forest Fires

Rapidly changing situation

Limited capacity of observation

Localized public warnings

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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 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) = ∑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?
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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