This document discusses an open smart city platform called SFCity that allows any city to leverage existing assets as sensors without high costs. It describes projects in Japan that used public garbage trucks and city staff as sensors by transforming their daily activities into IoT data streams. The platform also transforms existing web data into sensor data streams. This approach generates massive IoT data for applications without new sensor deployment. SFCity provides unified APIs and has been deployed in Fujisawa City, powering applications for city management, reducing garbage, and disaster response by integrating data from vehicle sensors, citizen reports, and 10,000 web sources.

2. Takuro Yonezawa
Keio University, Japan
Boot the Open Smart City

3. EU-Japan Collaborative Smart City Project
(2013-2015)
(2016-2018)
Funded by FP7/NICT
Funded by Horizon2020/NICT
ClouT Project
BigClouT Project

4. Video

5. Real World Cyber World
Tv ＝now - d
Tr= now
Data
Sensing
Current
Volume&Speed UP
Tv ≈ nowTr = now
Big Data
Sensing
Seamless collection of
various sensor data
(IoT, People, Web)
Knowledge
acquisition &
Sharing
Tr= now’ Tv ＝now + D
Choose
Future
Prediction (ML, analysis)

6. What is ‘Smart’ City
• City which has A&R: Awareness and Responsiveness
– Awareness: Understand/Predict City in Real-Time
– Responsiveness: Change city’s functions/behaviors according to it’s
situation
LIFE ENVIRONMENT ECONOMY etc..

7. From Legacy City Elements to Smart Community, City
Self-A&R
Surrounding-A&R
Application
Automated Driving
Smart Navigation etc.
Community-A&R
Legacy
City Element
Smart
City Element
Smart
Organization,
Community..
IoT
Empowerment
Data
Sharing
Application
Smart Delivery
Scheduling
etc.
100Hz Data
1Hz Data
* 100 cars

9. Available on http://www.sfcity.jp
SFCity: Open Smart City Platform
 Coping with various physical/virtual sensors
 Providing unified APIs for various languages
 Flexible Data Sharing
Make ready
as smart city elements
Share tons of data
for smart city users

10. Example of city data volume and diversity

11. Example of city data volume and diversity
⦁Environment Type
Temperature・Humidity
Weather・UV
Pollen・PM2.5/NOX/NO2..
Rain・River Level・Sea Level
Earthquake
⦁Industry Type
Stock price
Gas price
Catch of Fish
Public transportation info.
Blood donation
Advertisement num.
Job offer
Housing price
⦁Human flow
Parking lot info.
Traffic congestion
Number of tweets
Safety info.
Num. of people in Beach
Police information
Construction info.
Energy Power Consumption
Amount of garbage
Congestion of buses
Hotel availability
Number of Crime
Participatory Sensing
….
All data can be
accessed as
sensor data stream
Using
Sensor-over-XMPP
technology

12. Human flow + parking lot(with Tokyo Univ.)
Various data (with ClouT)
Environmental data
Parking lot
Video

13. Boot the Smart City
by maximize utilization of existing city assets
• Public Cars as Sensors
• WEB as Sensors
• Crowd as Sensors
How can we collect/share massive city data
in a sustainable way ?
Not only for rich cities - for Any Cities
Example:
Fujisawa City, Japan

14. 1. Public cars as Sensors
 Garbage trucks go around entire city everyday
 Spatially full-covered environmental sensing

15. 1. Public cars as Sensors
Leveraging daily-use public cars for city sensing
With NTT R&D
Video

16. 2. WEB as Sensors
Transform WEB(without APIs) to
IoT Data Stream instantly
• Websites about city already exist a lot
• Some of them are periodically updated
• Act alike sensors
Change such websites to real IoT data stream
One billion websites

17. WEB Sensorizer
(Google Chrome Plugin)
Auto finding&sensorize
Manual sensorize
X
2 ways of sensorize

18. Data Finder Data Warrior
Finding and
activating good
sensors !
Creating new
services with the
sensors!
… Smart
city
apps.
Sensorizer Leveraging
City data excavation
hackathon
City application
hackathon
…
Internet
Data
digging
Smart City API-Ready Sensors
Data Excavation Hackathon
not only use already-opened data, but also find&sensorize data

20. 3. Crowd as Sensors
Virtual Sensor Nodes
StreetLight
DeadAnimal
DisasterReport
Graffiti IllegalGarbage RoadDamage
Citizen / City Staffs
as data publisher
City
Apps.
Photo,
GPS,
Comment..
Publish
Data Stream

21. ~100 reports per day
from city staffs

22. Multi-sensors integrated Applications

23. Virtual IoT Sensors
Virtual WEB Sensors
Virtual Crowd Sensors
UnifiedAPIs

24. City Sensors
Video

25. Lesson Learnt
• Only big companies / cities can lead smart city ?
– should be NOT !
• Possibility to
– leverage daily city service as sensing tasks
• “sharksucker” sensing with public cars
• City staffs acting as sensor
– generate massive IoT data stream without new IoT deployment
• Possibility to leverage any city information to enhance any existing
services
– Open the data, then open community can leverage the data
– Open Smart City Ecosystem

26. SFCity Platform: Boot the Open Smart City
• For any cities without high cost
• Maximize utilization of existing city assets
• SFCity: open smart city platform
– Enables to change WEB to data stream
– Providing unified access to various data stream
– Available online: http://www.sfcity.jp
• Real deployment to Fujisawa city, Japan
– 100 garbage trucks has been sensorized
– 3,500 city staffs can act as sensors
– 10,000 Various WEBs has been sensorized
– Use for city management, reducing garbage, disaster management.

27. Thank you very much !
Contact: takuro@ht.sfc.keio.ac.jp
... And more
Our Team