michael hewett national centre for geographic & resource analysis in primary health care...

Michael HewettNational Centre for Geographic & Resource Analysis in Primary Health Care (GRAPHC),Australian Primary Health Care Research Institute (APHCRI), Australian National University (ANU)

Enabling Location Privacy Without Loss of Location Accuracy

National Centre for    

Geographic & Resource Analysis in Primary Health Care(GRAPHC)

1

Primary Health Care Research GIS Resource

• Spatially enabling data• Providing spatial linking mechanisms• Improving availability of tools & processes• GIS skills resource• Web based mapping

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 2

Primary Health Care Research & Privacy• Especially important in Health Care Research context• Legal and Ethical Protections

– Researchers– Doctors/Data Originators

• Trust• Researchers need to Share Data

– Research Validation– New research

• Involves more than just the research data

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 3

Cartophobia

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 4

Privacy: De-identification• Replace name with

patient ID.• Remove Location• Use coordinate• Use Suburb or Postcode• Replace location with ID

Name George Somebody

Address 48 Alder Close, North Adelaide, 5006, SA

Age 92

Condition Cartophobia

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 5

Patient ID 1234

Address 48 Alder Close, North Adelaide, 5006, SA

Age 92

Condition Cartophobia

Privacy: Coordinates?.......

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 6

Patient ID 1234

Coordinates 34.907S 138.588E

Age 92

Condition Cartophobia

Privacy: Suburb or Postcode?.......

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 7

Patient ID 1234

Postcode 5006

Age 92

Condition Cartophobia

Privacy: Location ID?• Location ID

– Cross Linking– Must link to location for processing

• GeoHash– Decodable To Location

• Encryption– Decryptable– Must be decrypted before Analysis– Cross linking even without decoding

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 8

Other Options• Ethical/Legal clearance to use

addresses and coordinates• Pre-aggregation• Third party secure data environments

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 9

So where next?

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 10

- Location without Context- Context without Location

GRAPHC - Location• GTAG• Address/Location Name• Point location

User - Context• GTAG• Patient details

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 11

GTAG ee940ffb-d1ce-442f-9511-51ea2ae09f59

Location Name 48 Alder Close, North Adelaide, 5006, SA

Location 34.907S 138.588E

Patient ID 1234

GTAG ee940ffb-d1ce-442f-9511-51ea2ae09f59

Age 92

Condition Cartophobia

Point LocationsHigh Resolution Analysis And Resampling

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 12

Address Registration

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 13

GTAG ee940ffb-d1ce-442f-9511-51ea2ae09f59

Location Name 48 Alder Close, North Adelaide, 5006, SA

Location 34.907S 138.588E

Patient ID 1234

Address 48 Alder Close, North Adelaide, 5006, SA

Age 92

Condition Cartophobia

Patient ID 1234

GTAG ee940ffb-d1ce-442f-9511-51ea2ae09f59

Age 92

Condition Cartophobia

Address

GTAG

Authorisation And Geocoding

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 14

Analysis/Geoattribution

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 15

GTAGS

d0827f07-1ae4-470b-a181-71fbbf45c703a76c5f8b-eab9-4d33-b4c8-df5277a4208249da96f4-8f76-4234-a5f3-190bac12d81243d4543d-8332-4c30-9447-8bf989a1c7b5784fc98f-ee89-4ee5-8ac4-0e627c87d3a6666632b8-3b61-468d-bae9-f6f5c5dd7012b9b474a6-99ad-4b0a-9b6d-8b91f0fc326665c00240-6567-4dad-8cb3-72a8b14a8f7b60660490-5711-4d80-ac56-0f500d9937cf589aff37-5fc6-451b-a50b-916598c1133d94934e0e-f1cc-4610-9c8e-2c26ad08b8735b1bfee9-884c-4069-85be-d46f35965f5b76605729-bfc5-4b23-a45b-e53860c72c98da306438-22fa-4b21-a18a-fdd222529587

GTAGs

AnalysisResult

GTAG LGA_CODE Score NRank NDecile

d0827f07-1ae4-470b-a181-71fbbf45c703 10050 979 288 6a76c5f8b-eab9-4d33-b4c8-df5277a42082 10300 946 160 349da96f4-8f76-4234-a5f3-190bac12d812 10150 1015 427 843d4543d-8332-4c30-9447-8bf989a1c7b5 10050 979 288 6784fc98f-ee89-4ee5-8ac4-0e627c87d3a6 10050 979 288 6666632b8-3b61-468d-bae9-f6f5c5dd7012 10050 979 288 6b9b474a6-99ad-4b0a-9b6d-8b91f0fc3266 10150 1015 427 865c00240-6567-4dad-8cb3-72a8b14a8f7b 10650 954 197 460660490-5711-4d80-ac56-0f500d9937cf 10300 946 160 3589aff37-5fc6-451b-a50b-916598c1133d 10050 979 288 694934e0e-f1cc-4610-9c8e-2c26ad08b873 10750 968 249 55b1bfee9-884c-4069-85be-d46f35965f5b 10050 979 288 676605729-bfc5-4b23-a45b-e53860c72c98 10750 968 249 5da306438-22fa-4b21-a18a-fdd222529587 10650 954 197 4

Leveraging ESRI Technology

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 16

GRAPHC Databases & Geodatabases

ArcGIS Desktop - Map And Data Layers

Model Builder – Geoprocessing

Models

Independent Custom Code

External ESRI users - Desktop, Online,

Explorer, etc

ArcGIS Server

GRAPHC Custom Tools & Apps

Custom Web APIs

Custom Code and Scripts leveraging

ESRI APIs & libraries

3rd Party Custom Tools & AppsHealth

Landscapes

GRAPHC ArcGIS Online Maps & Apps

Accessing GRAPHC Data

GRAPHC Databases

ArcGIS Server

ArcGIS Desktop ArcGIS OnlineArcGIS

Explorer/Desktop Explorer

Health Landscapes Australia

Custom Geoprocessing

Services and Tools

Custom GRAPHC Apps and APIs

Third Party Apps and APIs

Custom Web APIs

Custom GRAPHC Apps and APIs

Third Party Apps and APIs

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 17

Indirect Engagement

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 18

• GTAGs are already being engaged by:– A major data extraction company– A secure data service environment– Several Medicare Locals– Other Universities– Research Projects

• Under Review for use by:– CSIRO, CRCSI,

• Potential for anywhere that location privacy is important

How Much does this cost????• Free location registration and

administration.• Cost Recovery Model• Community Cost Sharing• Commercial Use – Contact GRAPHC

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 19

Live Demo

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 20

http://graphc.aphcri.anu.edu.au

graphc@anu.edu.au

Michael Hewett, GRAPHC (http://graphc.aphcri.anu.edu.au) 21