olav ten bosch and edwin de jonge statistics netherlands unece - meeting on the management of...
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Olav ten Bosch and Edwin de JongeStatistics Netherlands
UNECE - Meeting on the Management of Statistical Information Systems (MSIS)
Luxembourg, 7-9 April, 2008
Visualisation of Neighbourhood Statistics
using Google Earth
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Contents
- Introduction
- Regional Statistics in StatLine
- Traditional mapping versus streaming photo-based
mapping
- A dual Approach:- CBS in your neighbourhood
- Google Earth layer
- Work in progress
- Conclusions
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Introduction
– Statistics Netherlands has many statistics at neighbourhood level
– Available in statistical database StatLine– Regional statistics can be presented more
attractive and understandable in maps– StatLine maps:
• generated on the fly from the database• SVG (less popular and problematic in browsers)• People have to “know” how to generate a map
– There must be a better solution
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Regional Statistics in StatLine (1)
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Regional Statistics in StatLine (2)
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Regional Statistics in StatLine (3)
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Traditional mapping versus streaming photo-based mapping
– Traditional mapping:• Each mapping engine has its own user interaction
mechanism• The user has to specify certain parameters• Maps are sent over completely
– Streaming photo-based mapping:• de-facto user interaction (zooming, panning etc)• Combining air- or satellite photos with other information• Efficient streaming mechanism for (geo)data• Extendable, you can add other information layers• Only a few flavors:
– Google Earth / maps– Microsoft Virtual Earth– OpenStreetmap
– Statistics should use this trend
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Maps people use in their daily life
Traffic infoHouses for sale
Crime facts
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A Dual approach• We use general mapping technology
– Google maps and Google earth– People “know” these interfaces– 11,000 neighbourhoods:
• Detailed borders• 21 variables (inhabitants, income, age)
• Two “products”:– “CBS in your neighbourhood”:
• http://www.cbsinuwbuurt.nl/• Website for everyone, no plugins required
– “CBS on Google Earth”: • for advanced users• CBS layer accessible from CBS website• http://www.cbs.nl/gearth (Dutch version)• http://www.cbs.nl/.../gearth.htm (English version)
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– CBS created statistical layer for GEarth:• GEarth free tool (needs to be installed)• GEarth has a well-defined data format (KML)
– Two ways to access:• CBS data in next (Dutch) GEarth release• Google Earth layer available on website CBS
– Use streaming mechanism of GEarth for efficient data transport:
• Only the data of the viewing area is sent over
– Ability to combine statistical data with other geodata
“CBS on Google Earth”
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“CBS on Google Earth”:
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“CBS on Google Earth”:
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– Heat maps for regional variables:• Population density• Ratio of men to women• Other variables
– Animated statistics:• Use the time facility to visualise statistical trends• Changing neighbourhood borders• Changes in population, age, households etc.
Work in progress
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“Population Density on Google Earth”
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“Ratio of Men to Women on GEarth”
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Conclusions
• Follow the trend:– In addition to traditional maps we use
modern web-based streaming mapping techniques for dissemination of regional statistics
• Dual approach for different user groups:
– Easy site CBS in your Neighbourhood for everyone
– Google Earth layer for advanced use
• Work in progress:– Projecting variables on GEarth– Animation