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Published byGudrun Lund Modified over 6 years ago
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The use of distance data in Statistics Denmark - a general view
Michael Berg Rasmussen
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Pure distance measurements
Using distance data Pure distance measurements Proximity analysis
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Pure distance measurements
Distance measured in a bee line (Euclidian distance) between points placed by co-ordinates Distance between addresspoints measured through a network
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Distance between summer cottages and the coastal line
Distance in bee line measured by making a Spatial Join in ArcGIS
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Distance between addresses using a network
Distance measures as the shortest distance through a network of roads (calculate using Dijkstras algoritm). Special application is used (FleetView Integration)
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Proximity analysis Analysis of a catchment area - e.g. to know the number of fellow citizens, working places etc. that can be reach within a given distance Buffer (measured out in bee line) Service area (measured out through a network) Nearest neighbourhood-calculations – examine how far to go out for a given condition to be fulfilled
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Analysis of a catchment area(1)
Buffers and sevice areas can be created in ArcGIS Only a limit number of such analysis can be made in ArcGIS due to perfor-mance
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Analysis of a catchment area(2)
Countrywide analysis (involving ”Big data”) most be done on a Oracle platform Distance measuring done in 100×100m-gridcells to reduce the number of calculations
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Nearest neighbourhood calculation
EquiPop – a small GIS-program made to analyze the nearest neighbours from an origin Uses the gridnet Until now mostly used in the Urban Europe-project
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