Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands...
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Transcript of Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands...
![Page 1: Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands nlwe@cbs.nl.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649f225503460f94c3a80a/html5/thumbnails/1.jpg)
Delineating population clustersApplying grid methods
Niek van LeeuwenStatistics Netherlands
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Presentation
Occasion
Methods
Population cluster map
Grid methods
Results
Further research
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Occasion
EU Census 2001, population cluster map, based on land use map 2000, production 2005
Land use map 2003 published in 2006
More recent statistics on population clusters
![Page 4: Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands nlwe@cbs.nl.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649f225503460f94c3a80a/html5/thumbnails/4.jpg)
Two methods
- Polygons
network of paved roads and address points
- Grid method
delineating by grids only
Occasion
![Page 5: Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands nlwe@cbs.nl.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649f225503460f94c3a80a/html5/thumbnails/5.jpg)
Methods
comparing polygon and grid methods: data 2001
polygon: - population cluster map
grid: - number of dwellings per grid cell- proximity factor
calibration set: - Combination of polygons and grid cells with totalized number of dwellings and proximity factors per cell.
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Methodspopulation cluster map (1)
- morphological delineated area- mainly groups of residential houses- recognizable street pattern (no ribbon development)
- form one cluster when: - separated < 200m
separated > 200m but connected by bridge
- minimum number of dwellings
![Page 7: Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands nlwe@cbs.nl.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649f225503460f94c3a80a/html5/thumbnails/7.jpg)
Methodspopulation cluster map (2)
![Page 8: Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands nlwe@cbs.nl.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649f225503460f94c3a80a/html5/thumbnails/8.jpg)
MethodsGrid (1)
total number of dwellings per grid- dwellings from housing register with addresses- addresses provided with coordinates
proximity factor
- each cell calculated a proximity factor
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Results, grid6.76 million dwellings, 532 thousand grids (100m)
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Results, Calibration set Grid cells combined with residential areas (1)
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Results, Calibration set
Grid cells combined with residential areas (2)
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MethodsGrid (2) Proximity factor
N
Area
RCIRCLEingridfocalsumoutgrid
1
),,(
R = radius in number of cells
N = number of cells involved
100m x 100m grid cell
Radius R N
1000m 10 317
500m 5 81
200m 2 13
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Dwellingsproximity selection radius 1000m, threshold 200 dwellings / km2
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Dwellingsproximity selection radius 200m, threshold 400 dwellings / km2
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ResultsArea “Het Westland”, SW of The HagueDwellings per 100m grid
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ResultsArea “Het Westland”Proximity; radius 1000m, threshold 200 dwellings / km2
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ResultsArea “Het Westland”Proximity; radius 200m, threshold value 400 dwellings / km2
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River basin areaNear Gorinchemresidential and other areas in population cluster polygons
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River basin areaNear Gorinchemdwellings per 100m grid
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River basin areaNear Gorinchemproximity radius 1000m, threshold 200 dwellings / km2
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River basin area Near Gorinchemproximity radius 200m, threshold 400 dwellings / km2
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Concluding
- Delineating residential area by total number of dwellings is not sufficient
- Proximity is the measure
![Page 23: Delineating population clusters Applying grid methods Niek van Leeuwen Statistics Netherlands nlwe@cbs.nl.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649f225503460f94c3a80a/html5/thumbnails/23.jpg)
Future research
Grid method- calibration: effects of selection on number of residential areas and statistics.- Adding non dwelling addresses
Vector method
- delineating residential areas from National road file and address points
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Thank you for your attention