1. 5-7 October 2009EFGS Workshop, The Hague, Netherlands1 Geo-statistics and Scales Mathieu Vliegen

2. Outline Referencing statistical output and scales in small area statistics Referencing statistical output and scales in small area statistics Comparison of scales: differentiation analysis Comparison of scales: differentiation analysis Results of analysis for the 3 biggest cities in the Netherlands Results of analysis for the 3 biggest cities in the Netherlands What does the analysis tell us? What does the analysis tell us? 5-7 October 2009EFGS Workshop, The Hague, Netherlands2

3. Referencing and scales Referencing Regional Spatial Geometrical Scales Postal areas Sub-city areas Grid squares 5-7 October 2009EFGS Workshop, The Hague, Netherlands3

4. Differentiation analysis Range analysis: difference between highest and lowest scale value Range analysis: difference between highest and lowest scale value Homogeneity analysis: variation coefficient = standardized standard deviation of the scale value distribution (standard deviation / value of the relevant territorial unit ) Homogeneity analysis: variation coefficient = standardized standard deviation of the scale value distribution (standard deviation / value of the relevant territorial unit ) 5-7 October 2009EFGS Workshop, The Hague, Netherlands4

5. Scales used in the analysis Postal areas Postal areas Sub-city areas Sub-city areas Grid squares Grid squares 4-digit (e.gr. 2203) 5-digit (e.gr. 2203H) Districts Neighbourhoods 500 x 500 m 100 x 100 m 5-7 October 2009EFGS Workshop, The Hague, Netherlands5

6. Variables analysed Population aged 65 and over (%) Population aged 65 and over (%) Population with non-western foreign background (%) Population with non-western foreign background (%) One-person household (%) One-person household (%) Private housing (% dwellings) Private housing (% dwellings) Average ratable value dwellings Average ratable value dwellings 5-7 October 2009EFGS Workshop, The Hague, Netherlands6

7. Key figures: Population 5-7 October 2009EFGS Workshop, The Hague, Netherlands7 Total65 yearsNon- Populationand olderwestern x 1000% Amsterdam728,511,334,6 Rotterdam566,714,636,0 The Hague469,513,432,8

8. Key figures: Households 5-7 October 2009EFGS Workshop, The Hague, Netherlands8 Total One- House- person holds households x 1000% Amsterdam401,255,3 Rotterdam283,946,9 The Hague234,348,1

9. Key figures: Housing 5-7 October 2009EFGS Workshop, The Hague, Netherlands9 Total Private Ratable dwellings housing value x 1000% 1.000 Amsterdam387.520.6230.6 Rotterdam293.329.6152.2 The Hague235.843.8197.1

10. Number of small areal units 5-7 October 2009EFGS Workshop, The Hague, Netherlands10 Amsterdam Rotterdam The Hague Postal areas 4-digit817361 Postal areas 5-digit1085994825 Sub-city districts151844 Sub-city neigbourhoods9685111 Grid squares 500x500 m569516308 Grid squares 100x100 m679064764810

11. Small areal units: average population 5-7 October 2009EFGS Workshop, The Hague, Netherlands11 Amsterdam Rotterdam The Hague Postal areas 4-digit8 9947 7627 696 Postal areas 5-digit671570569 Sub-city districts48 56431 48110 670 Sub-city neigbourhoods7 5886 6674 229 Grid squares 500x500 m1 2821 0961 519 Grid squares 100x100 m1078898

12. Amsterdam: Variation coefficients 5-7 October 2009EFGS Workshop, The Hague, Netherlands12 PopulationOne-Housing 65 yearsNon-personPrivateRatable or olderwesternhouseholdhousingvalue Sub-city districts0.340.470.160.200.23 Postal areas 4-digit0.61 0.300.940.44 Sub-city neigbourhoods0.54 0.240.910.47 Grid squares 500x500 m1.250.670.401.420.76 Postal areas 5-digit1.020.660.271.010.55 Grid squares 100x100 m1.490.750.431.580.91

13. Rotterdam: Variation coefficients 5-7 October 2009EFGS Workshop, The Hague, Netherlands13 Population One-Housing 65 yearsNon-personPrivateRatable or olderwesternhouseholdhousingvalue Sub-city districts0.370.490.310.550.25 Postal areas 4-digit0.570.600.290.610.42 Sub-city neigbourhoods0.540.600.320.680.47 Grid squares 500x500 m1.140.600.441.021.73 Postal areas 5-digit0.910.690.360.870.66 Grid squares 100x100 m1.400.710.531.231.39

14. The Hague: Variation coefficients 5-7 October 2009EFGS Workshop, The Hague, Netherlands14 Population One-Housing 65 yearsNon- personPrivateRatable or olderwestern householdhousingvalue Sub-city districts0.710.650.320.480.72 Postal areas 4-digit0.590.690.270.470.58 Sub-city neigbourhoods0.950.700.340.570.72 Grid squares 500x500 m1.040.640.390.620.99 Postal areas 5-digit1.080.790.310.640.71 Grid squares 100x100 m1.440.770.510.811.92

15. What does the analysis tell us? Awareness of the implications of the areal scale with respect to the statistics produced at that scale (how to lie with statistics?) Awareness of the implications of the areal scale with respect to the statistics produced at that scale (how to lie with statistics?) Definition as detailed as possible of the area scale used in order to protect users for possible pitfalls using the statistics in question Definition as detailed as possible of the area scale used in order to protect users for possible pitfalls using the statistics in question 5-7 October 2009EFGS Workshop, The Hague, Netherlands15