1. Analysis of demographical and economical statistical data on the basis of a trans-national hierarchical grid
Igor Kuzma
Statistical Office of the Republic of Slovenia
Ingrid Kaminger
STATISTIK AUSTRIA

2. Hierarchical grid at STATISTIK AUSTRIA
Main Projection system for statistical data on a hierarchical grid :
Lambert Conformal Conic
Seven different levels of grid cells –
10km, 5km, 2.5km, 1km, 500m, 250m, 125m
Available data: Census 2001 (population, buildings, dwellings,
employment
Data protection threshold:
All grids: absolute numbers are shown without restraint
Grids 250m to 10km: more detailed data only if
population > 30
houses, dwellings >3

3. Hierarchical grid at the Statistical Office of
the Republic of Slovenia
Tendency to analyze and present statistical data on a hierarchical grid
Six different size levels of grid cells –
10km, 5km, 1km, 500m, 250m, 100m
Available population and economical statistical data
The data protection threshold for presenting data on any level of a grid is 51 (committee for data protection)

4. Cooperation with Statistik Austria
Spatial statistical data from the Census 2001 (Population, Buildings, Dwellings, Employment) are already available to their customers on different levels of a grid
Similar general attitude towards the data protection
The Slovene initiative for the project: Exchange of the data in the Region (Austria, Hungary, Croatia, Italy, Slovenia)
Trans-boundary data analysis:
Creation of a hierarchical grid (UTM projection, Zone 33, fixed point: 15°E, 5100km north of Equator)
Harmonization of statistical data

7. Territorial Divisions
Administrative Units
unequal shapes
unequal sizes
Misinterpretation of data
Grids
regularly divisible
equal size
adaptable to the scale of the map
"neutral" territorial division
EUROSTAT DEFINITION:
Densely populated area: contiguous set of local areas, each of which has a density >500 I/km² and where the total population for the set is at least inhabitants.
Intermediate area: contiguous set of local areas, not belonging to the densely populated area, each of which has a density >100 I/km², and either with a total population for the set of at least inhabitants or adjacent to a densely populated area.
Thinly populated area: contiguous set of local areas, neither belonging to a densely populated area nor to an intermediate area.
--> Suggestion for the definition of densely populated areas on the basis of grids

8. Definition of densely populated areas based on LAU2 Units

9. Definition of densely populated areas based on 2.5km Grids

10. 5% > young 5-10% mature 10-20% old 20% < very old
Austria, Slovenia – Proportion of population above 65 (%), 2001, 2002
5% > young
5-10% mature
10-20% old
20% < very old

11. Austria, Slovenia – Total age dependency ratio (%), 2001, 2002

12. Austria, Slovenia – Sectoral employment, 2001

13. SLOVENIA: data protection
Table1: % of suppressed data considering the data protection threshold 3 and 51

14. SLOVENIA: data protection
6,935 km2

15. SLOVENIA: data protection

16. SLOVENIA: data protection
0,051km2

17. SLOVENIA: data protection

18. Conclusions An example for other similar projects among MS
A good starting point for the “Exchange of the data in the Region” project
Groundwork for future cooperation:
Education
Nationality
Higher accuracy (smaller grid, lower data protection threshold)
Employees (sex)
Education (sex)
500 m grid for border regions

19. Thank you for your attention!