Report from the TWG Statistical Units (SU) and Population Distribution – Demography (PD)

1INSPIRE Conference, Edinburgh 1

Report from the TWG

Statistical Units (SU)

and

Population Distribution – Demography (PD)

Edinburgh June 30th, 2011 by Udo Maack


Theme Statistical Units andTheme Statistical Units andPopulation Distribution - DemographyPopulation Distribution - Demography

Bring together the two worlds:

The one of Geographers and the one of Statisticians

• Geographers use maps

• Statisticians use numerical values

to describe the world or part of them.

Two Views:

A statistical value is an attribute of a region (SU)

A related region is an attribute of a statistical value (PD)


Theme Statistical Units andTheme Statistical Units andPopulation Distribution / DemographyPopulation Distribution / Demography

Models / concepts behind:-Maps with Statistical Units

- Fields of a table or

- Multidimensional data cubes

Sex[male, female]

Year of observation

Age[0-100]

Region[NUTS]

“2025”Popolation count



Multidimensional data cubes are the base of the concept of the SDMX Standard(Statistical Data and Metadata eXchange – ISO /TS 17 369)

Pittfalls linking statistical and geographical data by InspireID:

- Responsibility split between (N)SI and (N) MA- Different licensee policies- Coordination of creation of identifiers- Inspire ID’s are to complex



Main achievements SU:



SU Grid package:DS of Geographical Grids (Annex I) did not achive the requirements. Main concerns:

- Grid size limited to 10n meter(125m, 200m, 250m and 500m required)

-Rules for construction of the Grid-ID do not allow coding of intermediate values.

New rules for Statistical Grids: – Limitation suspended and more – Rules for coding the ID of each grid size

allowing the EPSG-Code for coding the CRS



SU Vector package:

The feature type VectorStatisticalUnit – Generic model– using the GM_object with some constraints

(=> Area, Line and Point SU are allowed)

– Allows to define hierarchal dependencies– Allows tessellations as topological constrains– Evolutions of statistical units can be described

! Feature type NUTS defined in AU (Annex I) are not compatible



Main achievements PD:Class Population Distribution – Demography (I)

<<feature type >>StatisticalDataDistribution

+inspireID (???)+ domain+ universe+ measure+ classification+ measurementUnit+ statisticalMeasurementMethod+ period of Measurement+ period of Reference+ period of Validity:+ values: StatisticalDataValue Voidable lifecycle



Main achievements PD:Class Population Distribution – Demography (II)

<<data type >>Statistical Data Value

+ value +specialValue+flag+comment+dimensions:StatisticalDataDimensions Voidable +periodOfMeasurement

<<data type >>Statistical Data Dimensions

+ classifications [0..n]+ geoReference



Open issues (general):-Inspire metadata concept not flexible enough to allow the integration of searching in statistical databases to provide user defined statistical data?- SDMX and INSPIRE relation?- Which data have to be provided?



Open issues (reviewers and testers):- Is the information of the Evolution class sufficient for updating linked user own data?

- Specification Document and provided GML not aligned!!


?Thank you

Report from the TWG Statistical Units (SU) and Population Distribution – Demography (PD)

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