1. Discussion: Data Protection Call for a European Guideline on Thresholds (Rules of Confidentiality / Disclosure Control / Number Suppression / …) Ingrid Kaminger Kartographie und GIS STATISTIK AUSTRIA Guglgasse 13 1110 Wien Tel : ++43 / 1-71128-7773 Fax : ++43 / 1-71128-7053 E-mail : Ingrid.Kaminger@statistik.gv.at

2. Data Protection necessary to avoid misuse fundamental right of each person regulation, law -> Aim: common guideline to allow cross border projects

3. Various Solutions (1) Manipulating data (Sweden) Just classes – no numbers (Switzerland) Suppressing numbers (Austria, Denmark, Finnland, Norway, Slovenia) -> Problem: numbers do not sum up to actual totals

4. Austria and Slovenia

5. Various Solutions (2) Aggregation with neighbouring cells Hierarchical Aggregation Individual Clustering Spatial Disaggregation -> Sums are correct, but loss in detail

6. Hierarchical Aggregation

7. Current Thresholds 2006

8. Thank you for your Contributions now Contributions later Attention