Zensus 2022 protects published figures with the Cell-Key method, which perturbs each published figure independently. The method paper advises explicitly against "eigenständige Summenbildung aus überlagerten Fallzahlen statt auf das bereitgestellte überlagerte Insgesamt direkt zuzugreifen" — deriving a total by summing perturbed categories instead of reading the published total.
The conversion prepared for #1374 does exactly that for HEIZTYP: it sums the six categories and discards the supplied Insgesamt_Heizungsart. Measured over 2,628,942 cells, the two differ in 45.4 % of cells and by 1.11 % in aggregate.
This is not a defect. For the ratio computed in district_heating_areas, numerator and denominator then come from one consistent set, which is arguably better than mixing a category with a separately perturbed marginal. But it is a conscious deviation from the data provider's guidance, and it should be revisited deliberately rather than by omission.
It touches the pre-processing chain, so it pairs naturally with the heating energy carrier work.
Refs #1240, #1374.
Zensus 2022 protects published figures with the Cell-Key method, which perturbs each published figure independently. The method paper advises explicitly against "eigenständige Summenbildung aus überlagerten Fallzahlen statt auf das bereitgestellte überlagerte Insgesamt direkt zuzugreifen" — deriving a total by summing perturbed categories instead of reading the published total.
The conversion prepared for #1374 does exactly that for
HEIZTYP: it sums the six categories and discards the suppliedInsgesamt_Heizungsart. Measured over 2,628,942 cells, the two differ in 45.4 % of cells and by 1.11 % in aggregate.This is not a defect. For the ratio computed in
district_heating_areas, numerator and denominator then come from one consistent set, which is arguably better than mixing a category with a separately perturbed marginal. But it is a conscious deviation from the data provider's guidance, and it should be revisited deliberately rather than by omission.It touches the pre-processing chain, so it pairs naturally with the heating energy carrier work.
Refs #1240, #1374.