
Basic settlement units (Základní sídelní jednotky) (Czechia, 2026)
Basic settlement units (Základní sídelní jednotky) of the Czechia, 2026. Sub-municipal statistical unit (RÚIAN layer 6, ZakladniSidelniJednotka), the finest census grain: SLDB 2021 publishes population and dwellings for 23,583 ZSJ (ČSÚ codelist 47, CISZSJ) whose codes equal RÚIAN kod once ČSÚ's 6-digit zero-padding is stripped (23,583 of 23,604 match by code AND name; the 21 extra boundary units post-date the census). Declared 2026-09-15. Layer advertises maxRecordCount 1,000,000 but every query is transfer-capped at 2,000 features (exceededTransferLimit) at ~27 MB/page → 12 source_parts (offsets 0…22000) merged; ~320 MB of GeoJSON → GeoParquet interchange + 0.00005° simplify (block-size tier). kod RÚIAN integer → string (1…6 digits, e.g. 19 Abertamy, 195898 Obůrky-Paseky) — a recipe joining ČSÚ data must strip the padding, disclosed here. Dropped: katastralniuzemi (parent), charakterzsjkod (classification), vymera (derived area), dates, transaction ids. Driver skips inspection on the parquet path — run the 5-view GeoParquet recipe manually pre-publish and stamp inspection.simplified.
23,604 features