Docs · floor keys
What the substrate refuses to hallucinate around.
Floor keys are non-nullable boolean columns on every cube row that document structural gaps the architecture cannot paper over. A locality model without explicit, named uncertainty primitives appears more precise than it is — Bharat Strata names what it cannot know.
Doctrine-v1 keys
10
frozen registry (10)
MH-36 closure keys
5
sprint-6 extensions
Total active
15
surfaced on cube rows
Every cube row
✓
floor_cols non-nullable
§1 Doctrine-pinned registry (10)
These are the ten floor keys named in the technical deep-dive §6.6. Every cube row carries them; the falsifier gate cube_v0_5_schema.floor_cols_present + floor_cols_nonnullableblocks publish if any are missing or nullable.
| Registry | Key | Fires on | When it fires | Evidence |
|---|---|---|---|---|
| doctrine v1 | floor_ghsl_pop_absent_in_pristine | every cell | Cube rows where GHSL population is not present in the pristine S3 zone. | Cube schema column `floor_ghsl_pop_absent_in_pristine` (non-nullable boolean) |
| doctrine v1 | floor_pyproj_vertical_grid_unavailable_in_pristine | every cell | Vertical datum grid (PROJ) unavailable in pristine; vertical accuracy ≤ EGM2008−EGM96 sub-metre. | Cube schema column · resolved empirically by R18 |
| doctrine v1 | floor_dem_datum_resolved_empirically_egm2008_minus_egm96_subm | every cell | EGM2008 − EGM96 datum offset resolved empirically at sub-metre level rather than from a vertical grid. | R18 NASADEM cross-DEM closure (`r18_nasadem_cross_dem_v1`) |
| doctrine v1 | floor_nrsc_250k_lgd_namexwalk_widened_v0_4_10 | every cell | NRSC 250k → LGD name crosswalk widened in v0.4.10 to absorb upstream name drift. | s0_10_dem_pop_namexwalk artefact in `bharata_strata/v0.4.10-e-dem-pop-namexwalk/` |
| doctrine v1 | floor_sar_raster_absent_pristine_stac_pins_only | every cell | Sentinel-1 SAR raster not in pristine zone; only STAC pins are available. | Tier-F overlay `_audit.json` |
| doctrine v1 | floor_sentinel2_nir_pristine_does_not_intersect_mmr5 | when witness absent | Sentinel-2 NIR pristine tiles do not intersect MMR-5 footprint; cells must fall back to Tier-G HLS. | R4 canonical NDVI closure · `r4_ndvi_canonical_v1` |
| doctrine v1 | floor_osm_india_buildings_materially_undermapped_vs_overture | when witness absent | OSM India buildings are materially undermapped vs Overture v2; the road_length column inherits the same caveat at low-density admins. | Overture v2 by_district parquet · sprint-6 mh36-roads-rollup-v1 |
| doctrine v1 | floor_nrsc_250k_ne_frontier_class_drift_floor_lgd | admin subset | NRSC 250k landcover exhibits class drift at North-East frontier LGDs. | Tier-L worldcover overlay closure |
| doctrine v1 | floor_adm2_boundary_temporal_drift_lgd_member | every cell | Adm2 boundaries drift temporally at LGD-member granularity; cluster admin assignment uses a frozen 2021 snapshot. | geoBoundaries IND-ADM2-2021 fingerprint |
| doctrine v1 | floor_bhuvan_routing_witness_is_inter_city_not_road_network | every cell | Bhuvan routing API returns inter-city OD pairs, not a full road network; cannot be aggregated to cluster grain. | Bhuvan routing overlay `_audit.json` |
§2 MH-36 closure-issued keys
Keys named (and in some cases CLOSED) during the sprint-6 MH-36 fan-out. The MH-36 sub-set are the keys this site’s API surfaces alongside cell records — see the floor_keysarray in any /api/v1/cells/{key} response.
| Registry | Key | Fires on | When it fires | Evidence |
|---|---|---|---|---|
| MH-36 closure | floor_microsoft_v3_polygon_centroid_used_no_per_polygon_admin_pip | admin subset | MS GlobalML v3 polygons used polygon-centroid PIP at admin level. CLOSED 2026-06-02 by `ms_quadkey_prepartition_mh36` v1.0.1 (true per-polygon LGD PIP via STRtree). | sprint-6/_closure/ms_quadkey_prepartition_mh36_closure_2026-06-02.json |
| MH-36 closure | floor_ms_india_upstream_tile_gap_admins_471_475_zero | admin subset | Bhandara (471) + Gadchiroli (475) had zero MS-India polygons due to an upstream tile gap. Filled with Google Open Buildings v3 substitute (1.09 M polys; provenance column `source = gob_v3_substitute`). | sprint-6/_closure/ms_quadkey_prepartition_mh36_closure_addendum_gob_v3_substitute_2026-06-02.json |
| MH-36 closure | floor_r21_maharashtra_zero_obs_in_w19_to_w22_window | admin subset | WRIS groundwater had 0 MH rows in the W19–W22 window when filtered by upstream `state` string. CLOSED 2026-06-02 by `tier_s_wris_groundwater_overlay_v1` v1.0.25 (bbox+PIP, never `state` string). | sprint-6/_closure/wris_gw_mh36_bbox_pip_closure_2026-06-02.json |
| MH-36 closure | floor_worldcover_lulc_unknown | when witness absent | ESA WorldCover v200 returned class 0 (nodata) for the cluster — typically off-grid coastal pixels. | Tier-L overlay closure · R22 cross-witness gate |
| MH-36 closure | floor_morphology_witness_absent | when witness absent | A specific morphology column has a null value on the cell (its sibling has_*_primary flag is FALSE). The R24 twin index z-scores nulls to 0, contributing 0 to the cosine numerator. | R23 morphology vector publish-gate audit · `falsifier_4_mw_43` |
Sample floor-key chips
FKfloor_ghsl_pop_absent_in_pristineFKfloor_pyproj_vertical_grid_unavailable_in_pristineFKfloor_dem_datum_resolved_empirically_egm2008_minus_egm96_submFKfloor_nrsc_250k_lgd_namexwalk_widened_v0_4_10FKfloor_sar_raster_absent_pristine_stac_pins_onlyFKS2 NIR pristine gapFKOSM-India roads under-mappedFKfloor_nrsc_250k_ne_frontier_class_drift_floor_lgdFKfloor_adm2_boundary_temporal_drift_lgd_memberFKfloor_bhuvan_routing_witness_is_inter_city_not_road_networkFKfloor_microsoft_v3_polygon_centroid_used_no_per_polygon_admin_pipFKMS-India tile gap (471/475)FKWRIS-GW MH window emptyFKWorldCover class unknownFKMorphology witness absent
The Explorer, the Compare tab, and the Score top hits all render these chips inline on cells where the key fires. Floor keys are data, not annotation.