spb/qwhpi Public
QHPI — Quebec Housing Price Index: quality-adjusted, hierarchically pooled housing price indexes.
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1<!--2=============================================================================3QWHPI — Quebec Weekly Housing Price Index4Author : Simon-Pierre Boucher5Contact : contact@spboucher.ai6File : data/external/SDA_SOURCE.md7Purpose : Provenance record for the authoritative boundary dataset.8=============================================================================9-->1011# Boundary dataset provenance — SDA 1/20 0001213- **Dataset**: Découpages administratifs à l'échelle 1/20 000 (SDA)14- **Producer**: Gouvernement du Québec — Ministère des Ressources naturelles15 et des Forêts (MRNF), Registre du domaine de l'État16- **Catalog page**: https://www.donneesquebec.ca/recherche/dataset/decoupages-administratifs17- **File downloaded**: `SDA.gpkg.zip` (GPKG),18 https://diffusion.mern.gouv.qc.ca/diffusion/RGQ/Vectoriel/Theme/Local/SDA_20k/GPKG/SDA.gpkg.zip19- **Download date**: 2026-08-0620- **Version**: V2026-07 (layer attribute `*_CO_VER`)21- **Native CRS**: EPSG:4269 (NAD83 geographic); metric operations performed in22 EPSG:32198 (NAD83 / Quebec Lambert)23- **Layers used**:24 - `munic_s` — municipal polygons (geocode, name, MRC, administrative region)25 - `regio_s` — 17 administrative regions (map rendering)26 - `mrc_s` — MRCs (optional intermediate level)27- **License**: CC-BY 4.0 (Données Québec)2829Join result persisted at `data/processed/geo_join.parquet`30(one row per transaction id; join_method ∈ {within, nearest<=1km, unassigned}).31Validation: 100.000% `within`, 99.92% name agreement with the raw `city` field32(see `outputs/reports/geography_report.md`).33