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Andras Schmelczer 2026-07-12 15:03:33 +01:00
parent 982e0cc89c
commit cfaf58dfba
44 changed files with 793 additions and 201 deletions
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4
pipeline/transform/join_price_estimates.py
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@ -2,7 +2,7 @@
Price estimation runs on ``price_inputs.parquet`` (built by ``property_base``
straight from epc_pp + arcgis, independently of merge's area features) and emits
``price_estimates.parquet`` — the natural key (Postcode + coalesced address) plus
``price_estimates.parquet``: the natural key (Postcode + coalesced address) plus
``Estimated current price`` / ``Est. price per sqm``. This step joins those two
columns onto properties.parquet to produce the file the server consumes.
@ -10,7 +10,7 @@ Why the natural key
-------------------
Estimates and properties are built by separate runs, so a positional row index
would not line up. Instead both derive the key ``(Postcode, coalesce(register
address, EPC address))`` — which is unique and non-null on the deduped dwelling
address, EPC address))``, which is unique and non-null on the deduped dwelling
universe (see ``property_base._dedupe_collapsed_properties``) and identical on
both sides because both start from that same universe. So estimates map onto
properties 1:1 regardless of row order.