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school_compare/pipeline/transform/models/marts/dim_location.sql
Tudor 54df58746e
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feat(pipeline): use GIAS easting/northing for all geocoding, drop postcode step
GIAS grid references are the actual school location — far more accurate
than postcode centroids. Remove geocode_postcodes.py from the daily DAG
and the postcode-not-null filter from dim_location.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-26 21:18:59 +00:00

25 lines
746 B
SQL

-- Mart: School location dimension — one row per URN, PostGIS-enabled
-- Geometry derived from GIAS easting/northing (British National Grid → WGS84).
-- For schools missing easting/northing, the geocode script backfills via Postcodes.io.
select
s.urn,
s.address_line1,
s.address_line2,
s.town,
s.county,
s.postcode,
s.local_authority_code,
s.local_authority_name,
s.parliamentary_constituency,
s.urban_rural,
s.easting,
s.northing,
case
when s.easting is not null and s.northing is not null
then ST_Transform(ST_SetSRID(ST_MakePoint(s.easting, s.northing), 27700), 4326)
else null
end as geom
from {{ ref('stg_gias_establishments') }} s
where s.status = 'Open'