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boundaries/dissemination_blocks.sql

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+/*
+Dissemination Blocks
+*/
+
+/* 2021
+Definition here: https://web.archive.org/web/20250212081621/https://www12.statcan.gc.ca/census-recensement/2021/ref/dict/az/definition-eng.cfm?ID=geo014
+*/
+
+DROP TABLE IF EXISTS silver.db_2021;
+CREATE TABLE silver.db_2021 AS
+SELECT DISTINCT
+    csd.country_dguid,
+    csd.country_en_name,
+    csd.country_fr_name,
+    csd.country_en_abbreviation,
+    csd.country_fr_abbreviation,
+    csd.grc_dguid,
+    csd.grc_en_name,
+    csd.grc_fr_name,
+    csd.pr_dguid,
+    csd.pr_en_name,
+    csd.pr_fr_name,
+    csd.pr_en_abbreviation,
+    csd.pr_fr_abbreviation,
+    csd.pr_iso_code,
+    csd.car_dguid,
+    csd.car_en_name,
+    csd.car_fr_name,
+    csd.er_dguid,
+    csd.er_name,
+    csd.cd_dguid,
+    csd.cd_name,
+    csd.cd_type,
+    csd.ccs_dguid,
+    csd.ccs_name,
+    csd.cma_dguid,
+    csd.cma_p_dguid,
+    csd.cma_name,
+    csd.cma_type,
+    csd.csd_dguid,
+    csd.csd_name,
+    csd.csd_type,
+    csd.sac_type,
+    csd.sac_code,
+    dgr.fed_dguid,
+    fed.fed_name,
+    fed.fed_en_name,
+    fed.fed_fr_name,
+    dgr.ct_dguid,
+    dgr.ada_dguid,
+    dgr.da_dguid,
+    dgr.db_dguid,
+    db.geom
+FROM silver.dissemination_geographies_relationship_2021 AS dgr
+LEFT JOIN silver.csd_2021 AS csd
+    ON dgr.csd_dguid = csd.csd_dguid
+LEFT JOIN silver.fed_2021 AS fed
+    ON dgr.fed_dguid = fed.fed_dguid
+LEFT JOIN bronze.ldb_000a21a_e AS db
+    ON dgr.db_dguid = db.dguid;
+
+-- Make geometries valid
+UPDATE
+    silver.db_2021
+SET
+    geom = st_makevalid(geom)
+WHERE
+    st_isvalid(geom) = 'f';
+
+-- Create spatial index
+CREATE INDEX db_2021_geom_idx ON silver.db_2021 USING gist (geom) WITH (
+    fillfactor = 100
+);