add DuckDB script for downloading monaco or a custom area from Overture as Parquet file [#541]

Author: bdon

tiles/download-overture.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REL="${1:-2026-02-18.0}"
+BBOX="${2:-7.408446,43.722901,7.4405,43.752481}"
+OUT="data/sources/${3:-monaco.parquet}"
+
+IFS=',' read -r XMIN YMIN XMAX YMAX <<< "$BBOX"
+
+echo "Downloading release $REL: $BBOX to $OUT"
+
+duckdb -c "
+COPY (
+  SELECT *
+  FROM read_parquet(
+    's3://overturemaps-us-west-2/release/${REL}/**/*.parquet',
+    hive_partitioning=1, filename=1, union_by_name=1
+  )
+  WHERE theme IN ('transportation','places','base','buildings','divisions')
+    AND bbox.xmin <= ${XMAX}
+    AND bbox.xmax >= ${XMIN}
+    AND bbox.ymin <= ${YMAX}
+    AND bbox.ymax >= ${YMIN}
+) TO '${OUT}' (FORMAT PARQUET);"
+
+echo "Wrote ${OUT}"