With some recent commits to GDAL master branch, you can now do some amazing
DuckDB queries in GDAL!
For example, h3 level 6 indexing for POIs in NH from Overture Maps
ogr2ogr -f parquet POI_NH_H3.parquet -nlt POINT -a_srs epsg:4326 -oo
ADBC_DRIVER=libduckdb -oo PRELUDE_STATEMENTS="LOAD SPATIAL" -oo
PRELUDE_STATEMENTS="load parquet" -oo PRELUDE_STATEMENTS="load httpfs" -oo
PRELUDE_STATEMENTS="load aws" -oo PRELUDE_STATEMENTS="install h3 from
community" -oo PRELUDE_STATEMENTS="load h3" -oo SQL="select h3_id,
ST_GeomFromText(h3_cell_to_boundary_wkt(h3_id)) geometry, count(*) POI_count
from (select id, h3_latlng_to_cell_string(st_y(geometry), st_x(geometry), 6) as
h3_id from
read_parquet('s3://overturemaps-us-west-2/release/2024-12-18.0/theme=places/type=place/*')
where addresses[1].region = 'NH' and addresses[1].country='US' and bbox.xmin
between -73 and -70 and bbox.ymin between 42 and 46) group by h3_id" ADBC:
15.60s user 2.36s system
48% cpu
36.935 total
This is using gdal-master from conda on my mac arm64.
https://imgur.com/a/zGp5Mwg
https://imgur.com/a/1H5JwwZ
--
Michael Smith
Remote Sensing/GIS Center
US Army Corps of Engineers
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