duck_dggs

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Utility Functions ​

duck_dggs_version ​

Signature ​

sql
VARCHAR duck_dggs_version ()

Description ​

Returns the version string of the loaded duck_dggs extension together with the version of the bundled DGGRID library.

Example ​

sql
SELECT duck_dggs_version();
┌───────────────────────┐
│  duck_dggs_version()  │
│        varchar        │
├───────────────────────┤
│ f7dbd3d (DGGRID 8.44) │
└───────────────────────┘

dggs_params ​

See Grid Configuration for full details.

Signatures ​

sql
STRUCT dggs_params (projection VARCHAR, aperture INTEGER, topology VARCHAR,
                   azimuth_deg DOUBLE, pole_lat_deg DOUBLE, pole_lon_deg DOUBLE)

STRUCT dggs_params (projection VARCHAR, aperture INTEGER, topology VARCHAR,
                   azimuth_deg DOUBLE, pole_lat_deg DOUBLE, pole_lon_deg DOUBLE,
                   is_aperture_sequence BOOLEAN, aperture_sequence VARCHAR)

Description ​

Constructs a grid-configuration struct that can be passed as the optional last argument to any transform function.

Example ​

sql
SELECT dggs_params('ISEA', 4, 'HEXAGON', 0.0, 58.28252559, 11.25);