Geography Functions
This section provides reference information for the geography functions in PlaidCloud Lakehouse. These functions are based on the very innovate H3 system developed by Uber to better calculate geographic relationships. The explanation of H3 can be found here.
Coordinate Conversion
Hexagon Properties
- H3_CELL_AREA_M2
- H3_CELL_AREA_RADS2
- H3_HEX_AREA_KM2
- H3_HEX_AREA_M2
- H3_GET_BASE_CELL
- H3_GET_FACES
- H3_GET_RESOLUTION
- H3_TO_CENTER_CHILD
- H3_TO_CHILDREN
- H3_TO_GEO_BOUNDARY
- H3_TO_PARENT
- H3_NUM_HEXAGONS
Hexagon Relationships
- H3_HEX_RING
- H3_K_RING
- H3_INDEXES_ARE_NEIGHBORS
- H3_IS_PENTAGON
- H3_IS_RES_CLASS_III
- H3_IS_VALID
- H3_GET_DESTINATION_INDEX_FROM_UNIDIRECTIONAL_EDGE
- H3_GET_INDEXES_FROM_UNIDIRECTIONAL_EDGE
- H3_GET_ORIGIN_INDEX_FROM_UNIDIRECTIONAL_EDGE
- H3_GET_UNIDIRECTIONAL_EDGE_BOUNDARY
- H3_GET_UNIDIRECTIONAL_EDGE
- H3_GET_UNIDIRECTIONAL_EDGES_FROM_HEXAGON
- H3_UNIDIRECTIONAL_EDGE_IS_VALID
Measurement
- H3_DISTANCE
- H3_EDGE_ANGLE
- H3_EDGE_LENGTH_KM
- H3_EDGE_LENGTH_M
- H3_EXACT_EDGE_LENGTH_KM
- H3_EXACT_EDGE_LENGTH_M
- H3_EXACT_EDGE_LENGTH_RADS
General Utility
Last modified April 01, 2024 at 11:19 AM EST: wip (1bb56e9)