Brings H3 - Hexagonal hierarchical geospatial indexing system support to Apache Spark SQL
Fetch the JAR file from Maven.
libraryDependencies += "io.github.nuzigor" %% "h3-spark" % "0.9.1"
h3-spark supports only Spark 3.2.1+.
Register h3 functions with these commands:
com.nuzigor.spark.sql.h3.registerFunctions
Config your spark applications with spark.sql.extensions option: spark.sql.extensions=com.nuzigor.spark.sql.h3.H3SqlExtensions
For example, to use in pure Spark SQL environment:
spark-sql --packages io.github.nuzigor:h3-spark_2.12:0.9.1 --conf spark.sql.extensions=com.nuzigor.spark.sql.h3.H3SqlExtensions
| Spark function | Corresponding h3 function |
|---|---|
| h3_from_latlng | latLngToCell |
| h3_from_wkt | latLngToCell |
| h3_array_from_wkt | latLngToCell, polygonToCells, gridPathCells |
| h3_grid_disk | gridDisk |
| h3_grid_ring | gridRingUnsafe |
| h3_grid_path | gridPathCells |
| h3_grid_distance | gridDistance |
| h3_get_resolution | getResolution |
| h3_is_valid | isValidCell |
| h3_to_parent | cellToParent |
| h3_to_children | cellToChildren |
| h3_to_center_child | cellToCenterChild |
| h3_compact | compactCells |
| h3_uncompact | uncompactCells |
| h3_are_neighbors | areNeighborCells |
| h3_cell_area_km2 | cellArea |
| h3_cell_area_m2 | cellArea |
| h3_cell_area_rads2 | cellArea |
| h3_distance_km | greatCircleDistance |
| h3_distance_m | greatCircleDistance |
| h3_distance_rads | greatCircleDistance |
| h3_is_pentagon | isPentagon |
| h3_grid_disk_distances | gridDiskDistances |
- getBaseCellNumber
- stringToH3
- h3ToString
- isResClassIII
- getIcosahedronFaces
- cellToLatLng
- cellToBoundary
- gridDiskUnsafe
- gridDiskDistancesUnsafe
- gridDiskDistancesSafe
- gridDisksUnsafe
- cellToLocalIj
- localIjToCell
- cellToChildPos
- childPosToCell
- cellsToLinkedMultiPolygon
- cellsToMultiPolygon
- cellsToDirectedEdge
- isValidDirectedEdge
- getDirectedEdgeOrigin
- getDirectedEdgeDestination
- directedEdgeToCells
- originToDirectedEdges
- directedEdgeToBoundary
- cellToVertex
- cellToVertexes
- vertexToLatLng
- isValidVertex
- getHexagonAreaAvg
- getHexagonEdgeLengthAvg
- edgeLength
- getNumCells
- getRes0Cells
- getPentagons
