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Nick Rabinowitz
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May 20, 2024
Fork of H3 Tutorial: Intro to h3-js (v3)
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H3
H3 Tutorial: Intro to h3-js (v4)
Indexing Polygons With H3Cell counts per countryH3 Adaptive GridH3 Index Bit LayoutH3 Hierarchical (Non)ContainmentH3 Deck.gl Heat MapH3 Mapbox Style Heat MapIndexing OrderArea VariationH3 Continuous ElevationH3 Indexes: Cartesian vs SphericalShape simplification with H3H3 Index Inspector"Flat" H3 Grid via Gnomonic ProjectionH3 Radius LookupH3 Tutorial: Suitability AnalysisH3 Tutorial: Using Point LayersH3 Tutorial: Rendering HexagonsH3 Tutorial: Intro to h3-js (v3)H3 PathfindingSurface construction with H3
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H3 Tutorials
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// Index a lat/lng point to an H3 index
h3.latLngToCell(20, 123, 2)
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// Get the center of an H3 index as a lat/lng point
h3.cellToLatLng("8928342e20fffff")
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// Get the vertices of an H3 index as lat/lng points.
// Passing "true" as the second parameter yields GeoJSON lng/lat points and a closed loop.
h3.cellToBoundary("8928342e20fffff", true)
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// Get the children of an H3 index at the given (finer) resolution
h3.cellToChildren("8928342e20fffff", 10)
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// Get the parent of an H3 index at the given (coarser) resolution
h3.cellToParent("8928342e20fffff", 7)
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// Find all H3 indexes within a given distance from the origin (filled ring)
h3.gridDisk("8728342e2ffffff", 1)
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// Find all H3 indexes within a given distance from the origin, grouped into hollow rings
// from innermost to outermost
h3.gridDiskDistances("8728342e2ffffff", 3)
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// Get the distance in grid cells between two H3 indexes
h3.gridDistance("85283473fffffff", "8528362bfffffff")
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// Get a path of cells between two H3 indexes
h3.gridPathCells("85283473fffffff", "8528362bfffffff")
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// Get all H3 indexes within a geographic polygon. Inclusion is determined by whether the center
// of a given cell falls within the polygon.
h3.polygonToCells([[[37,-122], [36, -121], [36, -123]]], 5)
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// Get the multipolygon (array of polygons) for a set of H3 indexes. Indexes are expected to
// be unique and all at the same resolution
h3.cellsToMultiPolygon(["85291a6ffffffff", "85291a6bfffffff", "852834d3fffffff"])
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