Table of Contents

Miscellaneous H3 functions

These functions include descriptions of the H3 grid system.

degsToRads

double degsToRads(double degrees);

Converts degrees to radians.

radsToDegs

double radsToDegs(double radians);

Converts radians to degrees.

hexAreaKm2

double hexAreaKm2(int res);

Average hexagon area in square kilometers at the given resolution.

hexAreaM2

double hexAreaM2(int res);

Average hexagon area in square meters at the given resolution.

edgeLengthKm

double edgeLengthKm(int res);

Average hexagon edge length in kilometers at the given resolution.

edgeLengthM

double edgeLengthM(int res);

Average hexagon edge length in meters at the given resolution.

numHexagons

int64_t numHexagons(int res);

Number of unique H3 indexes at the given resolution.

getRes0Indexes

void getRes0Indexes(H3Index *out);

All the resolution 0 H3 indexes. out must be an array of at least size res0IndexCount().

res0IndexCount

int res0IndexCount();

Number of resolution 0 H3 indexes.

getPentagonIndexes

void getPentagonIndexes(int res, H3Index *out);

All the pentagon H3 indexes at the specified resolution. out must be an array of at least size pentagonIndexCount().

pentagonIndexCount

int pentagonIndexCount();

Number of pentagon H3 indexes per resolution. This is always 12, but provided as a convenience.