A static library used for encoding/decoding geohashes.
To use libgeohash just run make. Link libgeohash.a and include geohash.h into your project.
char* geohash_encode(double lat, double lng, int precision);
Takes in latitude and longitude with a desired precision and returns the correct hash value. If precision < 0 or precision > 20, a default value of 6 will be used.
GeoCoord geohash_decode(char* hash);
Produces an allocated GeoCoord structure which contains the latitude and longitude that was decoded from the geohash. A GeoCoord also provides the bounding box for the geohash (north, east, south, west).
char** geohash_neighbors(char* hash);
Uses the bounding box declared at hash and calculates the 8 neighboring boxes. An example is show below.
- ezefx ezs48 ezs49
- ezefr ezs42 ezs43
- ezefp ezs40 ezs41
The value returned is an array of char* with length of 8. The neighboring positions of values are shown below with each box representing the index of the array.
- 7 0 1
- 6 * 2
- 5 4 3
