https://github.com/lyokato/libgeohash

GeoHash C Library
https://github.com/lyokato/libgeohash

Last synced: 18 days ago
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GeoHash C Library

• Host: GitHub
• URL: https://github.com/lyokato/libgeohash
• Owner: lyokato
• License: mit
• Created: 2011-12-27T13:22:30.000Z (almost 13 years ago)
• Default Branch: master
• Last Pushed: 2020-04-22T08:49:34.000Z (over 4 years ago)
• Last Synced: 2024-07-31T22:56:19.518Z (3 months ago)
• Language: C
• Homepage:
• Size: 182 KB
• Stars: 32
• Watchers: 7
• Forks: 16
• Open Issues: 1
• Metadata Files:
  • Readme: README
  • License: LICENSE

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README

        
=======================================================================

 INSTALL

=======================================================================

 1. cd build

 2. cmake .. -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release

 parameters

    - BUILD_SHARED_LIBS (ON|OFF)

    - CMAKE_BUILD_TYPE (Debug|Release)

    - CMAKE_INSTALL_PREFIX (/usr/local)

3. make

4. make test

5. make install

Or just simply,

perl ./scripts/install

=======================================================================

 USAGE

=======================================================================

#include 

/* Get Hash */

char *hash;

hash = GEOHASH_encode(latitude, longitude, length);

...

free(hash);

/* Get Area by Hash */

GEOHASH_area *area;

area = GEOHASH_decode("dqcw5");

/* You can get the range of both latitude and longitude

area->latitude.max;

area->latitude.min;

area->longitude.max;

area->longitude.min;

*/

GEOHASH_free_area(area);

/* Get Adjacent Hash by Origin's Hash and Direction*/

char *adjacent_hash;

/* You can choose direction from GEOHASH_NORTH, GEOHASH_SOUTH, GEOHASH_EAST, and GEOHASH_WEST */

adjacent_hash = GEOHASH_get_adjacent("dqcw5", GEOHASH_NORTH);

...

free(adjacent_hash);

/* Get Neighbors' Hash by Origin's Hash */

GEOHASH *neighbors;

neighbors = GEOHASH_get_neighbors("dqcw5");

/* You can get hashes of each direction's neighbor

neighbors->north;

neighbors->north_east;

neighbors->north_west;

neighbors->south;

neighbors->south_east;

neighbors->south_west;

neighbors->east;

neighbors->west;

*/

GEOHASH_free_neighbors(neighbors);