geohasher 0.1.4

Simple geohash encode/decode functions without any dependencies.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

### Geohasher
[![Crates.io](https://img.shields.io/crates/v/geohasher.svg)](https://crates.io/crates/geohasher)
[![Documentation](https://docs.rs/geohasher/badge.svg)](https://docs.rs/geohasher)
[![codecov](https://codecov.io/gh/conbrad/geohasher/graph/badge.svg?token=LNCFZRT18I)](https://codecov.io/gh/conbrad/geohasher)

Simple geohash encode/decode functions without any dependencies.


### Installation

`cargo install geohasher`


### Encoding

To encode a latitude and longitude into a geohash:

```rust
use geohasher::encode;

let geohash = encode(57.64911, 10.40744, 8);
assert_eq!(geohash, "u4pruydq");
```

### Decoding

To decode a geohash back into latitude and longitude:

```rust
use geohasher::decode;

let (lat, lng) = decode("u4pruydq");
assert!((lat - 57.64911).abs() < 0.001);
assert!((lng - 10.40744).abs() < 0.001);
```

### References:
According to [Wikipedia](https://en.wikipedia.org/wiki/Geohash):
> "Geohash is a public domain geocode system invented in 2008 by Gustavo Niemeyer[1] which encodes a geographic location into a short string of letters and digits. Similar ideas were introduced by G.M. Morton in 1966[2]."

1. https://web.archive.org/web/20080305223755/http://blog.labix.org/#post-85
2. https://web.archive.org/web/20190125020453/https://domino.research.ibm.com/library/cyberdig.nsf/papers/0DABF9473B9C86D48525779800566A39/$File/Morton1966.pdf