pub fn encode(c: Coordinate<f64>, len: usize) -> Result<String, GeohashError> {
    let mut out = String::with_capacity(len);

    let mut bits_total: i8 = 0;
    let mut hash_value: usize = 0;
    let mut max_lat = 90f64;
    let mut min_lat = -90f64;
    let mut max_lon = 180f64;
    let mut min_lon = -180f64;

    if c.x < min_lon || c.x > max_lon || c.y < min_lat || c.y > max_lat {
        return Err(GeohashError::InvalidCoordinateRange(c));
    }

    while out.len() < len {
        for _ in 0..5 {
            if bits_total % 2 == 0 {
                let mid = (max_lon + min_lon) / 2f64;
                if c.x > mid {
                    hash_value = (hash_value << 1) + 1usize;
                    min_lon = mid;
                } else {
                    hash_value <<= 1;
                    max_lon = mid;
                }
            } else {
                let mid = (max_lat + min_lat) / 2f64;
                if c.y > mid {
                    hash_value = (hash_value << 1) + 1usize;
                    min_lat = mid;
                } else {
                    hash_value <<= 1;
                    max_lat = mid;
                }
            }
            bits_total += 1;
        }

        let code: char = BASE32_CODES[hash_value];
        out.push(code);
        hash_value = 0;
    }
    Ok(out)
}
/// Encode a coordinate to a geohash with length `len`.
///
/// ### Examples
///
/// Encoding a coordinate to a length five geohash:
///
/// ```rust
/// let coord = geohash::Coordinate { x: -120.6623, y: 35.3003 };
///
/// let geohash_string = geohash::encode(coord, 5).expect("Invalid coordinate");
///
/// assert_eq!(geohash_string, "9q60y");
/// ```
///
/// Encoding a coordinate to a length ten geohash:
///
/// ```rust
/// let coord = geohash::Coordinate { x: -120.6623, y: 35.3003 };
///
/// let geohash_string = geohash::encode(coord, 10).expect("Invalid coordinate");
///
/// assert_eq!(geohash_string, "9q60y60rhs");
/// ```
Encode a coordinate to a geohash with length `len`.
Encode a coordinate to a geohash with length ` len ` .
pub fn encode(c: Coordinate<f64>, len: usize) -> Result<String, GeohashError> {
    let mut out = String::with_capacity(len);
    let mut bits_total: i8 = 0;
    let mut hash_value: usize = 0;
    let mut max_lat = 90f64;
    let mut min_lat = -90f64;
    let mut max_lon = 180f64;
    let mut min_lon = -180f64;
    if c.x < min_lon || c.x > max_lon || c.y < min_lat || c.y > max_lat {
        return Err(GeohashError::InvalidCoordinateRange(c));
    }
    while out.len() < len {
        for _ in 0..5 {
            if bits_total % 2 == 0 {
                let mid = (max_lon + min_lon) / 2f64;
                if c.x > mid {
                    hash_value = (hash_value << 1) + 1usize;
                    min_lon = mid;
                } else {
                    hash_value <<= 1;
                    max_lon = mid;
                }
            } else {
                let mid = (max_lat + min_lat) / 2f64;
                if c.y > mid {
                    hash_value = (hash_value << 1) + 1usize;
                    min_lat = mid;
                } else {
                    hash_value <<= 1;
                    max_lat = mid;
                }
            }
            bits_total += 1;
        }
        let code: char = BASE32_CODES[hash_value];
        out.push(code);
        hash_value = 0;
    }
    Ok(out)
}
pub fn encode ( c : Coordinate < f64 > , len : usize ) -> Result < String , GeohashError > { let mut out = String :: with_capacity ( len ) ; let mut bits_total : i8 = 0 ; let mut hash_value : usize = 0 ; let mut max_lat = 90f64 ; let mut min_lat = - 90f64 ; let mut max_lon = 180f64 ; let mut min_lon = - 180f64 ; if c . x < min_lon || c . x > max_lon || c . y < min_lat || c . y > max_lat { return Err ( GeohashError :: InvalidCoordinateRange ( c ) ) ; } while out . len ( ) < len { for _ in 0 .. 5 { if bits_total % 2 == 0 { let mid = ( max_lon + min_lon ) / 2f64 ; if c . x > mid { hash_value = ( hash_value << 1 ) + 1usize ; min_lon = mid ; } else { hash_value <<= 1 ; max_lon = mid ; } } else { let mid = ( max_lat + min_lat ) / 2f64 ; if c . y > mid { hash_value = ( hash_value << 1 ) + 1usize ; min_lat = mid ; } else { hash_value <<= 1 ; max_lat = mid ; } } bits_total += 1 ; } let code : char = BASE32_CODES [ hash_value ] ; out . push ( code ) ; hash_value = 0 ; } Ok ( out ) }
Encode a coordinate to a geohash with length `len`.
Encode a coordinate to a geohash with length ` len ` .
c
Coordinate<f64>
len
usize
examples
Encoding a coordinate to a length five geohash.



let geohash_string = geohash::encode(coord, 5).expect("Invalid coordinate").



Encoding a coordinate to a length ten geohash.



let geohash_string = geohash::encode(coord, 10).expect("Invalid coordinate").


Encoding a coordinate to a length five geohash . let geohash_string = geohash :: encode ( coord 5 ) . expect ( " Invalid coordinate " ) . Encoding a coordinate to a length ten geohash . let geohash_string = geohash :: encode ( coord 10 ) . expect ( " Invalid coordinate " ) .