Function mercator::lnglat_to_mercator

pub fn lnglat_to_mercator(
    lng: f64, 
    lat: f64, 
    center_lng: f64, 
    k0: f64, 
    dx: f64
) -> (f64, f64)

convert croodinate from wgs84 to mercator projection

• https://en.wikipedia.org/wiki/Mercator_projection

Examples

use mercator::lnglat_to_mercator;
let k0:f64 = 0.9999;
let dx:f64 = 250000.0;
let lng:f64 = 120.982025;
let lat:f64 = 23.973875;
let (x, y) = lnglat_to_mercator(lng, lat, 121.0, k0, dx);