proj4 좌표계 변환

proj4 좌표계 변환

참고

• http://spatialreference.org/ref/sr-org/epsg5179/proj4/

+proj=tmerc +lat_0=38 +lon_0=127.5 +k=0.9996 +x_0=1000000 +y_0=2000000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs

• http://spatialreference.org/ref/epsg/4326/proj4/

+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs 

변환

입력값 : 956494.227373, 1950603.310572

출력값 : 127.00744628908, 37.553748321534

소스코드

proj4.defs([
    [
        'EPSG:5179',
        '+title=EPSG 5179 (long/lat) +proj=tmerc +lat_0=38 +lon_0=127.5 +k=0.9996 +x_0=1000000 +y_0=2000000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs']
    , [
        'EPSG:4326',
        '+title=WGS 84 (long/lat) +proj=longlat +ellps=WGS84 +datum=WGS84 +units=degrees']
])

var coord_X = 956494.227373
var coord_Y = 1950603.310572
var wgs84 = proj4('EPSG:5179', 'EPSG:4326', [coord_X, coord_Y])
console.log(wgs84)