The RD (Rijks-Driehoek) system is the coordinate system used by the Dutch geographical service. Conversion to and from WGS84 (World Geodetic System; latitude and longitude pairs) is not entirely straightforward. The conversion software is based on the formulas and coefficients in this (Dutch) document (contains a summary in English). This library works for coordinates within the Netherlands (and some area outside it). Highest precision is achieved West of 6.0°E. You can enter either RD-coordinates (in meters) or WGS84-coordinates in degrees using a decimal point.
convert WGS84 to Rijksdriehoek
package main
import (
"fmt"
"github.com/arnobroekhof/rd2wgs84"
)
func main() {
wgs84 := rd2wgs84.NewWSG84Coordinates(52.37214383811702, 4.905597604352241)
rd := wgs84.ToRD()
fmt.Println(rd.X) //122202
fmt.Println(rd.Y) //487250
}convert Rijksdriehoek coordinates to WGS84
package main
import (
"fmt"
"github.com/arnobroekhof/rd2wgs84"
)
func main() {
rd := rd2wgs84.NewRDCoordinates(122202, 487250)
wgs84 := rd.ToWGS84()
fmt.Println(wgs84.Lat) //52.37214383811702
fmt.Println(wgs84.Lon) //4.905597604352241
}