Convert S2cell ID To Latitude And Longitude And Convert Latitude And Longitude To S2cell

In this code, you will see how to convert S2 cell to Latlong and latlong to S2cell.

1. Convert S2Cell Id to Latitude and Longitude

To get the Latitude and Longitude of given S2cell Id, below is the code,

public List < String > getLatLong(String s2Id) {
    List < String > latlong = new ArrayList < > ();
    if (s2Id == null) {
        Assert.fail("Invalid S2Id provided");
    }
    S2CellId cell = new S2CellId(Long.parseLong(s2Id));
    double latitude = cell.toLatLng().lat().degrees();
    double longitude = cell.toLatLng().lng().degrees();
    latlong.add(String.valueOf(latitude));
    latlong.add(String.valueOf(longitude));
    return latlong;
}

2. Convert Latitude and Longitude to S2Cell Id

To get the S2cell Id of given Latitude and Longitude below is the code,

public String getS2Id(String latitude, String longitude) {
    if ((latitude == null || latitude.isEmpty()) || (longitude == null || longitude.isEmpty())) {
        Assert.fail("Invalid latitude/longitude provided");
    }
    S2LatLng s2LatLng = S2LatLng.fromDegrees(Double.parseDouble(latitude), Double.parseDouble(longitude));
    return String.valueOf(S2CellId.fromLatLng(s2LatLng).id());
}