Datum (JOSM)

All Known Implementing Classes:

AbstractDatum, CentricDatum, GRS80Datum, NTV2Datum, NullDatum, SevenParameterDatum, ThreeParameterDatum, WGS84Datum
```
public interface Datum
```
Represents a geodetic datum. Basically it provides conversion functions from and to the WGS84 datum.

Since:

4285

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`LatLon`	`fromWGS84(LatLon ll)`	Convert lat/lon from `Ellipsoid.WGS84` to this datum.
`Ellipsoid`	`getEllipsoid()`	Returns the ellipsoid associated with this datum.
`java.lang.String`	`getName()`	Returns a human readable name of this projection.
`java.lang.String`	`getProj4Id()`	Replies the Proj.4 identifier.
`LatLon`	`toWGS84(LatLon ll)`	Convert lat/lon from this datum to `Ellipsoid.WGS84` datum.

- Method Detail
  - getName
```
java.lang.String getName()
```
    Returns a human readable name of this projection.
    
    Returns:
    
    a human readable name of this projection
  - getProj4Id
```
java.lang.String getProj4Id()
```
    Replies the Proj.4 identifier.
    
    Returns:
    
    the Proj.4 identifier (as reported by cs2cs -ld) If no id exists, return null.
  - getEllipsoid
```
Ellipsoid getEllipsoid()
```
    Returns the ellipsoid associated with this datum.
    
    Returns:
    
    the ellipsoid associated with this datum
  - toWGS84
```
LatLon toWGS84(LatLon ll)
```
    Convert lat/lon from this datum to Ellipsoid.WGS84 datum.
    
    Parameters:
    
    ll - original lat/lon in this datum
    
    Returns:
    
    lat/lon converted to WGS84
  - fromWGS84
```
LatLon fromWGS84(LatLon ll)
```
    Convert lat/lon from Ellipsoid.WGS84 to this datum.
    
    Parameters:
    
    ll - original lat/lon in WGS84
    
    Returns:
    
    converted lat/lon in this datum