Re: [Geotools-gt2-users] Calculate new Coordinate to distance

[Michael B. <mic...@gm...>]

Hi Abel,

> Hello michael. I can a problem with GeodeticCalculator. I don’t know two
> point, I know distance. When calculate two coordinate whit the distance?
>

You need:
1. starting location
2. distance
3. azimuth (= bearing = angle)

Here's an example...

GeodeticCalculator calc = new GeodeticCalculator( myCRS );

// you can do this...
double longitude = ...  // in decimal degrees
double latitude = ...    //
calc.setStartingGeographicPoint( longitude, latitude );

// or this...
DirectPosition startPos = ...
calc.setStartingPosition( startPos );

// then set the distance and bearing from the start point
double distance = ...
double dir = ... // bearing in decimal degrees (-180 : 180)
calc.setDirection( dir, distance );

// now get the destination
DirectPosition destination = calc.getDestinationPosition();

You'll need to put the above code in a try - catch block for TransformException.

Hope this helps.  Let us know how you go.

Michael