ui/src/main/java/ucar/nc2/ui/geoloc/Navigation.java
public ProjectionRect screenToWorld(Point2D start, Point2D end) {
    ProjectionPointImpl p1 = new ProjectionPointImpl();
    ProjectionPointImpl p2 = new ProjectionPointImpl();

    screenToWorld( start, p1);
    screenToWorld( end, p2);

    return new ProjectionRect(p1.getX(), p1.getY(), p2.getX(), p2.getY());
  }
public ProjectionRect screenToWorld(Point2D start, Point2D end) {
    ProjectionPointImpl p1 = new ProjectionPointImpl();
    ProjectionPointImpl p2 = new ProjectionPointImpl();

    screenToWorld( start, p1);
    screenToWorld( end, p2);

    return new ProjectionRect(p1.getX(), p1.getY(), p2.getX(), p2.getY());
  }
convert screen Rectangle to a projection (world) rectangle