cdm/src/main/java/ucar/unidata/geoloc/projection/LatLonProjection.java
public boolean crossSeam(ProjectionPoint pt1, ProjectionPoint pt2) {
    return Math.abs(pt1.getX() - pt2.getX()) > 270.0;  // ?? LOOK: do I believe this
  }
public boolean crossSeam(ProjectionPoint pt1, ProjectionPoint pt2) {
    return Math.abs(pt1.getX() - pt2.getX()) > 270.0;  // ?? LOOK: do I believe this
  }
Does the line between these two points cross the projection "seam".

@param pt1 the line goes between these two points
@param pt2 the line goes between these two points
@return false if there is no seam