public double getCoordValue(int j, int i) {
    if (coords == null) doRead();
    return coords.get(j, i);
  }
public double getCoordValue(int j, int i) {
    if (coords == null) doRead();
    return coords.get(j, i);
  }
public double getCoordValue ( int j , int i ) { if ( coords == null ) doRead ( ) ; return coords . get ( j , i ) ; }
Get the coordinate value at the i, j index.

@param i index 0 (fastest varying, right-most)
@param j index 1
@return midpoint.get(j, i).
Get the coordinate value at the i j index .