code: public static Coordinate rowColToCenterCoordinates( Window active, int row, int col ) {
  
          double north = active.getNorth();
          double west = active.getWest();
          double nsres = active.getNSResolution();
          double ewres = active.getWEResolution();
  
          double northing = north - row * nsres - nsres / 2.0;
          double easting = west + col * ewres + ewres / 2.0;
  
          return new Coordinate(easting, northing);
      }
docs: <p>
  Transforms row and column index of the active region into the regarding northing and easting
  coordinates. The center of the cell is taken.
  </p>
  <p>
  NOTE: basically the inverse of
  {@link GrassLegacyUtilities#coordinateToNearestRowCol(Window, Coordinate)}
  </p>
  
  @param active - the active region (can be null)
  @param row - row number of the point to transform
  @param col - column number of the point to transform
  @return the point in N/E coordinates of the supplied row and column