code: public static Window getRectangleAroundPoint( Window activeRegion, double x, double y ) {
  
          double minx = activeRegion.getRectangle().getBounds2D().getMinX();
          double ewres = activeRegion.getWEResolution();
          double snapx = minx + (Math.round((x - minx) / ewres) * ewres);
          double miny = activeRegion.getRectangle().getBounds2D().getMinY();
          double nsres = activeRegion.getNSResolution();
          double snapy = miny + (Math.round((y - miny) / nsres) * nsres);
          double xmin = 0.0;
          double xmax = 0.0;
          double ymin = 0.0;
          double ymax = 0.0;
  
          if (x >= snapx) {
              xmin = snapx;
              xmax = xmin + ewres;
          } else {
              xmax = snapx;
              xmin = xmax - ewres;
          }
  
          if (y <= snapy) {
              ymax = snapy;
              ymin = ymax - nsres;
          } else {
              ymin = snapy;
              ymax = ymin + nsres;
          }
  
          // why do I have to put ymin, Rectangle requires the upper left
          // corner?????!!!! Is it a BUG
          // in the Rectangle2D class? or docu?
          // Rectangle2D rect = new Rectangle2D.Double(xmin, ymin, ewres, nsres);
          return new Window(xmin, xmax, ymin, ymax, 1, 1);
  
      }
docs: return the rectangle of the cell of the active region, that surrounds the given coordinates
  
  @param activeRegion
  @param x the given easting coordinate
  @param y given northing coordinate
  @return the rectangle localizing the cell inside which the x and y stay