ui/src/main/java/ucar/nc2/ui/gis/SpatialGrid.java
public void clear() {
   for (int y=0; y<countY; y++)
     for (int x=0; x<countX; x++)
       gridArray[y][x].used = false;
  }
public void clear() {
   for (int y=0; y<countY; y++)
     for (int x=0; x<countX; x++)
       gridArray[y][x].used = false;
  }
public void clear ( ) { for ( int y = 0 ; y < countY ; y ++ ) for ( int x = 0 ; x < countX ; x ++ ) gridArray [ y ] [ x ] . used = false ; }
clear all the grid cells
clear all the grid cells