@property
    def extent(self):
        return ( self.xllcorner, 
                 self.yllcorner, 
                 self.xllcorner+self.cellsize*(self.ncols-1), 
                 self.yllcorner+self.cellsize*(1-self.nrows) )
dataset/ETHPy150Open bmander/graphserver/pygs/graphserver/ext/ned/elevation/elevation.py/GridFloat.extent/swapped operands of `-`