def calc_compass_center(self):
        # calculate center of data
        x = float(self.width) / 2.0
        y = float(self.height) / 2.0

        # radius we want the arms to be (approx 1/4 the smallest dimension)
        radius_px = float(min(self.width, self.height)) / 4.0

        return self.calc_compass_radius(x, y, radius_px)
    #
    #<----- TODO: merge this into wcs.py ?
dataset/ETHPy150Open ejeschke/ginga/ginga/AstroImage.py/AstroImage.calc_compass_center/original