def df_fit(self):
        return self.trace()
Compares the tile stores from two databases.
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/bspline.py/SmoothingSpline.df_fit--crossover with--dataset/ETHPy150Open GeoscienceAustralia/agdc/src/tilecompare.py/compare_tile_stores