Reduce memory allocation during some styling operations #1262
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Specifically, when we apply a style, in some instances the tile or region is converted from one dtype to a float in order to preserve some of the transform properties through the process. We had been using `float`, which internally is `np.float64`. But, `np.float32` gives sufficient accuracy for our styles. With this change, `np.float32` is used unless the base datatype is `float64`, in which we do not reduce the precision.
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Specifically, when we apply a style, in some instances the tile or region is converted from one dtype to a float in order to preserve some of the transform properties through the process. We had been using
float, which internally isnp.float64. But,np.float32gives sufficient accuracy for our styles. With this change,np.float32is used unless the base datatype isfloat64, in which we do not reduce the precision.