refmod.dtm_helper

Module Contents

refmod.dtm_helper.matlab_gradient(img, h)

refmod.dtm_helper.dtm2grad(dtm, resolution=1, normalize=False)

Computes the gradient of a Digital Terrain Model (DTM).

Parameters:

• dtm (numpy.ndarray) – The input DTM as a 2D numpy array.

• resolution (float, optional) – The resolution of the DTM. Defaults to 1.

• normalize (bool, optional) – Flag indicating whether to normalize the gradient vectors. Defaults to False.

Returns:

The gradient vectors of the DTM.

Return type:

(numpy.ndarray)

Examples

>>> dtm = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
>>> dtm2grad(dtm, resolution=0.5, normalize=True)
array([[[-2.82842712, -2.82842712,  1.41421356],
        [-2.82842712, -2.82842712,  1.41421356],
        [-2.82842712, -2.82842712,  1.41421356]],
       [[-2.82842712, -2.82842712,  1.41421356],
        [-2.82842712, -2.82842712,  1.41421356],
        [-2.82842712, -2.82842712,  1.41421356]],
       [[-2.82842712, -2.82842712,  1.41421356],
        [-2.82842712, -2.82842712,  1.41421356],
        [-2.82842712, -2.82842712,  1.41421356]]])