Add horizontal_tilt_angle function and tests #562
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Implements the computation of the total horizontal derivative (THDR) of a potential field grid. This function calculates the square root of the sum of squares of the horizontal derivatives in the easting and northing directions.
Includes tests for: - Agreement with a synthetic model - Rejection of 1D and 3D grids - Handling of grids containing NaN values Ensures correctness and robustness of the total_horizontal_gradient filter.
Implements the theta map filter. The function computes the arctangent of the horizontal gradient magnitude over the total gradient amplitude. Includes a detailed docstring with formula and references.
Includes: - Validation against synthetic model using finite differences and FFT - Input error handling for 1D, 3D, and NaN-containing grids - Integration of theta_map import for test discovery
Implements the horizontal tilt angle (HTA) filter, which computes the arctangent of the horizontal gradient magnitude over the absolute value of the upward derivative. Includes a full docstring with LaTeX formula and reference.
Includes: - Validation against synthetic model - Input error handling for 1D, 3D, and NaN-filled grids
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This pull request adds the
horizontal_tilt_anglefunction toharmonica._transformations.The horizontal tilt angle is a enhancement filter used in gravity and magnetic interpretation. It computes the arctangent of the horizontal gradient magnitude over the absolute value of the upward derivative.
Summary of changes:
horizontal_tilt_anglefunction with full docstring and LaTeX formulaRelevant issues/PRs:
Closes #559
Related to #560, #561