A ground shape estimation program, ground shape estimation apparatus, and ground shape estimation method capable of automatically removing a point group other than ground points as noise with high probability and estimating a three-dimensional shape of the ground with high accuracy. provide. A ground shape estimation program (1a) obtains a ground line for a target area, a three-dimensional point cloud data acquisition unit (51) for acquiring three-dimensional point cloud data consisting of three-dimensional coordinates of a plurality of points in the target area. Among the point groups existing between the vertical section setting unit 52 that sets the vertical section and the two planes that are parallel to each other with the vertical section as the center plane, the ground that forms the surface of the ground The computer is caused to function as a noise removal processing unit 53 that removes points other than the points as noise.
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