Data analysis device, data analysis method, and program

摘要

Provided is a data analysis device for automatically detecting a step on the ground based on point cloud data representing a three-dimensional shape of a feature surface. A space subject to analysis is divided into a plurality of subspaces. A boundary search unit (22) searches for a boundary formed by the step on a horizontal plane for each of the subspaces. The boundary search unit (22) searches for a step neighborhood area having a predetermined width, in which the points projected on the horizontal plane are accumulated equal to or more than a criterion set in advance and a cloud of the points have a difference in height equal to or more than a step threshold set in advance, and searches for a directional line along a distribution of the cloud of points belonging to the step neighborhood area on the horizontal plane as the boundary.