The invention discloses a building outer
boundary line extraction method based on onboard
LiDAR (
Light Detection and
Ranging) data. The method comprises the following steps: I, acquiring
LiDAR point cloud data; II,
processing the
LiDAR point cloud data:
processing point cloud data of a building, and extracting an outer
boundary line of the building, wherein the point
cloud data of the building is processed through the following steps: 201, extracting the outer boundary points of the building; 202, extracting feature points; 203, performing
linear fitting through a least square method, and acquiring an initial
boundary line; 204, determining the main direction and the secondary direction of the building; 205, regularizing the initial boundary line: performing regularization
processing on a plurality of linear segments in the initial boundary line respectively according to the determined main direction and secondary direction; 206, acquiring the regularized boundary line. The method is simple in steps, is reasonable in design, is convenient to implement and has a good use effect; the extraction process of the outer boundary line of the building can be finished easily, conveniently and rapidly, and the regularization degree of an obtained outer boundary vector is high.