GENERATION METHOD OF TERRAIN RELIEF ORTHO IMAGE USING AERIAL LIDAR DATA

摘要

The present invention relates to a method for producing terrain relief orthogonal images using aerial lidar data, and more particularly, to extract ground data from aerial lidar data used for ortho-image production, and to obtain terrain relief data from the ground data. The present invention relates to a method for producing a topographic relief orthogonal image in which the relief of the terrain is three-dimensionally expressed by synthesizing the prepared orthoimage and the terrain relief data.;The terrain relief orthodontic image production method using the aerial lidar data of the present invention comprises the steps of: (S10) extracting ground data from the aerial lidar data used for ortho-image production in a specific region; (S20) constructing an irregular triangle network (TIN) from the ground data, and calculating an elevation value at the grid center point of the delonitriangle triangle constituting the irregular triangle network at the center point of each grid; (S30) extracting topographic relief data consisting of the relative height values of the elevation value of the grid to the ground data within a certain distance in each grid; (S40) performing a radiometric enhancement on the topographical relief data so as to have the same radiographic resolution as the orthoimage produced by the terrain relief data; (S50) synthesizing the RGB values of the grids of the ortho-prepared orthoimages and the gray scale values of the radio-emphasized terrain relief data according to a given degree of synthesis to produce a topographic orthogonal image. It is done by;Air lidar data, ortho images, terrain relief data, ground data