PURPOSE: A large cross sectional basic geological survey method is provided to perform a laser scanning process with respect to a cross section for each fixed depth, thereby significantly improving durability and security of buildings.;CONSTITUTION: A plurality of reference points is installed in a field for a geological survey(S10). A laser scanning process for the reference point and ground is performed in a plurality of determined positions(S20). A digital camera pictures the ground after the laser scanning process(S30). Three-dimensional image data with respect to the ground is generated using an image pictured with the digital camera and a value acquired from the laser scanning process(S40). Data required for building design is generated by analyzing the generated image data(S50).;COPYRIGHT KIPO 2012
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