UAV 영상을 활용한 필지별 사면경사 추적기법 개발

UAV 영상을 활용해 필지별 사면경사를 추적하는 기법을 개발했다.

The published land price is the official land price that is guaranteed by the state and is the basis for taxation and land transactions. Land characteristics survey is the most important factor in evaluating the publicly announced land price, and is pointed out as the main cause of the error in the publicly announced land price. However, for some of the current land characteristics survey items, the difficulty of work and the survey results are different depending on the site conditions (distance or ease of access), and in particular, the slope and elevation that are difficult to clearly distinguish with the naked eye of the investigator.

In the case of, the evaluation is conducted based on the investigator's on-site investigation. This not only requires considerable time and cost, but also the need for a consistent and objective evaluation method in the same lot as the investigation results may appear differently depending on the subjective judgment of the investigator. This study developed a tracking technique for slope and altitude by lot through DEM (Digital Elevation Model), which was accurately constructed based on point cloud for residential areas and forest fields using UAV.

Land characteristics for slopes and elevations for existing appraisals through comparison of UAV-based publicly announced land prices, current publicly announced land prices, appraisals, and actual transaction prices based on the data for each parcel derived through quantitative analysis based on UAV remote sensing. It provides technical and methodological implications for improvement that can replace the limitations of the research method, and it is believed that it can be used as a persuasive base data as evaluation data and evidence for the publicly announced land price in the future.