3D PHOTOGRAMMETRY MODELING FOR SAFETY MONITORING OF FORTRESS WALLS

Abstract. In the monitoring to prevent collapse or tipping in structure of linear-shaped fortress walls, record shapes like slope protrusion is very important(Jo and Hong, 2019). As way shapes, laser scan photogrammetric technology employed. A that has install several points measurement a limitation recording them if terrain undulating, becomes huge. Photogrammetry shortening effect terms cost process (Kim, 2020) compared that.This study examined measure for producing 3D mesh model with aerial ground photography walls. addition, this tested it would be possible monitor protrusion, etc. This accuracy produced photogrammetry use diagnosis structural safety walls.The research subject was Korea’s cultural heritage, Seosan Haemieupseong Fortress, section about 100m positional accuracy, elevation/section LOD, texture joint precision two models (Model & Model B) were compared.This revealed at LOD Level 4 effective displacement since could shape, curvature, stones