Development of Low-Cost 3D Building Model Using National Digital Elevation Model in Urban Area of Bandung City, Indonesia

Abstract

Sustainable city planning is one of many countries' 2030 sustainable development goals. In carrying out sustainable urban planning, it is necessary to look at the 3D aspect of the building. However, 3D mapping for large areas is very expensive. So we need an alternative to make three-dimensional buildings in urban areas that are cheaper. This study will review how well the three-dimensional reconstruction of urban areas uses open-source data from the Indonesian National Digital Elevation Model (DEMNAS) with a spatial resolution of 8 meters. This study found that the RMSE value of the DEMNAS 3D model reached 2.320 meters with the optimum 3-dimensional reconstruction at a medium building height around 5-7 meters. Three-dimensional modelling with DEMNAS will be good in relatively flat areas. This research hope can help better and lower cost sustainable city planning.