ACADSTAFF UGM
| Judul/Title | Conformity Analysis on the Use of Hydro Enforcement Method to Produce Digital Terrain Model Using the LiDAR Data as Indonesian Basic Geospatial Information, Case Study: Sumedang District, West Java, Indonesia |
| Penulis/Author | Ilham Jamaluddin (1) ; WILLIAM KRISTA M (2); Desrina Putri (3); Prof. Muhammad Kamal, S.Si., M.GIS., Ph.D. (4) |
| Tanggal/Date | 2020 |
| Kata Kunci/Keyword | |
| Abstrak/Abstract | Basic geospatial information is a basic information that must be collected in all regions of Indonesia. One of the basic geospatial information is Digital Terrain Model (DTM) which contains surface altitude information. There are several methods for constructing DTM, one of them is by using the Light Detection and Ranging (LiDAR) data. LiDAR is one of the active remote sensing system and is growing rapidly for many applications. LiDAR data contains altitude information which can be processed to produce DTM. The acquisition of LiDAR data in Indonesia uses infrared electromagnetic waves which has low quality for identifying water objects. Therefore, the visualization of aquatic objects in Lidar-based DTM is not optimal, thus a method to improve the quality of DTM is needed. The hydro enforcement is one of the methods to improve the quality of Lidar-based DTM which employs the principle that water flows from high to low place. By using this method, the water object on the DTM would appear smoother and represent the actual conditions of the river. This research was conducted in Sumedang Districts due to the topographic characteristics ? hills and large rivers in the valley, which needs a good visualization for water objects. The pre-processing of Lidar data includes the calculations of strip adjustment value, point density value, and point spacing value ? which is used to determine quality, and determination of optimal scale. Based on the calculations, the value of strip adjustment was 0.0001625, which indicates a good quality LiDAR data. The point density value was 1.125 and the value of point spacing was 0.94375, thus obtaining the optimum scale to be 1:1,000 based on the provisions of Indonesian Geospatial Information Agency (BIG). Processing of LiDAR data using hydro enforcement method can be performed by removing mass point on the water body and make break-line along the riverbank. The result showed that the water objects on DTM constructed from hydro enforcement method had a better visualization compared to DTM without using this method. Conformity analysis ? considering the provisions made by BIG, shows that the hydro enforcement method done is suitable to make the DTM in this study area. |
| Level | Internasional |
| Status |