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This paper presents an effort to evaluate the generated digital elevation model (DEM) from an active sensor onboard satellite of Sentinel-1A and from aerial photos taken using an unmanned aerial vehicle (UAV). The objective is to compare the quality of generated DEM and review the processes for disaster mitigation and prevention plans application. The radar data acquisition used in this study is pair of SLC-type radar data. The interferogram is processed from the coherence and the phase of complex data of the pair radar imageries. Meanwhile, aerial photography was taken within the smaller urban area in Padang City. The photogrammetry process to generate the DEM was conducted using the structure from motion (SfM) technique. The quality and procedures are reviewed by comparing the DEM products with other publicly available DEM data from DEMNAS, SRTM, and AW3D. This study found that generating the DEM from Sentinel-1 interferometry SAR is a challenging process. The product is unmatched and has lower quality compared to available DEM data due to several identified factors. In contrast, high computational cost photogrammetry produced good quality DEM if sufficient ground control points (GCP) were set.

This study aims to find out the influence of the Korean Wave, brand ambassador, and brand awareness on the brand image, and its impacts on purchasing decisions of Scarlett Whitening products. The population in this study was at least 18 years old, live in Ciayumajakuning (Cirebon, Indramayu, Majalengka, and Kuningan), watched or listened to at least 3 dramas/films/songs, knew that Song Joong-ki is the brand ambassador of Scarlett Whitening, and buyer and consumer of Scarlett Whitening products. The research method used non-probability sampling with purposive sampling. The samples were 170 respondents. The statistical instrument used was Structural Equation Model Partial Least Square (SEM-PLS). Data processing used SmartPLS version 3. The results of the study showed that Korean Wave had no influence on brand image, while brand ambassador and brand awareness influence the brand image. Moreover, Korean Wave, brand ambassador, and brand awareness had no influence on buying decisions, while brand image influence the buying decision. Brand image can mediate brand ambassador and brand awareness, but a brand image cannot mediate Korean Wave.