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ACCURACY EVALUATION OF STRUCTURE FROM MOTION THERMAL MOSAICING IN THE CENTER OF TOKYO Nurwanda, Atik; Honjo, Tsuyoshi; Tsunematsu, Nobumitsu; Yokoyama, Hitoshi
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 15, No 2 (2018)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1827.176 KB) | DOI: 10.30536/j.ijreses.2018.v15.a2856

Abstract

In the airborne and high-resolution measurement of Land Surface Temperature (LST) over large area, capturing and synthesizing of many images are necessary. In the conventional method, the process of georeferencing a large number of LST images is necessary to make one large image. Structure from Motion (SfM) technique was applied to automized the georeferencing process. We called it “SfM Thermal Mosaicing”. The objective of this study is to evaluate the accuracy of SfM thermal mosaicing in making an orthogonal LST image. By using airborne thermal images in the center of Tokyo, the LST image with the 2m resolution was created by using SfM thermal mosaicing. Its accuracy was then analyzed. The result showed that in the whole examined area, the mean error distance was 4.22m and in the small parts of the examined area, the mean the error distance was about 2m. Considering the image resolution, the error was minimal indicating good performance of the SfM thermal mosaicing. Another advantage of SfM thermal mosaicing is that it can make precise orthogonal LST image. With the progress of UAV and thermal cameras, the proposed method will be a powerful tool for the environmental researches on the LST.
IDENTIFYING VISITOR PREFERENCES FOR LOCATIONS AND FEATURES IN BOGOR BOTANICAL GARDEN, INDONESIA, USING GPS TRACKING AND GEOTAGGED PHOTOS Hadi, Akhmad Arifin; Mizuuchi, Yusuke; Setyanti, Dwi; Honjo, Tsuyoshi; Furuya, Katsunori
Journal of architecture&ENVIRONMENT Vol 16, No 1 (2017)
Publisher : Department of Architecture, Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1573.92 KB) | DOI: 10.12962/j2355262x.v16i1.a3029

Abstract

Research on visitors’ landscape preferences in a botanical garden is useful for understanding what visitors see while they visit the site. Analyzing visitors’ preference by using GPS tracking data and Visitors’-Employed Photography (VEP) is one of approach that successfully implemented in some studies. GPS loggers and visitors’ photos were used in this study to identify and locate features considered impressive by visitors. This research involved 35 normal visitors of Bogor Botanical Garden (BBG) as respondents, who were asked to capture impressive landscape features while visiting the BBG. Each respondent used their own smartphone or camera to take photographs and recorded their actual positions using a GPS logger.  The data of GPS tracking and geo-tagged photos were exported into ArcGIS. The 20 by 20 meters square cell were joined with points data to calculate density of tracking points and photos points. A cell was categorized as hotspots if the number of points more than 2.5 times of standard deviation. The results show that respondents were concentrated on several geographic locations within the BBG; the most-photographed features were water, structures, and plants. Interestingly, the most-photographed plants were those arranged for recreational (rather than botanical or educational) purposes, suggesting new considerations for managers of botanical gardens.
IDENTIFYING COLONIAL LANDSCAPE STYLES IN BOGOR BOTANICAL GARDEN THROUGH VISITORS’ GEO-TAGGED PHOTOS Hadi, Akhmad Arifin; Mizuuchi, Yusuke; Honjo, Tsuyoshi; Furuya, Katsunori
Indonesian Journal of Conservation Vol 7, No 2 (2018): IJC
Publisher : Indonesian Journal of Conservation

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The landscape of Bogor Botanical Garden (BBG) is influenced by different eras, particularly Dutch Colonial and post-war Indonesia. The research investigates visitors’ perceptions related to landscape of BBG based on visitors’ on-site experiences. The research involved 94 research participants, include local tourists and landscape architecture students. They were asked to take photo of landscape or elements they deemed colonial look landscape style using their own camera and send them online to researcher by social media. Each respondent were handed a GPS logger to record the capture locations of each photo. The results revealed that the most photos of colonial look landscape style were consist of buildings and hardscapes as focused objects, where Presidential Palace and Lady Raffles monument were buildings that mostly appear in photos. The photos’ captured locations were also concentrated to those buildings indicated that landscape surround those buildings had strong characteristics of colonial landscape style. The study also showed the effectiveness of inviting participants with educational background in landscape architecture than normal visitors to show perception of colonial look landscape on BBG site.