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In recent years, many of the latest smartphones or mobile devices currently in the market come with built-in cameras and GPS systems. These devices can geotag and store critical geo-information along with the photos. This crucial metadata information will be used in the development for an algorithm that will identify the relationship between geotag...
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... coordinates) of the building are required and they can manually be retrieved from Google maps. These points are passed to a polygon array to form the building. A new algorithm is applied to determine if the segment (PnPm) of any two polygon points Pn and Pm intersect with the line (PiPb) between the photo Pi and building center Pb. As shown in Fig. 3, the line from photo IMG3820 to Willis Hall has two intersections (marked in a black dot). Therefore, photo IMG3820 won"t contain Willis Hall. ...
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... Geotag technology provides geo-data, which could benefit the public authorities in the urban area. It provides methods to construct the connection between building points and geo-information on sets of photographs and to determine if these buildings fit the area [14]. The effect of site topography and current structural facilities near the construction area of a proposed structure has been considered using the Geographic Information System (GIS) [15]. ...
Earthquake occurs due to tectonic movement of a fault. Davao Region has warned by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) that new sets of fault lines appeared in the region's southern vicinity with a possible magnitude of 6.8Mw to 7.1Mw. This phenomenon is possible since Davao Region is part of the Philippine Fault Zone. This study was conducted to give specific information of the area within the vicinity's fault lines, such as soil profile and seismic information. This information is present on the area's geotagged images taken in a specific coordinate of the region. The coordinates were located using Global Positioning System (GPS), and it is used to geotag the images. The Bureau of Soils and Water Management (BSWM) provides the soil profile data such as depth of soil and its classification. In contrast, the Philippines Institute of Volcanology and Seismology provides seismic data such as magnitude and the fault line's name. In contrast, the seismic analysis was calculated through seismic provisions of the 2015 National Structural Code of the Philippines (NSCP 2015). This study shows that there are seven active fault lines Southern Davao Region namely Dacudao Fault with a magnitude of 6.5Mw, Lacson Fault with a magnitude of 6.8Mw, Tamugan Fault with a magnitude of 6.7Mw, Pangyan-Biao Fault with a magnitude of 6.8Mw, New Carmen fault with a magnitude of 6.3Mw, Tangbulan fault with a magnitude of 6.1Mw and Makilala-Malungon fault with a magnitude of 6.5Mw. This study concludes that adding detailed data on the fault line's geotagged images, such as soil and seismic information, will benefit the structural building since modern technology is applied.
