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[168] Landscape Analysis of Lake in Urban Area Using Social Media Data

○Yuji Hoshino¹, Shun Kishima² (1. Center for Water Cycle Marine Environment and Disaster Management, Kumamoto University, 2. Ministry of Land, Infrastructure, Transport and Tourism)

Keywords:Social media data, Landscape analysis, Visible area, Waterscape in urban area

In recent years, with the spread of smart phones and social networking services (SNS), taking and sharing photos has become familiar. The data of SNS can be used to understand the complicated and diverse landscape. The purpose of this study is to analyze the landscape of the Lake Ezu in Kumamoto City, Japan, using the data of SNS. For the 402 images collected, the viewpoint and line of sight direction were identified, and all landscape components were extracted. For the viewpoint, the visible area was analyzed. A number of landscape components other than the water surface were extracted, including mountains in the distant view and trees shadow on the water surface, as well as sunrise and sunset. Eighty-one viewpoint were extracted, which could be classified into four types: open, deep, medium and near view. It was found that the characteristics of these types were identified in the setting of the distant view, the opposite bank, and the space of viewpoint. From the distribution of these types, we were able to clarify the landscape characteristics of the two water surfaces of the Lake Ezu.