Development of an internet service to display flooded scenes by 3DCG

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K04003
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 17030:Human geosciences-related
• Research Institution: Okayama University of Science
• Principal Investigator: Shimada Hideyuki 岡山理科大学, 工学部, 教授 (70268598)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 浸水 / 3D表示 / インターネット / Webブラウザ / MMS / Mobile Mapping System

Outline of Final Research Achievements

During the heavy rains of July 2018, many people were killed indoors in the Mabi district of Kurashiki City, Okayama Prefecture, due to the lack of awareness of the dangers caused by flood hazard maps. In this study, we developed a website that can display detailed flood conditions in 3D based on the actual elevation by constructing a wide-area 3D scene from point clouds captured by driving through the Mabi district using a mobile mapping system (a mobile measurement vehicle) and distributing it on the Internet. Users can easily place a model of a car or a person in the 3D scene and visually check the degree of danger involved in walking on a flooded road or passing through an underpass when flooded.

Free Research Field

地理情報処理

Academic Significance and Societal Importance of the Research Achievements

広域をレーザスキャンして得た膨大な3D点群から面を生成して3Dモデルを構築するには，通常は人手による作業を要するため，新規の3Dモデル作成やその後の更新は容易ではない。本研究は，MMSで道路を走行して得た高密度の3D点群を様々に処理し，インターネットで配信可能な3Dシーンにまで自動変換する一連の技術を含み，3D点群データ処理技術としての学術的意義がある。また，多くの地域の3DモデルがWebブラウザで配信されることで，身近な地域で発生しうる浸水状況をリアルに確認でき，防災意識が高まるという社会意義がある。