講演詳細

経営部門[Forest Management]

日付	2026年3月18日
開始時刻	10:15
会場名	201B
講演番号	D-21
発表題目	Assessing Orthophoto Accuracy from Aerial Photographs through Various Image Scanning and Digital Acquisition Methods Assessing Orthophoto Accuracy from Aerial Photographs through Various Image Scanning and Digital Acquisition Methods
所属	Forestry and Forest Products Research Institute
要旨本文	Orthophotos play a vital role in landscape interpretation, however, achieving high positional accuracy with old aerial photographs remains challenging. This study, therefore, examines the orthophoto accuracies of Ibaraki Prefecture using old aerial photographs with multiple image scanning devices. The results revealed that orthophotos generated from surveying scanner, high-resolution digital camera, and low- and high-resolution general-purpose scanner with geometric correction provided the most reliable spatial precision, achieving RMSEXY values of 2.34 m, 2.00 m, 1.99 m, and 2.08 m, respectively. In contrast, general-purpose scanner with no geometric correction provided higher horizontal errors ranging from 13.62 m to 14.06 m. Vertical RMSEZ values varied between 3.29 m and 4.99 m across all datasets. Overall, the findings highlight the applicability of low-cost image scanning devices for orthophoto generation.
著者氏名	○Kyaw Win1 ・ Eiji Kodani1 ・ Shinya Tanaka1 ・ Naoyuki Furuya1 ・ Hideki Saito1 ・ Osamu Uchida2 ・ Masaki Tanaka2 ・ Kazuo Oda2 ・ Yoshinobu Nonoguchi3
著者所属	1Forestry and Forest Products Research Institute ・ 2Asia Air Survey Co., Ltd. ・ 3グリーン航業株式会社
キーワード	Aerial photogrammetry, Ibaraki prefecture, Image scanning technologies, Orthophoto accuracy, Spatial data quality
Key word	Aerial photogrammetry, Ibaraki prefecture, Image scanning technologies, Orthophoto accuracy, Spatial data quality