Detection and classification of "yatsuta" using GIS analysis based on feature width

2017 Fiscal Year Final Research Report

• Project/Area Number: 26560159
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geography
• Research Institution: National Agriculture and Food Research Organization (2016-2017); National Institute for Agro-Environmental Sciences (2014-2015)
• Principal Investigator: Sprague David 国立研究開発法人農業・食品産業技術総合研究機構, 農業環境変動研究センター, ユニット長 (90282285)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 水田 / 谷津田 / 農業環境 / GIS

Outline of Final Research Achievements

A GIS algorithm to extract rice fields based on width from polygon data was developed to map yatsuta rice paddy fields. After defining “narrow rice paddies” as those of width under 100 meters, a consistent nation-wide database of narrow rice paddies was created from Ministry of Environment vegetation polygon data. Analysis of land uses adjacent to rice fields found that woodlands occupied a large proportion of the border with narrow rice paddies. Although yatsuta rice paddies constitute a small proportion of total rice paddy area, with their strong linkages to woodlands and other adjacent land uses, they play important roles for the preservation of the agro-environment, but narrow rice paddies may be more likely to be abandoned compared to main-stream rice fields.

Free Research Field

地理情報解析