Field detection of non-use paddy fields at Miyagi Prefecture in Japan using satellite and GIS data

Kazumasa Osawa, Ryoko Iwasa, Daisuke Kunii, Genya Saito, Chinatsu Yonezawa

    研究成果: Conference contribution

    抄録

    According to the 2000 Census of Agriculture and Forestry in Japan, the non-use paddy fields are increasing every year. The non-use paddy fields are abandoned paddy fields or fallow paddy fields. The amount of non-use paddy fields reached about 488,000ha in 2000. Especially at hilly and mountainous areas, there are many non-use paddy fields. We want to more exactly understand this situation of Japanese agriculture from the perspective of remotely sensed data in order to maintain the productivity and multi-functionalities of agriculture. We researched in Miyagi Prefecture, northeast Japan. We used 5 scenes Terra/ASTER images taken on April 17, June 4, September 1 and 24, and November 20, 2001. In this study, we researched spectral characteristics and NDVI changes at arable lands with ground truth data and a topographical map. We analyzed spectral characteristics of crops and non-use paddy fields, and made thresholds about each category to detect the land use. Using these thresholds, we constituted a decision tree and made a land use map. We examined this map and grasped Japanese agricultural state. The estimated areas of non-use paddy fields that are made in this method are higher than the statistical data. It seems that there are two reasons of this result. One reason is that the classified area of non-use paddy included mixel data and other categories. The other reason is that statistical data is different from the real state of arable lands. In this case, non-use paddy fields are more spreading than statistical data and remote sensing is potential method of detection of non-use paddy fields.

    本文言語English
    ホスト出版物のタイトルAsian Association on Remote Sensing - 27th Asian Conference on Remote Sensing, ACRS 2006
    ページ数1
    出版ステータスPublished - 2006 12月 1
    イベント27th Asian Conference on Remote Sensing, ACRS 2006 - Ulaanbaatar, Mongolia
    継続期間: 2006 10月 92006 10月 13

    出版物シリーズ

    名前Asian Association on Remote Sensing - 27th Asian Conference on Remote Sensing, ACRS 2006

    Other

    Other27th Asian Conference on Remote Sensing, ACRS 2006
    国/地域Mongolia
    CityUlaanbaatar
    Period06/10/906/10/13

    ASJC Scopus subject areas

    • コンピュータ ネットワークおよび通信

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