The Geospatial Information Authority of Japan has been producing these maps since 1960 (Showa 35) for the purpose of providing basic information on the natural conditions of land necessary for disaster prevention measures, land use, land conservation, regional development, etc. It was planned based on valuable experiences with natural disasters such as floods and high tides caused by Typhoon Kathleen in 1947 and the Ise Bay Typhoon in 1959. The content consists of three elements: topographic classification, ground height (ground elevation lines are displayed every 1 meter), and various related organizations and facilities. The scale is 1:25,000, and multi-colored land condition maps have been published. [Gojo Eiji] "How to read and use 1:25000 land condition maps" (1990) compiled and published by the Geospatial Information Authority of Japan [References] | | | | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
防災対策をはじめ、土地利用、土地保全、地域開発などに必要な土地の自然条件に関する基礎資料を提供する目的で、国土地理院により1960年(昭和35)から作成されている地図。1947年のカスリーン台風、1959年の伊勢湾台風などによる洪水、高潮などの自然災害の貴重な体験をもとにして企画された。内容は、地形分類、地盤の高さ(1メートルごとの地盤高線を表示)、関係する各種機関および施設の3要素から構成される。縮尺は2万5000分の1で、多色刷りの土地条件図が刊行されている。 [五條英司] 『国土地理院編・刊『1:25000土地条件図の見方と使い方』(1990)』 [参照項目] | | | | |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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