正しく測ることの重要性を小学生に伝えることを目的とした、測量ワークショップ「ナスカの地上絵の再現」は、飛行機がなく上空から全体像を確認できなくても、現在の測量器械につながる向きと長さを測る原始的な道具があれば、地上絵は容易に描けたと推理し、古代のミステリーに挑戦したものです。放射法による作業は、原図上に原点を定め、測点への向きを一致させ、距離を一定倍させる単純な測量原理に基づいています。小学校での実践では、算数の単元「比例」の学習内容の応用として測量技術が成立することを示すため、双方のつながりを重視しました。また画鋲と糸という学校や家庭でも準備可能なものに教具を求め、汎用性の向上に努めました。

The surveying workshop "Reproduction of Nasca's Geoglyphs", which aims to convey the importance of accurate measurement to elementary school students, is oriented toward the current surveying instruments even if there is no airplane and the whole picture cannot be confirmed from the sky. If there was a primitive tool to measure the length, it was inferred that the geoglyph could be easily drawn, and it challenged the ancient mystery. The work by the radiation method is based on the simple surveying principle of setting the origin on the original drawing, matching the directions to the survey points, and multiplying the distance by a certain amount. In practice in elementary school, we emphasized the connection between the two in order to show that surveying technology is established as an application of the learning content of the arithmetic unit "proportional". We also sought teaching tools such as pushpins and threads that can be prepared at school and at home, and worked to improve versatility.