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雨の日はオーディオ､晴れたら鳥を見に行こう
雨の日はオーディオ､晴れたら鳥を見に行こう
GPSロガーというのは、ただひたすらGPS測位を行って測位結果を保存する機器です。例えば、アウトドアでどんなルートをたどったか後で確認したり、デジカメの写真にあとから位置情報を付け …
国土地理院が管理する測量用の水準点というものがあちらこちらにあり正確な座標がわかります。水準点の情報は以下のページで閲覧することができます。 国土地理院の基準点成果等閲覧サービス …
グリニッジ天文台へ行って、グリニッジ子午線の上に立ってきました。グリニッジ子午線は世界を東と西に分ける子午線で、経度 0°になります。 ところがグリニッジ子午線の上で GPSで測位 …