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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Analytical stereoplotter ： ウィキペディア英語版 Analytical stereoplotter With the introduction of computers, the analytical stereoplotter became a popular machine of choice photogrammetry in the late 1960s to 1970s. A stereoplotter is an instrument that uses stereo photographs to determine elevations for the purpose of creating contours on topographic maps. Computers brought the capability to execute more precise calculations that ensure additional accurate output instead of approximations. This innovation also allowed a shift to a digital format rather than paper. Analytical stereoplotters edged out their analog predecessors and became the primary method of acquiring elevation data from stereo photographs. == Projection system == Analytical stereoplotters use a mathematical projection based on the co-linearity (two vectors pointing in the same direction) equation model. The mechanical element of the instrument is a very accurate, computer-controlled device that compares two photographs simultaneously. The measurement system can be made to create a precise measurement for images because the photo stages only move via the x and y coordinates that are programmed into the system. The Kelsh stereoplotter by comparison, was built with a fixed focal distance and focal length of lens for projection. The ratio for scale was also fixed. In contrast, the analytical stereoplotter has no substantial limitations on focal length or scale. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Analytical stereoplotter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.