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orthograph n.正投影圖;正視圖。

orthographer

The system stores spatial data and characteristic data into central database , and provides services to users in server / client mode . as the research emphases of this thesis , several key sub - systems are designed and realized . the digital map input and maintenance subsystem performs format conversion , editing and updating of spatial data ; the rail - track video playing subsystem uses video recording as reference data , then plays , inquires and traces the corresponding frames in synchronous to the scaled mileage , realizing the query of the active picture frames ; the digital map query subsystem fulfills the map query , preview and spelling of digital map orthograph 其中,地形圖輸入與維護實現了數字地圖的格式轉換、編輯處理以及空間數據的更新操作,解決了不同格式空間數據的互相轉換問題;線路錄象播放將線路錄像數據作為系統的一種索引數據,活動影像的畫面與里程相對應,實現了基于線路錄像的播放、查詢和檢索的功能,實現了基于活動畫面的查詢檢索功能;數字地圖子系統完成了圖形查詢、數字地圖與線路正射圖像瀏覽、圖幅拼接等功能。

This technical route was based on integrated ccd camera calibration and image registration by orthograph . ccd camera calibration was accomplished by vertical photograph on the wall of buildings 通過對現有ccd相機標定方法的綜合分析,提出利用建筑物立面現成規則圖形紋理結構的垂直攝影法來完成ccd相機綜合誤差的標定。

Our experiments show that the photogrammetry with digital camera has a better precision and the large scale topographic map and orthograph can be produced with it 試驗證明利用數碼相機進行攝影測量精度很高,能夠用來測制大比例尺地形圖和正射影像圖。

In a general way , aerial image is not orthograph , most buildings exist slope angle as well as vertical lines in aerial images 一般,得到的航空影像并不是正攝影像,在影像中對大多數建筑物均存在傾斜視角,且絕大多數建筑物還存在垂直邊緣。