測繪工程專業(yè)英語翻譯資料jsp(1)(編輯修改稿)
2024-09-19 08:03 本頁面
【文章內(nèi)容簡介】 s anomalies throughout the Earth.（這種不規(guī)則被認為是由于【due to由于 due應當?shù)摹勘榧暗厍颉総hroughout介詞：遍及】的質(zhì)量【mass這里是質(zhì)量的意思】分布不規(guī)則【anomaly異常、不規(guī)則】）The geoid remains important to the surveyor, as it is the surface to which all terrestrial measurements are related.（由于它是對于所有有關的陸地測量的參考面【surface這里譯為參考面】，對測量者來說大地水準面依然【remain】重要）As the direction of the gravity vector (termed the vertical) is everywhere normal to the geoid, it defines the direction of the surveyor’s plumbbob line.（由于重力矢量（稱之為【term稱為】垂線【vertical垂線n.、垂直的adj.】）的方向在各處都垂直【normal垂直的、正交的、垂線、法線】于大地水準面，由測量者的鉛垂線【plumbbob line】方向就可以表示【define明確表示】）Thus any instrument which is horizontalized by means of a spirit bubble will be referenced to the local equipotential surface.（因而任何依賴【by means of依賴】水準氣泡【spirit bubble】整平【horizontalize】的儀器都參考的是局域等位面）Elevations are related to the equipotential surface passing through MSL.（高程就是關于通過平均海平面的等位面的數(shù)據(jù)）【或者翻譯為：高程與過平均海平面的等位面有關or高程參考的是過平均海平面的等位面】Such elevations or heights are called orthometric heights (H) and are the linear distances measured along the gravity vector from a point to the equipotential surface as a reference datum.（這樣的高程或高度被稱為正高（H），沿著重力矢量從一個點到作為參考基準的等位面的直線【linear直線的】距離）As such, the geoid is the equipotential surface that best fits MSL and heights in question, referred to as heights above or below MSL.（同樣地，大地水準面是最符合MSL的等位面；正被討論的【in question正在討論的、正在討論】高度，指的是【refer to提到；as當作 合起來可以譯為指的是】高于或低于MSL的高度）It can be seen from this that orthormetric heights are datum dependent.（由此可以看出，正高由其基準面決定【dependent由……決定的、依靠的】）The Reference Ellipsoid（參考橢球）The ellipsoid is a mathematical surface which provides a convenient model of the size and shape of the Earth.（參考橢球是一個數(shù)學曲面，可以提供一個關于地球的大小及形狀的方便的【convenient】模型）It is represented by an ellipse rotated about its minor axis and is defined by its semimajor axis a or the flattening f.（由一個橢圓繞它的短軸【minor axis】旋轉(zhuǎn)【rotate】表示，用它的長半軸a和扁率f來定義）The ellipsoid is chosen to best meet the needs of a particular geodetic datum system design.（這個橢球被選擇來最滿足特定大地基準系統(tǒng)設計的需要【meet one’s need滿足……的需要】）【即在設計一套特定的大地基準系統(tǒng)前首先選擇一個滿足系統(tǒng)設計的橢球】Although the ellipsoid i
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