chart datum 中文意思是什麼

chart datum 解釋
海圖基準面海圖基準面水深基準點
  • chart : n 1 海圖，航（線）圖，航海圖；地勢圖（＝physical chart），（軍用）地形圖（＝topographic chart）。...
  • datum : n. （pl. data ） 〈拉丁語〉1. 〈常 pl. 〉 數據，資料。2. 論據，作為論據的事實。3. 【數學】已知數。4. 【測】基點，基線，基面。
  1. A rather large spring tide occurred on july 4, 2004. on that occasion, the lowest sea level recorded in victoria harbour was 0. 07 metre below chart datum and a few ferries experienced difficulty while berthing

    二四年七月四日亦出現了一次較大的大潮，當日維多利亞港錄得的最低水位為海圖基準面以下0
  2. According to the hong kong observatory s tidal records at the tai po kau tide gauge station, the highest sea level was 2. 94 metres above chart datum on that day

    根據香港天文臺大埔?測潮站的記錄，當日的最高水位為海圖基準面以上2 . 94米。
  3. All elevations are relative to chart datum

    所有標高均相對于海圖基準面。
  4. Chart datum : the level to which soundings or tide heights are referenced

    海圖基準面：測量水深或潮水高度的基礎高度。
  5. The digital map is usually formed by the water depth ' s database measured on the seabottom. because of the disadvantage that the database is kept secret, this dissertation introduces a new method : first, the depth data are picked up from the electronic chart, then interpolation of the depth datum by kriging algorithm is adopted to gain the digital map. the method is the precondition of the terrain matching when it is researched by simulation, and it is the complement of the database

    通常數字地圖都是通過海底測量的海底水深數據庫來形成，針對水深數據庫存在保密性等特點，本文提出了一種從電子海圖提取水深數據，然後採用kriging方法進行插值形成數字地圖的方法，該方法是進行地形匹配模擬研究的前提，而且它也是海底水深數據庫的一個補充。
  6. Chart datum for inland navigation

    內陸航行圖深度基準面
  7. Above chart datum

    海圖基準面以上
  8. The tidal predictions are for victoria harbour and the tide heights are in metres above chart datum

    潮汐預報是以維多利亞港為準。潮水高度為海圖基準面以上高度，以米為單位。
  9. Tide height is in metre above the chart datum which is 0. 146 m below the hong kong principal datum

    潮水高度為海圖基準面以上高度，以米為單位。香港的海圖基準面在主水平基準面下0 . 146米。
  10. Water level in the tolo harbour was as high as 5. 4 metres above chart datum as compared with the normal high tide of 2. 2

    吐露港的潮水高度竟達海圖基準面以上5 . 4米，而正常的漲潮只有2 . 2米。
  11. Tide height is in metre ( m ) above the chart datum which is 0. 146 m below the hong kong principal datum

    潮水高度為海圖基準面以上高度，以米為單位。香港的海圖基準面在主水平基準面下0 . 146米。
  12. All depths in sea refer to the chart datum which is 1. 38 metres below the mean sea level

    所有水深均以海圖水平基準為計算根據，該基準位於平均海平面以下1
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