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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 hydrography
 水道學,水道測量術

From: Webster's Revised Unabridged Dictionary (1913)

 Hy·drog·ra·phy n.
 1. The art of measuring and describing the sea, lakes, rivers, and other waters, with their phenomena.
 2. That branch of surveying which embraces the determination of the contour of the bottom of a harbor or other sheet of water, the depth of soundings, the position of channels and shoals, with the construction of charts exhibiting these particulars.
 

From: WordNet (r) 2.0

 hydrography
      n : the science of the measurement and description and mapping
          of the surface waters of the earth with special reference
          to navigation