高程現代化於海洋測量之實踐

The Realization of Height Modernization in Hydrographic Surveying

「全球導航衛星系統」的發展與成熟，是近代人類文明的重要資源與產業，對於空間的量度，引發完全不同既往的思維。「高程現代化」即為因應而生的一項空間資訊的基礎架構更迭，由過去以物理方式建構之基準與作業，成為以幾何定義之基準架構。在陸域，銜接幾何高度與物理高程的是「大地起伏」；在海域，聯接幾何高度與水體深度的是「離距模型」。本文探討以「高程現代化」精神在海洋測量之實踐，包含「海圖基準」之深度基準建立方式，以及「以橢球面為參考之測深」作業。本文由國際共識之發展方向與文件，說明「海洋測量高程現代化」之實踐，並釐清遭到誤用之名詞並探討其原因。

"The development and realization of Global Navigation Satellite System (GNSS) is an important asset for the civilization of today. GNSS changed the fundamental concept in the establishment of spatial information infrastructure. Height modernization is one of the evolution raised accordingly. The conventional height reference system and surveying method based on physical measures, has been replaced with one based on geometry. In the land area, geoid undulation model is used to converting geometric height to physical height. In the sea, the separation model is the one connecting ellipsoid referenced height to the depth required. This note addresses the realization of height modernization in the practice of hydrographic surveying. The implementation scheme is introduced with internationally recognized documents. A miss-used terminology is also discussed. "