Abstract Remote sensing is becoming common in the estimation of bathymetry for navigational charting through a process known as Satellite Derived Bathymetry (SDB). Most SDB techniques currently used by hydrographic offices employ an empirical approach, requiring the use of in-situ data to calibrate a relationship between spectral information and coincident depths. This article reports on a multi-site test of an alternative SDB method which uses photogrammetry to extract depths from stereo WorldView-2 imagery. In areas with heterogeneous seafloors, the empirical approach faces difficulties in establishing the relationship between colour and depth, while the photogrammetric approach uses the contrasting seafloor features for triangulation. Additionally, the photogrammetric method may be applied in areas lacking previous survey data. Five study areas in Nunavut, Canada were selected to test the robustness of the method in different environments and under different imaging conditions. Study areas were (with resulting RMSE/Bias given in metres) Coral Harbour (0.84/−0.47), Cambridge Bay (1.16/−0.15), Queen Maud Gulf (0.97/0.06), Arviat (0.99/−0.009), and Frobisher Bay, where extraction largely failed due to environmental conditions. Accuracies demonstrated here are similar to those seen using the empirical approach, suggesting that these two methods may be used in conjunction, each applied to regions where they are better suited.

中文翻译：

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加拿大北极地区摄影测深

摘要 遥感在通过称为卫星衍生水深测量 (SDB) 的过程估算航海图的水深中变得越来越普遍。水文部门目前使用的大多数 SDB 技术都采用经验方法，需要使用现场数据来校准光谱信息和重合深度之间的关系。本文报告了另一种 SDB 方法的多站点测试，该方法使用摄影测量从立体 WorldView-2 图像中提取深度。在海底异质区域，经验方法在建立颜色和深度之间的关系方面面临困难，而摄影测量方法使用对比海底特征进行三角测量。此外，摄影测量方法可应用于缺乏先前调查数据的地区。选择了加拿大努纳武特的五个研究区域来测试该方法在不同环境和不同成像条件下的稳健性。研究区域是（结果 RMSE/偏差以米为单位）珊瑚港 (0.84/−0.47)、剑桥湾 (1.16/−0.15)、莫德皇后湾 (0.97/0.06)、阿维亚特 (0.99/−0.009) 和 Frobisher海湾，由于环境条件，提取在很大程度上失败了。这里展示的准确性与使用经验方法看到的相似，这表明这两种方法可以结合使用，每种方法都适用于它们更适合的区域。Queen Maud Gulf (0.97/0.06)、Arviat (0.99/−0.009) 和 Frobisher Bay，那里的开采很大程度上因环境条件而失败。这里展示的准确性与使用经验方法看到的相似，这表明这两种方法可以结合使用，每种方法都适用于它们更适合的区域。Queen Maud Gulf (0.97/0.06)、Arviat (0.99/−0.009) 和 Frobisher Bay，那里的开采很大程度上因环境条件而失败。这里展示的准确性与使用经验方法看到的相似，这表明这两种方法可以结合使用，每种方法都适用于它们更适合的区域。