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首页> 外文期刊>Estuarine Coastal and Shelf Science >Fast and low-cost method for VBES bathymetry generation in coastal areas
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Fast and low-cost method for VBES bathymetry generation in coastal areas

机译：快速低成本的沿海地区VBES测深法生成方法

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摘要

Sea floor topography is key information in coastal area management. Nowadays, LiDAR and multibeam technologies provide accurate bathymetries in those areas; however these methodologies are yet too expensive for small customers (fishermen associations, small research groups) willing to keep a periodic surveillance of environmental resources. In this paper, we analyse a simple methodology for vertical beam echosounder (VBES) bathymetric data acquisition and postprocessing, using low-cost means and free customizable tools such as ECOSONS and gvSIG (that is compared with industry standard ArcGIS). Echosounder data was filtered, resampled and, interpolated (using kriging or radial basis functions). Moreover, the presented methodology includes two data correction processes: Monte Carlo simulation, used to reduce GPS errors, and manually applied bathymetric line transformations, both improving the obtained results. As an example, we present the bathymetry of the Rla de Cedeira (Galicia, NW Spain), a good testbed area for coastal bathymetry methodologies given its extension and rich topography. The statistical analysis, performed by direct ground-truthing, rendered an upper bound of 1.7 m error, at 95% confidence level, and 0.7 m r.m.s. (cross-validation provided 30 cm and 25 cm, respectively). The methodology presented is fast and easy to implement, accurate outside transects (accuracy can be estimated), and can be used as a low-cost periodical monitoring method.
机译：海床地形是沿海地区管理的关键信息。如今，LiDAR和多波束技术可在这些区域提供准确的测深。但是，这些方法对于愿意定期监视环境资源的小型客户（渔民协会，小型研究小组）而言过于昂贵。在本文中，我们使用低成本的手段和免费的可自定义工具（例如ECOSONS和gvSIG（与行业标准ArcGIS进行了比较）），分析了用于垂直波束回波测深（VBES）测深数据获取和后处理的简单方法。对Echosounder数据进行滤波，重采样和插值（使用克里金法或径向基函数）。此外，所提出的方法包括两个数据校正过程：用于减少GPS误差的蒙特卡罗模拟，以及手动应用的测深线转换，均可以改善获得的结果。例如，我们介绍了Rla de Cedeira（加利西亚，西班牙西北部）的测深图，这是沿海测深方法学的良好试验场，因为它具有扩展性和丰富的地形。通过直接地面真相进行的统计分析得出了1.7 m的误差上限，95％的置信度和0.7 m r.m.s. （交叉验证分别提供30厘米和25厘米）。所介绍的方法快速，易于实施，准确的外部样线（可以估计精度），并且可以用作低成本的定期监测方法。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2012年第1期|175-182|共8页
  • 作者

    N. Sanchez-Carnero; S. Acena; D. Rodriguez-Perez; E. Counago; P. Fraile; J. Freire;

  • 作者单位

    Grupo de Recursos Marinos y Pesquerias, Universidade da Coruna, Rua da Fraga 10, 15008 A Coruna, Spain;

    Grupo de Recursos Marinos y Pesquerias, Universidade da Coruna, Rua da Fraga 10, 15008 A Coruna, Spain;

    Departamento de Fisica Matematica y de Fluidos, Facultad de Ciencias, UNED, C/ Paseo de la Senda del Rey 9, 28040 Madrid, Spain;

    Fismare Innovation para la Sostenibilidad S.L., Rua Castro de Elvina, n° 1, Bajo Izq, 15008 A Coruna, Spain;

    Departamento de Geografia Fisica y Analisis Geografico Regional, Universidad de Sevilla, C/ Dona Maria de Padilla s, 41004 Sevilla, Spain;

    Grupo de Recursos Marinos y Pesquerias, Universidade da Coruna, Rua da Fraga 10, 15008 A Coruna, Spain;

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  • 正文语种 eng
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  • 关键词

    bathymetry; coastal zone; GIS; sonar; open source software; monte carlo simulations;

    机译：测深仪沿海地区地理信息系统声纳开源软件;蒙特卡洛模拟;

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