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Updated: Jul 24, 2025

A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry
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A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry

Published on: April 15, 2021

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一种新的点云处理方法揭示了从深层植被中隐藏的海岸巨石

Koki Nakata1, Hideaki Yanagisawa2, Kazuhisa Goto3

  • 1Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. nakata-koki864@g.ecc.u-tokyo.ac.jp.

Scientific reports
|July 5, 2023
PubMed
概括

精确模拟沿海巨石形状,即使被植被掩盖,对于重建过去的极端浪潮至关重要. 新的3D扫描和过方法使得精确的岩石形状分析能够改善海和风暴的建模.

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Methods of Obtaining Topography01:25

Methods of Obtaining Topography

Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
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Topographic Surveying and Contours01:29

Topographic Surveying and Contours

Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
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Precipitation Gravimetry

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Uniform Depth Channel Flow: Problem Solving

To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
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Plotting of Topographic Maps

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