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Updated: Sep 13, 2025

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
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GEDTM30:全球整体数字地形模型在30米和衍生多尺度地形变量

Yu-Feng Ho1, Carlos H Grohmann2, John Lindsay3

  • 1OpenGeoHub, Doorwerth, Gelderland, Netherlands.

PeerJ
|July 28, 2025
PubMed
概括

一个新的开放式全球整体数字地形模型 (GEDTM30) 提供了更好的准确性,特别是在植被和建筑区域. 这种先进的数字地形模型 (DTM) 为各种应用提供了增强的分辨率和衍生变量.

关键词:
数据融合数据融合数字升高模型的数字升高模型数字地形模型是数字地形模型.地质形态测量 (Geomorphometry) 是一种地质形态测量的方法.水文学的水文学机器学习是机器学习.开放数据是开放的数据.地形变量是地形的变量.地形学地形学地形学地形学转移学习转移学习

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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 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 is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
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The Earth's shape is best described as an ellipsoid, a slightly flattened sphere created by rotating an ellipse around its minor axis. This flattening results in the polar axis being about 21 kilometers shorter than the equatorial axis. In contrast, the geoid represents the Earth's gravitational shape and aligns with the mean sea level (MSL). The geoid is an irregular equipotential surface where gravity is perpendicular at every point. Variations in Earth's mass distribution cause geoid...
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