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This chapter defines the fundamental concepts of Digital Elevation Models, distinguishes DEM, DSM, and DTM, and describes the main global datasets, spatial resolutions, and preprocessing steps—cropping, mosaicking, and filtering—needed to prepare elevation data for analysis.

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DEM: Concepts, Data Sources, and Preparation

  • 章节

  • 发表日期：

    2025年

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  • Adriano Rolim da Paz

摘要

This chapter defines the fundamental concepts of Digital Elevation Models, distinguishes DEM, DSM, and DTM, and describes the main global datasets, spatial resolutions, and preprocessing steps—cropping, mosaicking, and filtering—needed to prepare elevation data for analysis.