GitHub - marcosrbenso/dem_analysis: Script to perform DEM analysis considering different products and a geodetic reference

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Script to perform DEM analysis considering different products and a geodetic reference

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# DEM Accuracy Analysis Toolkit

**Author**: Marcos Roberto Benso  
**Date**: June 30, 2025

This R-based toolkit provides a reproducible workflow for analyzing the accuracy of different Digital Elevation Models (DEMs) using a variety of statistical metrics and visualizations. It supports automated comparison of DEM products against a reference elevation model.

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## 📦 Features

- Automatic loading and alignment of DEMs
- Calculates RMSE, MAE, and PBIAS for each DEM
- Generates spatial error maps with `rasterVis`
- Creates boxplots for visual comparison of DEM errors
- Exports results to CSV for further analysis

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## 🛠️ Requirements

Install the required R packages (automatically handled by the script):

```r
install.packages(c(
  "terra", "raster", "hydroGOF", "ggplot2", "rasterVis",
  "RColorBrewer", "sp", "gstat", "tidyverse", "reshape2",
  "cowplot", "grid", "scales"
))