Machine Learning Practice for Land Cover Classification Using Remote Sensing Imagery: Algorithm Comparison from Logistic Regression to Neural Networks

This article introduces a remote sensing machine learning project for beginners. By comparing the performance of five mainstream algorithms (Logistic Regression, SVM, Random Forest, XGBoost, Neural Networks) in land cover classification tasks, it helps readers understand the applicable scenarios and performance differences of different models. This project is maintained by bytemonkk and hosted on GitHub (link: https://github.com/bytemonkk/Machine-Learning-for-Remote-Sensing), covering the complete workflow from data preprocessing to model evaluation.

High-dimensional spectral data obtained via remote sensing technology is crucial for fields like environmental monitoring and urban planning, but manual interpretation is inefficient and subjective. Land cover classification is a core task in remote sensing (classifying pixels into categories like forests, water bodies, etc.). Traditional methods rely on manual features and struggle with complex scenarios. Machine learning can automatically extract features, adapt to different geographical environments and data distributions, and enable automated classification.

This project provides a beginner-friendly complete case using real multispectral datasets, covering the entire workflow from data preprocessing to model evaluation. The core goal is to compare five algorithms: linear models (Logistic Regression), kernel methods (SVM), ensemble learning (Random Forest, XGBoost), and deep learning (Neural Networks), helping readers understand the characteristics, advantages, disadvantages, and applicable scenarios of each algorithm.

• Logistic Regression: A linear model with strong interpretability and fast training speed, suitable as a baseline, but its linear assumption limits its application in complex scenarios.
• SVM: Uses kernel tricks to handle non-linear data; RBF kernel is commonly used. It performs well on high-dimensional data and is suitable for datasets with moderate sample sizes.
• Random Forest: An ensemble of decision trees with strong robustness, can evaluate feature importance, and is friendly to noisy data.
• XGBoost: A gradient boosting tree with high accuracy but complex hyperparameter tuning.
• Neural Networks: Use multi-layer non-linear transformations, can learn complex features, but require large amounts of data and computing resources.

The experiment uses training/test set splitting to ensure fairness. Evaluation metrics include accuracy (overall correctness), precision (class precision), recall (class coverage), and F1 score (a combination of the two). Confusion matrix visualization helps identify easily confused categories.

Linear models (Logistic Regression) are suitable for simple scenarios; SVM improves non-linear classification capabilities; ensemble methods (Random Forest, XGBoost) perform robustly; neural networks are prone to overfitting on small samples. Beginners can try data preprocessing (scaling, dimensionality reduction), hyperparameter tuning, or introduce advanced models like CNN/Transformer.

The project can be extended to spatial context information, temporal change detection, multi-source data fusion, and self-supervised learning (reducing annotation dependency). It is recommended that learners start from this project, try complex models, and pay attention to special challenges in remote sensing (class imbalance, spectral variability, spatial heterogeneity).