12. Analyzing Global Building Footprints

12.1. Introduction

12.2. Learning Objectives

12.3. About the Dataset

12.4. Installation and Setup

12.4.1. Library Import and Verification

12.5. Installing and Loading Extensions

12.6. Exploring Available Data

12.6.1. Understanding the Dataset Scale

12.7. Regional Analysis with Bounding Box Filtering

12.7.1. Loading Regional Data with Spatial Filters

12.7.2. Basic Statistics

12.7.3. Building Size Distribution

12.7.4. Spatial Sampling and Visualization

12.8. Multi-Region Comparison

12.8.1. Visualizing Region Comparisons

12.9. Data Source Filtering and Quality Assessment

12.10. Grid-Based Spatial Aggregation

12.11. Global-Scale Analysis

12.12. Building Height Analysis

12.13. H3-Based Aggregation

12.14. Performance Considerations

12.14.1. Using Tight Bounding Box Filters

12.14.2. Column Selection

12.14.3. Sampling for Exploration

12.14.4. Load Once, Query Many Times

12.15. Key Takeaways

12.16. Exercises

12.16.1. Exercise 12.1: Regional Deep Dive

12.16.2. Exercise 12.2: Multi-Resolution Grid Analysis

12.16.3. Exercise 12.3: Cross-Regional Building Size Analysis

12.16.4. Exercise 12.4: Data Source Quality Analysis

12.16.5. Exercise 12.5: Building Height Analysis

12.16.6. Exercise 12.6: Query Performance Optimization Challenge

12.16.7. Exercise 12.7: H3 Hexagonal Aggregation Analysis

12.16.8. Exercise 12.8: Global-Scale Sampling Analysis