Summary LiDAR annotation is foundational to autonomous vehicle development. By labeling 3D point cloud data captured from LiDAR sensors, engineers give AI models the spatial awareness they need to understand the world and identifying objects, predicting movement, avoiding collisions, and navigating safely. This comprehensive guide breaks down LiDAR annotation from end to end: 1. How LiDAR works 2. Why annotation is needed 3. How 3D datasets are labeled 4. What challenges tea