Raw point clouds are rich, but they are not always practical deliverables. Surface modeling is the step that turns those raw points into a terrain representation that is easier to contour, easier to draft, and easier for the customer to work with.
What makes it difficult
Trees, structures, objects, noise, and imperfect classification all affect the surface. A technically complete model can still be operationally poor if it carries too much clutter or hides the actual ground behavior that matters for the project.
Why this matters to customers
Good surface modeling is one reason Aerotas deliverables are easier to use in real CAD workflows. The point is not just to preserve data density. The point is to create a faithful working surface that supports contours, drafting, and design decisions.