# Enhancing Photogrammetric Digital Surface Models with Pretrained Diffusion Models and Multimodal Conditioning > Source: > Published: 2026-09-28 09:00:04+00:00 Large-scale Digital Surface Models (DSMs) can be produced cost-effectively from satellite images via stereo-photogrammetry. However, the resulting 3D maps are often contaminated by noise, outliers, and voids. On the other hand, aerial LiDAR provides high-accuracy elevation measurements at a substant