Photogrammetry turns high-resolution aerial imagery from drone flights into dense digital twin models and georeferenced orthomosaic maps. These outputs give construction and O&M teams centimeter-accurate measurements of terrain, structural positions, and panel placement. Unlike manual surveys, photogrammetry captures the full site in a single pass using multiple UAVs or off-the-shelf drones, producing datasets that can be directly overlaid against CAD/BIM design files to automatically flag deviations.