Vermessung AVT-ZT-GmbH offers services in the fields of mapping, cadastral surveying, engineering geodesy, aerial and terrest ... rial photogrammetry, laser scanning and geographic information systems. Together with our subsidiary AVT-Airborne Sensing , AVT carries out photo flights in Europe and uses the images to model the terrains, alpine environments and cities and to produce orthophotos with ground resolution up to 2 cm. read more