Abstract
Nowadays it is possible to measure accurately dense point clouds either with aerial/terrestrial laser scanning systems or with imagebased
solutions (namely based on photogrammetric computer vision algorithms such as structure-from-motion (SfM)), from which
highly detailed 3D models can be achieved. Besides, direct tools in the form of simple devices such as rulers, compass and plumblines
are usually required in simple metric surveys, as well as high-end surveying and geodetic instruments such as robotized imagebased
total stations and GNSS (probably to a lesser degree but still required) to set the archaeological/architectural recording project
in a global reference frame. With all this gamut of image-based and range-based sensors and datasets (in the form of coordinates,
point clouds or 3D models), in different coordinate systems (most of the times local for each device), lack of uniform scale,
orientation and levelling, the fusion of data tends to be cumbersome. This paper presents an efficient way to fuse and merge different
datasets in the form of point clouds/3D models and geodetic/UTM coordinates. The new developed 3DVEM Register GEO
software is able to handle datasets coming from both direct and indirect methods in order to provide unified and precise deliverables.
