## 1 Introduction
On the other hand, this model may contain geometric inaccuracies that must be verified, so the model obtained through TLS helps us to verify the quality of the model through SfM. On the one hand, this model obtained through TLS is less complete due to the physical limitation of access to roofs, which causes phantom zones, but, on the other hand, it is a much more reliable model in terms of precision, since we know the millimeter precision and it helps us to control and validate the results. Ground photogrammetry was more accurate, but has the same limitation as three-dimensional models obtained by TLS. Aerial photogrammetry is less accurate, but reduces the number of ghost zones to almost 0. Figure 1: Labor process: “from the physical to the digital and anchor from the digital to the physical”: (**a**) Capture of the physical monument using new technology (**b**) Elaboration to generate digital gemelli of our heritage (**c**) Obtain physical gemelli from new technology. In the geometric validation procedure, we obtain two point clouds. To scale and orient them, we used the RECAP platform to facilitate and guarantee the transition to BIM (Building Information Modeling), in our case, on the REVIT platform, since both belonged to the Autodesk set of tools, where interoperability was guaranteed. The point cloud obtained using Agisoft Metashape is in a *.psx format. The *.psx format is not compatible with RECAP, so we need a previous step in which we modify the format of our file to a format suitable for RECAP. In the case of the cloud obtained through TLS, there is no problem since we use the cyclone software to process the data obtained through the BLK360 laser, which allows us to export and resample our point clouds in formats compatible with RECAP. In this way, the cloud of points was obtained in Metashape. To do this, we exported from.psx to.laz. The.laz format, as we have said, is compatible with the RECAP program and allows us to load that cloud, process it, classify the points, etc. Once these accessions have been made, the next step is to link the cloud in REVIT. Figure 2: (**a**) Aerial view of the Aver tower, (**b**) view of the fortified complex from the intrados of the canvas. In the foreground tower of the Aver, (**c**) cube of the Aver. Trasdős of the canvas, (**d**) aerial view of the Ochavada tower, (**e**) plan of the study area. Right canvas, colored in red, cube and Ochavada tower. Left canvas, colored in orange, cube and tower of the Aver. The next step will be carried out within the REVIT platform. With the point cloud in RECAP format, we will proceed to link it in REVIT. We will call this cloud of points 1 A. We can have as many as we want, for example, 1 A, 1 B, 1 C, etc. Using homologous points, we will proceed to position these clouds in the model space, making them overlap. According to what was seen in the article \"Protocol Development for Point Clouds, Triangulated Meshes and Parametric Model Acquisition and Integration in an HBIM Workflow for Change Control and Management in a UNESCO's World Heritage Site\" [1], we will proceed to make a chromatic differentiation of each of the point clouds to easily visualize geometric differences. We will proceed to an analysis through sections, elevations, and plans at different levels. This analysis is carried out quickly in REVIT, allowing us to measure and obtain fast and reliable data about the quality of our models, being able to discard entire models or parts of them if necessary. With this system, the level of precision is analyzed correctly.