| Summary: | The generation of a 3D model using a sensor-driven approach such as terrestrial laser scanning will involve a large amount of data. This situation will cause the process of producing the 3D model needs a period. At times, the 3D model is not completed because the computer system used cannot accommodate with the process involved. Considering the existence of this matter in the production process of the 3D model, a subsampling process was developed with the aim of reducing the density of point cloud data with the approach of reducing the distance between the points of the point cloud. A question arises; will this subsampling process cause the 3D model produced to be unable to resemble the actual appearance of 3D objects in the real world? Therefore, this paper will report the findings of a study on the effect of the subsampling process on the production of 3D models. This study involves an archeological monument over 150 years old, built using the technique of stacking rocks of various shapes and sizes, which according to historical factors is known as a charcoal chamber. The study also looks at how this subsampling process can be done on the original data without removing the true shape of the documented 3D object. That is because the actual shape of the 3D model of the object contains historical characteristics that are the focus of this documentation work. In general, this study can prove that the subsampling process to point cloud data produced from terrestrial laser scanner equipment should be done carefully because it will involve the quality of the 3D model that will be produced. The situation becomes more serious if the scanned object consists of a complex building structure such as a coal chamber. However, the subsampling process can still be done, and the object’s actual shape can still be produced in the 3D model. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
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