Narrow space surveying and mapping is of high importance for many applications. with the demand for digital 3D models in a low-cost and relatively fast way growing rapidly. This paper examines SLAM-based and image-based mapping systems for indoor mapping and focuses on the comparison of the 3D point clouds acquired from two commercial mapping systems. Leica BLK2GO and Matterport Pro2 ... https://www.nacrack.com/huge-sale-Moondrop-Quarks-quick-choice/