Mapry Releases Accuracy Verification Results for Closure Error and Reproducibility of 3D LiDAR Scanner mapry LA03-1

Mapry, Inc. (Head office: Tamba City, Hyogo Prefecture; Representative Director: Keiji Yamaguchi) has conducted and released the results of accuracy verification for closure error and reproducibility of its 3D measurement LiDAR scanner, the mapry LA03-1. The verification was carried out on measurement routes of approximately 300 meters, 500 meters, and 1,000 meters. The 300-meter route recorded a closure ratio of 0.01%, while even the long-distance 1,000-meter route achieved an extremely stable closure ratio of 0.08%. These results confirm that, despite being a low-cost LiDAR with a base price of 397,000 yen before tax, the device offers an accuracy level suitable for broad practical use in surveying and civil engineering sites. The mapry LA03-1 is a LiDAR scanner developed to make 3D data acquisition easy in the field. This verification aimed to objectively measure, by distance, the accuracy of the SLAM algorithm alone and the reproducibility achieved when applying loop closure, a software-based optimization process. The tests were conducted outdoors near the company building and in a forest environment. Routes were set to start measurement from an initial position and return to the same point. Fixed objects such as walls and equipment were used as targets, and closure error was measured based on the XYZ differences between point clouds from the first pass and the revisit. The closure ratio was then calculated from those values. Across all measurement distances, applying loop closure confirmed that the point clouds matched with extremely high accuracy. Stable results were also obtained using SLAM alone without correction processing. The measurement results were as follows. On the approximately 300-meter route, with loop closure, closure error was about 0.02 to 0.04 meters and the closure ratio was 0.01% to 0.02%; without loop closure, closure error was about 0.01 to 0.55 meters and the closure ratio was 0.01% to 0.24%. On the approximately 500-meter route, with loop closure, closure error was about 0.12 meters and the closure ratio was about 0.02%; without loop closure, closure error was about 0.28 meters and the closure ratio was about 0.06%. On the approximately 1,000-meter route, with loop closure, closure error was about 0.80 meters and the closure ratio was about 0.08%; without loop closure, closure error was about 0.87 meters and the closure ratio was about 0.09%. The verification demonstrated that the mapry LA03-1 not only provides highly stable standalone SLAM performance, but also, when used together with loop closure processing, can keep error under one meter even over measurement distances of up to 1,000 meters while ensuring high reproducibility. In particular, at practical measurement distances of around 300 meters, the error was kept to just a few centimeters. This clearly confirms the device’s practicality in accuracy-demanding field applications such as forest resource surveys and broad-area current-condition assessment in civil engineering, including terrain surveys and base data for earthwork volume calculations. Based on these results, Mapry confirmed that the LA03-1 has sufficient accuracy for use from small-scale sites to wide-area sites of around 1,000 meters, not only for forest surveys but also for approximate surveying and 3D modeling of current conditions at civil engineering sites. Mapry will continue developing and providing solutions that enable anyone to easily acquire and use high-precision 3D data. For product inquiries or applications, please contact: https://mapry.co.jp/contact/ Mapry provides services for people involved in surveying, forestry, disaster prevention, agriculture, and construction. The company offers solutions that make it easier to acquire, analyze, and use 3D data, which had previously posed high barriers due to equipment costs and the difficulty of device operation and analysis. Company name: Mapry Inc. Location: 165 Tada, Kasuga-cho, Tamba City, Hyogo Prefecture, Japan. Representative: Representative Director Keiji Yamaguchi. Website: https://mapry.co.jp/. Contact for this matter: info@mapry.co.jp.