This thesis presents the development of a prototype device for spatial measurement in underground caves, aiming to address the lack of suitable instruments in speleology. Because the market is small and producing a robust and precise measuring device is demanding, no company currently offers such a product. To generate a spatial model, the device must accurately capture spatial survey readings consisting of orientation (azimuth), inclination, and distance. These parameters are derived from data provided by a magnetometer, accelerometer, and laser distance meter. The prototype uses widely accessible components, enabling anyone to continue its development. The thesis describes the hardware components, the software and the test results. The final result is a functional prototype that meets the defined objectives. Although it is not yet suitable for use in underground caves, it is currently being used to measure simple indoor rooms. The prototype provides a solid foundation for those wishing to develop a finished product.
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