9 Devices for measuring, computing and displaying information relating to rail tracks and its surroundings including signalling of rail tracks, namely, computers, computer monitors, LCD displays, distance measuring apparatuses and cameras for rail inspection; electro-mechanical data processors; data processing accessories, namely, microprocessors; processors, namely, electronic circuit boards for computers to perform the instructions of a computer program by means of specified instructions of basic arithmetic, logic, control and input/output operations; data processing apparatus; measuring instruments, namely, distance measuring apparatus, lasers for distance measurement and optical apparatus and instruments in the nature of cameras; detecting instruments, namely, detectors of rail tracks and their surroundings, in the nature of, laser scanners for industrial inspection; monitoring instruments, namely, IMU (Inertial Measurement Unit) comprised of accelerometers, gyroscopes and magnetometers for measuring and reporting data on railroad track systems; indicators, namely, heading indicators, railroad track geometry indicators, railroad track signaling indicators, railroad positioning indicators; electrical controllers; downloadable computer software for database management, for electronic storage of data and for processing data collected related to railroad tracks and their surroundings; downloadable data collection software; downloadable software for 3D mapping of entire railway corridor, including track, overhead lines, switches and crossings, cable cars, track bed, earthworks and structures; Downloadable cloud-computing software for delivering an accurate and dynamic 3D virtual model of rail tracks and surroundings; downloadable software for 3D digital asset management which combines 3D measurement, data management and web services; disruptive technology, namely, 3D corridor monitoring track position measurement that applies remote sensing and cloud computing to model overhead line networks; downloadable software used to monitor and maintain companies assets effectively and efficiently to optimize performance and reduce risk; downloadable and recorded computer programs for use in the capture, storage, retrieval, access, manipulation, editing, network transmission, streaming, deployment, distribution, conversion, encoding, decoding, compressing, data compression, and viewing of data, metadata, images, light-scattered data, remote sensing data, altimetry data, optical sensing data, within a closed system; downloadable computer programs for use in database management