Stalać–Kraljevo–Rudnica Integrated Railway Geodetic Survey
From millimetre-level railway control to multi-sensor, design-ready corridor data.
A formally accepted 148.9 km railway geomatics reference linking engineering control, airborne/mobile LiDAR, photogrammetry, tunnel and river surveying, and 1,125 ha of design-ready terrain and topography.
The two railway packages are presented as one connected portfolio reference, while their documented quantities and QA evidence remain separated by work package.
One railway corridor. Two connected geodetic work packages. Very different terrain.
The reference connects Stalać–Kraljevo in the West Morava valley with Kraljevo–Rudnica through the constrained Ibar valley. The engineering baseline had to remain consistent while the corridor moved from relatively open terrain into mountains, bridges, river crossings and tunnels.
The corridor starts with a reliable geodetic reference
Static GNSS, precise levelling, railway control recovery, new stabilized points and tunnel control created the reference framework used by airborne, mobile and terrestrial acquisition.
Airborne, mobile and terrestrial methods were combined instead of forcing one sensor to do everything
Airborne imagery and LiDAR established continuous corridor context, while rail-mounted mobile mapping and targeted field measurements closed gaps at structures, stations, tunnels and watercourses.
Direct riverbed measurements where the Ibar could not be captured reliably from the bank
The Kraljevo–Rudnica package required field completion on 27 smaller watercourses as well as the Ibar and Jošanica rivers. On the fast-flowing Ibar, the team worked from the banks, inside the channel and from an inflatable boat to complete riverbed and crossing geometry where aerial or bank-only observation was not sufficient.
This was one of the most operationally demanding parts of the survey: current, exposed rock, limited sight lines and railway structures all had to be handled while preserving engineering-grade geometry.
Mobile mapping extended the survey into GNSS-denied railway environments
Tunnel control networks, precise total-station observations and rail-mounted mobile scanning were combined to capture railway geometry where satellite positioning and airborne methods could not provide complete coverage.
From measured corridor to design-ready terrain and topography
The multi-source observations were processed into georeferenced orthophoto, DTM/TIN and structured 1:1,000 CAD topography for preliminary design and downstream railway engineering.
Engineering geodetic networks
Operational railway control with coordinates, heights, descriptions and adjustment reports.
2 corridor networksDigital orthophoto
Georeferenced orthophoto for both work packages.
TIFF/TFW; ECW · 328 + 398 sheetsDigital Terrain Model
Terrain, top-of-rail and combined engineering variants.
DWG 2010 · 575 ha + ~550 haDigital topographic products
1:1,000 structured railway engineering topography.
1:1,000 · DWG 2010 · Two work packagesTunnel and field-completion datasets
Mobile-LiDAR/tunnel content plus stations, culverts, structures and watercourse completion.
CAD / point-cloud datasetsGeodetic designs and realization studies
Design and final technical books with annexes, registers and QA traceability.
DocumentationMillimetre-level control underpins metre-scale corridor complexity
Final studies document network adjustment, trajectory and point-cloud processing, aerial triangulation, terrain and orthophoto checks, and final CAD/source traceability.
QA covered instrument certificates, complete-network GNSS/levelling adjustment, aerial equipment and image/trajectory checks, aerial-triangulation statistics, terrain/parallax/control review, breakline editing, orthophoto coordinate/mosaic/radiometric control and final CAD/source-traceability checks. Stalać–Kraljevo final 3D adjustment reports RMS 4.3 mm X, 4.3 mm Y and 1.8 mm H; WB24 aerial-triangulation GCP RMS is 0.026 m X, 0.023 m Y and 0.015 m H.
What this project proves
This formally accepted reference proves MapSoft can deliver a railway geomatics subcontract package from engineering control through multi-sensor acquisition, photogrammetry, mobile/tunnel scanning, terrestrial gap closure, DTM/topographic production, documented QA and engineering handover across long and varied operational corridors.
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Talk to MapSoft about engineering control, airborne and mobile mapping, difficult-access field survey and design-ready geospatial products.