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Oblique 3D point-cloud view showing settlement, terrain and vegetation captured for the river-basin survey.

MAPSOFT · 2024–2026

Krupanj / Likodra River Basin

Geospatial Survey for Flood & Erosion Protection

Krupanj / Likodra combines 1,882 ha of Phase 1 airborne mapping, 408 river cross-sections and 71 bridges with a 2026 UAV follow-up over 26 priority polygons and 3 cm orthophoto.

LocationMunicipality of Krupanj; Likodra River Basin, with the Bogoštica sub-basin as the Phase 2 detailed focus
Client / programme contextPLANET S.A. Societe Anonyme For Provision of Consultancy Services
MapSoft roleSpecialist geodetic / photogrammetric subcontractor to PLANET S.A., providing the geospatial survey and engineering-data foundation across both project phases.
Project context

A basin-scale geospatial foundation for flood and erosion engineering

The Likodra River Basin project required one consistent engineering reference across steep, heavily vegetated terrain, river channels, bridges and local design areas. MapSoft delivered the geospatial survey foundation used by the wider design team, without claiming responsibility for the hydrodynamic model or protection design itself.

1,882 haPhase 1 survey footprint
408 cross-sectionsRiver cross-sections
71 bridgesBridge surveys
3 cm/pixelPhase 2 orthophoto
Satellite context map showing the distributed project coverage around Krupanj, Likodra and surrounding tributaries.
Likodra River Basin project context and survey corridors
Airborne mapping

Large-area LiDAR and imagery established the first engineering baseline

Phase 1 combined mission planning, airborne LiDAR, aerial photography, trajectory processing and photogrammetric production over 1,882 hectares. The result was a common spatial base for terrain, imagery and hydraulic field measurements.

Flight-line layout showing how airborne coverage was organized across the elongated river-basin survey area.
Airborne LiDAR / imagery flight planning over the area of interest
Production-screen example from aerial imagery processing and quality review.
Aerial image processing and photogrammetric production
Cross-section view separating the terrain surface from vegetation and above-ground returns during point-cloud classification.
Classified point-cloud cross-section
01Establish project datum and control
02Acquire basin-scale airborne LiDAR and imagery
03Measure hydraulic sections and structures terrestrially
04Produce Phase 1 DTM and 5 cm orthophoto
Terrain production

Point-cloud classification was turned into a terrain model that could support engineering design

Dense elevation data were classified and edited into engineering DTM/TIN products. The terrain model preserves steep slopes, gullies and river morphology while removing vegetation and above-ground objects from the ground surface.

Engineering terrain representation prepared from classified elevation data for downstream design work.
Engineering DTM / TIN overview
Triangulated terrain detail showing the engineered ground surface around river channels and steep valley morphology.
DTM / TIN terrain detail
Hydraulic geometry

River sections and structures were measured as engineering geometry, not just mapped as objects

The Phase 1 survey included 408 river cross-sections, 71 bridge surveys and two embankments. Structure geometry, profiles and supporting attributes were prepared so the wider hydraulic and flood-protection team could use them directly in downstream workflows.

Combined field photograph, interpreted structure geometry and profile output illustrating the bridge-survey workflow.
Bridge survey and profile workflow
408River cross-sections
71Bridge surveys
2embankments surveyed

Provide current terrain, imagery, river cross-sections, bridge/embankment geometry and detailed local topography for downstream flood/erosion protection analysis and design, without claiming responsibility for the hydrodynamic model or protection design itself.

Targeted follow-up

The second phase increased detail only where the design needed it

Existing 2024 data were reused where they were adequate. Twenty-six priority polygons in the Bogoštica sub-basin were then supplemented with new UAV LiDAR/RGB, 21 orientation points, 3 cm orthophoto and detailed 1:500 / 1:1,000 topography.

Orthophoto excerpt showing the detailed local mapping product prepared for priority design areas.
High-resolution orthophoto product example
26 polygonsPhase 2 target polygons

Approximately 67 ha total.

3 cm/pixelPhase 2 orthophoto

Eight location-based maps.

21 pointsPhase 2 permanent control

8 concrete monuments + 13 metal bolts.

05Reuse adequate Phase 1 data and survey gaps with UAV
06Produce 3 cm orthophoto and detailed 1:500/1:1,000 plans
07Validate geometry, topology and cross-phase consistency
Documented quality

Quality control was measured, plotted and carried through both project phases

Strip fit, trajectory quality, aerial triangulation, orthophoto checks and control-point height differences were documented numerically. Final vector data were also checked for geometry, topology, attributes and visual consistency.

Mapped quality-control visualization used to review LiDAR point-density coverage across the project area.
Point-density quality-control overview
Trajectory-processing quality plot documenting the heading solution during acquisition processing.
Trajectory heading accuracy / quality plot
Height-offset plot comparing GNSS-measured LiDAR control fields with the processed point cloud.
Height deviation of GNSS control measurements from the LiDAR point cloud

Phase 1 LiDAR strip-fit analysis used 6,226 roof lines and reported RMS East 0.014 m, North 0.014 m, Height 0.011 m and horizontal 0.020 m. Phase 1 DTM control had 3.6 cm standard deviation. Phase 2 aerial-triangulation RMSE across five blocks ranged from 0.2–1.1 cm in Y, 0.4–1.1 cm in X and 0.1–1.5 cm in Z; orthophoto maximum deviations were 3.3 cm Y and 2.8 cm X. Final vector data underwent geometry, topology, attribute-domain and visual checks.

Engineering outputs

From airborne capture to CAD/GIS-ready terrain, imagery and hydraulic geometry

The delivery combined orthophoto, DTM, classified point clouds, hydraulic sections, structure surveys and detailed local plans into one coherent spatial reference for downstream design.

01

Phase 1 digital orthophoto

Basin-scale orthophoto for the 1,882 ha survey.

5 cm/pixel · TIF + TFW / ECW · 177 sheets
02

Phase 1 Digital Terrain Model

Engineering DTM supplied as CAD and 0.5 m raster outputs.

0.5 m raster outputs · DWG / GeoTIFF / ESRI ASCII
03

Hydraulic cross-section package

Measured river sections structured for downstream hydraulic use.

1:100 profiles · DWG / SHP / Excel · 408 cross-sections
04

Bridge and embankment survey package

Bridge profiles, geometry, spatial/tabular data and photographs; embankment profiles.

DWG / SHP / Excel · 71 bridges; 2 embankments
05

Phase 2 classified LiDAR point cloud

Georeferenced ground/non-ground point cloud after automatic and manual verification.

LAS
06

Phase 2 detailed orthophoto and plans

3 cm orthophoto plus 1:500 and 1:1,000 plans; selected 1:2,500 areas include orthophoto and DTM.

World TIF + TFW / ECW / DWG · 26 target polygons
Basin-scale terrain plus hydraulically relevant channel/structure measurements
2024 spatial foundation reused in the 2026 detailed phase
3 cm UAV follow-up at priority locations
Engineering-ready CAD/GIS outputs for downstream design
Oblique 3D point-cloud view showing settlement, terrain and vegetation captured for the river-basin survey.
What this project proves

Multi-phase geospatial continuity for flood and erosion engineering.

Krupanj / Likodra proves MapSoft can combine airborne LiDAR/photogrammetry, UAV LiDAR, GNSS/total-station survey, hydraulic cross-sections, structure surveying and multi-scale engineering mapping in one coherent reference framework over multiple project phases.

1,882 ha Phase 1 survey408 river cross-sections / 71 bridges26 Phase 2 target polygons3 cm Phase 2 orthophoto

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