Project overview
A detailed topographic survey for Warsamson Dam combining LiDAR, total-station, and GPS methods. Outputs included validated elevation data, terrain models, contours, and maps for planning, construction, and operation.
The project challenge
Dam planning required reliable elevation and site information across terrain that could not be represented adequately by one survey technique alone.
Technical approach
- Planned the integration of LiDAR, total-station, and GPS observations around required coverage and control.
- Reviewed survey control, coordinate reference, coverage, density, and the relationship between terrestrial and airborne data.
- Processed and classified elevation information for terrain and surface products.
- Generated models, contours, profiles, and mapping required by the engineering team.
- Checked consistency between control, point cloud, surfaces, contours, and final map layouts.
Key deliverables
- Survey-control information
- LiDAR and terrestrial survey package
- DTM/DSM and elevation products
- Contours and topographic maps
- Profiles, sections, and GIS/CAD outputs
Decision value
- A stronger terrain basis for dam planning and design
- Complementary coverage from several survey methods
- Consistent elevation products for engineering use
- A reusable geospatial foundation for later project stages
QUALITY & INTERPRETATION
Quality assurance considers control, coordinate systems, checkpoints, point density, classification, surface artefacts, contour behaviour, and cross-deliverable agreement.
