Contour Survey
Contour generation at engineering intervals for drainage, road profiling and earthwork.
LiDAR gives you a measured three-dimensional record of a site rather than an interpretation of it. We operate terrestrial, vehicle-mounted and UAV-mounted scanners, choosing the platform by the shape of the job: a road or drain corridor is captured mobile, a dense market area terrestrially, and a whole ward from the air.
Every dataset is registered to GNSS-observed control, classified to ASPRS conventions, and validated against independent check points that were not used in the adjustment. The accuracy report that ships with the data states what was achieved, not what was promised.
What you receive
- Classified point cloud in LAS 1.4 or LAZ, with ground, vegetation, building, utility and noise classes separated
- Bare-earth digital terrain model and digital surface model as GeoTIFF
- Contours at your chosen interval, with breaklines, delivered as DWG and SHP
- Cross-sections and longitudinal profiles along corridors on request
- Volumetric computation for stockpiles, borrow pits and dump sites
- Independent check-point accuracy report and control register
Specification
Point density
8–100 points per square metre, set by platform and flying height
Vertical accuracy
±3–5 cm against independent check points
Horizontal accuracy
±5–8 cm, GNSS/CORS-tied
Platforms
Terrestrial static, vehicle-mounted mobile, UAV-mounted
Classification
ASPRS standard classes; custom classes on request
Output formats
LAS 1.4, LAZ, GeoTIFF, DWG, DXF, SHP
Typical turnaround
10–25 working days for a ward-scale block, from mobilisation
Typical applications
- Road and drain corridor design
- Utility and asset inventory
- Digital twin base geometry
- Earthwork and volume estimation
- Flood modelling terrain input
- Heritage and structure documentation
Need the data instead?
If a survey is more than the job requires, the data store lists 84 licensable imagery, elevation and vector products.
Related services
3D Modelling & Digital Twin City
CityGML city models, textured meshes and streamable 3D Tiles.
Total Station Survey
Control network establishment and detailed topographic pickup for DPR-grade drawings.
Planning a lidar survey?
Send the site extent and the accuracy you need. We will come back with a scope, a deliverable list and a price.