Highway Bypass Corridor Survey
50km of topographic and geodetic corridor control for highway design.
View DetailsRiverside District Terrain Model
Digital Mapping & LiDAR Scanning — Riverside District, for the Riverside Planning Office.
Project Overview
A Whole District, Mapped in Days
The Riverside Planning Office needed current, high-resolution terrain intelligence across 500 hectares of dense urban fabric — rooftops, streets, parks and waterways — to feed zoning, drainage and transport models.
Our drone LiDAR teams flew the district in coordinated blocks, penetrating tree canopy and urban clutter to capture true ground. The result: a district-wide elevation model accurate enough for engineering design.
Challenge & Approach
Density, Canopy, Deadlines
The challenge: photogrammetry alone can't see ground through trees and hits limits between tall buildings. The planning team also needed data in weeks, not the months a ground survey of this area would take.
The approach: LiDAR penetrated canopy to reach true ground, while oblique imagery textured a 3D city model. Flights ran at dawn to avoid crowds and heat haze, with 120 ground checkpoints securing accuracy across every block.
Deliverables
What the Client Received
- Classified LiDAR point cloud: 40+ points per square meter, ground and non-ground separated
- 0.5m Digital Elevation Model with 0.25m contours for drainage modeling
- 3cm orthophoto mosaic of the full 500 hectares, color-balanced
- 3D textured mesh of priority precincts for visualization and consultation
- Building footprint and vegetation layers extracted for the city GIS
- Independent accuracy report: vertical RMSE verified against checkpoints
500ha
District mapped by air
40+/m²
LiDAR point density
120
Ground checkpoints
3cm
Orthophoto resolution
Related Work
Farm Estate Boundary Survey
2,500-hectare GPS RTK subdivision for legal land certificates.
View DetailsDrone Survey Service
The LiDAR methods behind this district map, as a service.
Learn morePlanning a precinct, campus or city?
Send the boundary and required accuracies. We'll plan the flight blocks and price it.