Harrison Grierson’s surveying and spatial practice includes UAV capture, LiDAR, photogrammetry, high-definition laser scanning, aerial imagery, terrain models and 3D point clouds. Its published service description explicitly provides outputs for CAD, GIS and BIM workflows.
The firm’s 2021–2025 work with Selwyn District Council on the Future Selwyn Spatial Plan included advice on a GIS portal, spatial metrics and data-led monitoring. This places a long-established surveying and engineering consultancy within the modern GIS, reality-capture and spatial-planning market.