Have questions regarding legal boundary status, NZVD2016 vertical datums, drone flight permissions, or software compatibility? Everything is outlined below.
No. Ground Spatial provides spatial due diligence, pre-design constraint modeling, and 3D daylight recession envelopes. Under the Cadastral Survey Act 2002, legal boundary pegging for Landonline title registration must be executed by a Licensed Cadastral Surveyor (LCS).
We recommend our audit on Day 1 of concept feasibility so your architectural team can verify building footprints, council 3-waters setbacks, and ground contours without waiting 4 weeks on a traditional survey measure-up. When construction commences, an LCS can be engaged specifically for final foundation pegging.
All boundary lines are harvested via API directly from Land Information New Zealand (LINZ) Landonline Digital Cadastre (Layer 50772) in EPSG:2193 (NZTM2000). We overlay these legal title lines onto sub-centimeter photogrammetry to show where physical fences, eaves, or retaining walls deviate from legal records.
All elevation models and 0.25m / 0.10m bare-earth contours are referenced to the New Zealand Vertical Datum 2016 (NZVD2016), which is the official datum required by Christchurch City Council for resource consents, flood management compliance, and Finished Floor Level (FFL) sign-off.
If your architectural office still works in legacy Lyttelton 1937 Vertical Datum (+9.00m benchmark offset), we can supply dual-annotated CAD levels on request.
On our Full Field Audit ($950), our RTK GNSS receiver base station network achieves <15 mm vertical accuracy and <10 mm horizontal accuracy across hard surfaces (concrete, asphalt, building slabs). Ground sampling distance (GSD) is under 1.0 cm/pixel.
Yes. Every Master CAD package is provided in standardized 2D/3D DXF, DWG, and point cloud formats. We include a local metric origin benchmark tag (e.g. 0,0,0) tied to NZTM2000 coordinates so your Revit project base point locks in with zero coordinate clipping.
Check our step-by-step guide: Importing Point Clouds into Revit & ArchiCAD →
We generate 3D CAD meshes representing the parametric hip-roof envelope permitted under Christchurch District Plan Chapter 14 (45° south slope, 55° north/east/west slopes, with 11m/12m height caps). Your massing model can sit inside this envelope in 3D to verify compliance in real time.
We fly strictly under Civil Aviation Authority (CAA) Part 101 rules using ultra-lightweight sub-250g commercial drones. We log our flight missions with Airshare. For residential due diligence, we operate over public road reserve or obtain property owner permission where physical site access is required.
All neighbor dwellings and private property are handled with high confidentiality and anonymized in client dossiers.
While Canterbury is prone to northwest gusts, our lightweight UAVs operate safely up to 25 knots. In the event of torrential rain or gale winds, we immediately notify your team and reschedule the mission for the first safe morning window, maintaining transparency throughout.
Need advice on an unusual site constraint, Council 3-Waters easement, or complex hillside slope? Drop us a line below.