STA 0+000basinRL 71.85m
South basin
Standing water after 12mm of rain. The soakaway on the old drawing does not exist.
STA 0+000E 412350.00 N 298110.00 RL 71.85Leg 01 / Plan
Land survey and site analysis
The ground does not argue.
We measure sites before anyone draws on them. Boundaries, levels, drainage falls, the awkward corner nobody wants to admit is 400mm out. You get the survey, the model, and a straight answer about what it means.
A / Four legs, one traverse
- 01
Control
Two benchmarks set, levelled, and closed to within 4mm before a single detail point is taken. Everything after this hangs off them.
- 02
Detail
Boundaries, levels, drainage, services, canopy spread, and the things nobody thinks to ask for until the ground is opened up.
- 03
Reduction
Raw observations reduced, checked against the closure, and any point that disagrees with its neighbours re-observed rather than averaged away.
- 04
Issue
A drawn survey, a point cloud where it earns its keep, and a written note on what the ground will make difficult.
B / Transects
Four cuts across the site, south to north. Each one is a line on the drawing behind this text, and each is tethered to the ground it describes.
STA 0+240plateauRL 78.40m
Middle terrace
Flat to 60mm across 90 metres. The only part of this site that will not need cut and fill.
STA 0+415scarpRL 83.10m
Boundary scarp
A 4.6m step, and the legal boundary sits at its toe, not its crest as registered.
STA 0+620ridgeRL 89.75m
North ridge
Bedrock within 700mm. Foundations here are a different price to foundations anywhere else.
C / What the numbers come from
- Robotic total station
- 1 second, 1mm + 1.5ppm
- Digital level
- 0.3mm per kilometre, double run
- GNSS rover
- Network RTK, 8mm horizontal
- Terrestrial scanner
- 2mm at 25m, registered to control
4mm
Worst traverse closure last year
312
Sites surveyed since 2009
0
Boundary findings overturned in court