Topographic Survey
Ground elevation captured across the whole site, delivered as a DEM/DTM to your coordinate reference system of choice.
DEM/DTM · OSGB36 / BNG
Digital surface model · 1.85 cm ground sample distance
Aerial Surveying & Mapping.
Topographic survey, orthomosaic mapping and site-progress monitoring — for construction, land and coastal projects.
Our own survey data — ground surface as measured height
See it before you buy it. Twenty minutes, in person or on a call — we open a live survey in the browser, show you what it produces, and then show you the ground control and accuracy behind our own flying. You judge the method, then decide whether it is worth paying for.
Book a demonstrationWhat's included
Three surveys, one flight plan.
Most jobs combine two or three of these from a single site visit.
Orthomosaic Mapping
Geometrically corrected, true-to-scale aerial imagery stitched into a single site-wide map.
GSD ≈ 2–4 CM/PX · 70–80% OVERLAP
Site Progress Monitoring
Repeat flights on the same flight lines, overlaid to track earthworks, stockpiles and build progress over time.
REPEAT SURVEY · VOLUMETRIC CHANGE
Your deliverable
What you receive.
A live, measurable site model in your browser — with the survey files supplied alongside it.
The whole site, measurable, in a browser.
Surveys are delivered through our own client portal. Open the site, take a section anywhere along a road or excavation, check a level, measure a distance — without a GIS seat, a CAD licence or anything to install.
Because each survey sits alongside the last, progress becomes something you can show rather than describe.
- Cross-sections anywhere you need one Taken across a road, a channel or an excavation, at any chainage.
- Levels, distances and areas on demand Measured directly off the model, without another site visit.
- Progress you can evidence Survey against survey, or against the design surface, shown as change.
- Issued in your coordinate system OSGB36 / British National Grid as standard, or whatever your team works in.
- Share it with a link Client, contractor, planner or funder — no software for them to buy.
Output formats
Orthomosaic Map
GEOTIFF · JPEG
DEM / DTM
CONTOUR INTERVAL 0.5M
Topographic Drawing
DWG/DXF · SPOT LEVELS
Progress Series
DATE-STAMPED · OVERLAY COMPARISON
Defensibility is not determined by the absence of error, but by the precise measurement, statistical proof and transparent documentation of that error.
From our own survey flight
One flight. Two products.
The same parkland, captured once on a 6.5-hectare estate survey — delivered as a true-colour map and as measurable height.
Both come from the same set of overlapping images, flown on one of our own survey jobs. Ground sits around 172 m and the site carries roughly 25 m of range across it — every field undulation held as measurable height rather than a picture of one.
Marine, harbour & coastal
Coast and quayside, measured the same way twice.
Harbour authorities, marinas, sailing clubs and coastal landowners buy the same thing construction buys — a figure that holds up — for different reasons.
Retreat as a distance, not a description
Cliff retreat along parts of the Island’s south coast runs at over a metre a year, with century-scale records above two. Flown on the same control each time, the change between surveys is a measured distance and a measured volume — the form a trustee, an insurer or a regulator asks for.
REPEAT SURVEY · SAME CONTROL · MEASURED CHANGE
Structures you cannot easily get to
Quay walls, revetments, groynes, slipways, piles and pontoons, recorded close-range without a boat, a cherry picker or a low-water scramble. Useful as a condition record, and as dated evidence of what a storm actually did.
ASSET CONDITION · STORM EVIDENCE · NO ACCESS EQUIPMENT
Volumes once they are ashore
Dredged arisings, beach recharge and bunded material are all volumes somebody is invoicing against. Measured from the air on the same baseline each time, to the same 1–3% as any other stockpile.
ARISINGS · RECHARGE · STOCKPILE VOLUMES
What we will not claim. A camera cannot see through water. We measure what is dry or exposed — the intertidal at low water, the structure, the material once it is landed. Surveying the submerged bed needs sonar, and we will tell you that rather than sell you a survey that cannot see it. Being already on the Island is what makes a short-notice tide window, or a re-fly after a storm, worth asking for. More on who we work with →
Why drone mapping
Drone survey vs. traditional survey.
Where an aerial photogrammetric survey outperforms a conventional ground survey.
| Factor | Traditional ground survey | LAM aerial survey |
|---|---|---|
| Time on site | Multiple visits, often days for larger sites | Single flight session, typically hours |
| Site access & safety | Personnel on foot across the whole site, including unstable ground or live plant areas | No one needs to physically access hazardous or restricted ground |
| Coverage | Discrete surveyed points and cross-sections | Continuous coverage — every square metre of the site captured |
| Deliverables | 2D drawings, spot levels, written reports | Orthomosaic, DEM/DTM & topographic drawing |
| Accuracy | Survey-grade, dependent on method & equipment | Better than 60 mm horizontal, 44 mm RMS, measured against withheld check points — Emlid Reach RS4 ground control & RTK positioning ¹ |
| Cost driver | Scales with crew time and number of site visits | Scales with site size and deliverable complexity ² |
Get in touch
Need a site surveyed or mapped?
Tell us the site size, coordinate system and what you need delivered — we'll come back with availability and a price.
Request a Quote