Orthomosaic map
A single, measurable top down image, accurate to a few centimetres with ground control.
From ₦150,000 plus ₦18,000 per hectare
Section 01 · Surveys
Measured from above
Orthomosaic maps, terrain models, contours and volumes for land, estates, roads, farms and quarries. Fast in the field, careful in the office.
By Arit, survey lead · Issue 11 · November 2026
What you get
Four outputs, one flight
Contours and terrain model
Contour lines at 0.5m or 1m and a surface model for drainage and earthworks.
From ₦60,000 plus ₦25,000 per hectare
3D model and volumes
A textured 3D model, stockpile volumes and cut and fill estimates.
From ₦80,000 plus ₦20,000 per hectare
Site video and stills
A two minute edited flyover and 30 graded stills for investors and buyers.
From ₦120,000 plus ₦4,000 per hectare
Method
How a survey flight runs
Before the flight we study the boundary you send, check the airspace and arrange permission with the site owner and, where needed, the aviation authority. We plan the route on a tablet: height, overlap and flight lines.
On the day we set and measure at least five ground control points with survey grade GPS. The drone flies the grid automatically, changing batteries every 25 minutes. Most sites under 40 hectares are done before the midday heat.
Back at Marian Road the images are processed into a single map and a terrain model, checked against the control points, and delivered as a link and as files your surveyor or engineer can open.
If accuracy matters for a title or a design, we work with a registered surveyor who checks and signs the final plan.
Flying is the quick part. The careful part is the control on the ground and the checking afterwards.
Who it is for
Six reasons people call us
Land buyers
See exactly what you are buying, including access roads and neighbours.
Developers
Plan estates and roads on an accurate base map.
Contractors
Monthly progress flights and earthwork volumes.
Farms
Stand counts, gaps, drainage and boundary checks.
Quarries
Stockpile volumes without stopping the trucks.
Roofs and towers
Close inspection photos without scaffolding.
Specifications
The fine print
| Item | Standard |
|---|---|
| Flight height | 80 to 120 metres above ground |
| Image overlap | 75 percent front, 70 percent side |
| Ground resolution | 2 to 3 centimetres per pixel |
| Accuracy with control | About 3 centimetres horizontal, 5 vertical |
| File formats | GeoTIFF, DXF contours, OBJ model, PDF plan |
| Turnaround | 2 working days up to 40 hectares |
Questions
About surveys
Is a drone map a legal survey plan?
No. It is a measured base map. For a survey plan used in a title, a registered surveyor checks and signs the final work, and we can arrange that.
What if it rains on the day?
We move the flight. There is no charge for weather days.
Can you fly near the airport?
Some areas near the airport and military sites are restricted. We check every site and tell you before we book.
The back page
Draw your site. Get a price.
Trace the boundary of your land on our map, choose what you need, and see an example quote in a minute. Surveys, progress flights and aerial photography across Cross River.