Contour Mapping
We produce accurate contour maps for your site from field topographic-survey data (Total Station and GNSS-RTK) or from elevation models extracted from drone imagery: we build a TIN/DTM terrain model and generate contours at the interval you need (0.25 m for flat sites, 0.5 m and 1 m for general projects), with spot levels, ridges and depressions, and surface-drainage flow lines. The output is a layered DWG, a PDF for approval, and a KMZ for Google Earth preview — ready for grading and drainage design and cut-and-fill quantities.
- Turnaround
- 4–8 working days
- Deliverables
- 5
By the numbers
- 0.25–1 m
- Contour interval
- 4–8 days
- Turnaround
- TIN/DTM
- Terrain model
The problem we solve
Designing on land with unknown terrain means grading and drainage surprises: water ponding where it should not, and cut-and-fill quantities ballooning after award. An accurate contour map before design reveals the true slope of the ground and steers level decisions from day one.
Who needs this service
Designers, consultants, developers, and grading/infrastructure contractors who need a reliable terrain model for level design, drainage networks, feasibility studies, and quantity takeoff.
When you need this service
- To design drainage networks and grade sites
- For feasibility studies on large development projects
- For environmental and hydrology studies
How we execute
- 1
Compile field survey data or process drone imagery into an elevation model
- 2
Build the TIN/DTM terrain model and clean outlier points
- 3
Generate contours at the required interval and verify ridges and depressions
- 4
Export DWG, PDF, and KMZ and run QA against the source data
What we need from you
- Topographic survey data or point cloud
- Required contour interval (0.25m, 0.5m, 1m)
- Required coverage area
What you receive
- Contour map in DWG and PDF
- 3D TIN model
- KMZ export for Google Earth preview
- Digital elevation model (DEM/GeoTIFF)
- Slope-direction and surface-drainage flow map
Equipment & methodology
We equip this service from our owned fleet of 90 instruments:
Survey drones
UAV photogrammetry and LiDAR for orthomosaics, topographic mapping, and asset inspection.
We own and operate our field fleet — our site shots carry the “From our field work” chip, alongside class-reference photos.
Frequently asked
Do you work from drone data?+
Yes, we work with DEM and orthophoto from UAVs to produce high-accuracy contours.
Does this include quantity takeoff?+
Quantity takeoff is a separate service but easy to add after the contour map is prepared.
How much does a contour map cost?+
Pricing is scoped to the project: location and area, input quality, required deliverables, and review rounds. After reviewing the requirements we provide a written quote stating cost and schedule before work starts; there is no published fixed tariff for this service.
Can Google Earth or SRTM data replace a field survey?+
They serve preliminary studies only; their vertical accuracy is within several metres and cannot support grading and drainage design or quantity calculations. For design-grade work we use a centimetre-accuracy field survey or a drone-derived elevation model tied to ground control points.
Our crews on real projects
Real photographs from GeoGiza's field projects across Egypt and the region.
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Our guarantees to you
We take the risk off your project — so you can commit with confidence.
Accuracy guarantee
If a deliverable misses the agreed accuracy spec, we re-survey and correct it at no extra cost.
On-time commitment
We agree the delivery schedule up front and keep you updated at every stage until it's met.
Full confidentiality
Every engagement is covered by an NDA. Your data and drawings are never shared.
You own the files
You receive the editable source files (DWG, DXF and more) — full ownership, no lock-in.