Acquiring Land
Boundary identification, cadastral information, property investigation and professional surveying support.
Cadastral surveying
Our Services
Comprehensive Surveying & Geospatial Solutions
At OAS Geospatial Consults, we provide professional surveying, geospatial mapping, engineering, and property consultancy services tailored to meet the needs of individuals, developers, investors, and organisations. From land acquisition and property documentation to construction and infrastructure development, we deliver accurate spatial data, reliable technical expertise, and practical solutions that support informed decisions and successful project delivery. Not sure which service you need? Book a live consultation or jump straight to the fee estimator.
Core services
Our Core Services
Professional surveying and geospatial services designed to support informed decisions, accurate project delivery and sustainable development across land, engineering, construction and infrastructure.
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How we support your project
Geospatial Expertise Supporting Every Stage of Development
Most projects reach a point where someone needs reliable information about the land. OAS provides it at each stage, from the first decision to the finished structure.
Planning Development
Topographical and spatial information supporting planning, design and development decisions.
Topographical surveyingExecuting Construction
Engineering surveying, setting-out, dimensional control and verification.
Engineering surveyingManaging Spatial Information
GIS, mapping, geospatial analysis and spatial data solutions.
GIS & spatial analysis
Services at a glance
Cadastral & Boundary Survey
Establishing and defending property boundaries.
Topographic Survey
Ground models before design begins.
Engineering Survey
As-built verification during construction.
GIS & Geospatial Mapping
Structured, queryable land information.
Drone / Aerial Survey
Fast, wide-area capture for large sites.
Control & Setting Out
One reference every trade builds from.
Layout & Subdivision
Every plot pegged before ground is broken.
Hydrographic Survey
Lagoon, creek, and coastal corridors.
Development & Investment Advisory
Geospatial insight for investment decisions.
Pipeline / Route Survey
Corridor alignment, chained end to end.
Geodetic Control Network
One shared reference for the whole site.
3D Laser Scanning
Point-cloud capture, BIM-ready models.
Equipment Sales
GNSS, total stations, and drones supplied.
Professional Training
Hands-on GNSS, total-station & GIS training.
Land & Property Investigation
Title search and due diligence before you buy.
01 · Statutory
Cadastral & Boundary Surveying
The foundation of every land transaction. We establish, re-establish, and defend property boundaries — tying every beacon to government control so your title stands up to scrutiny, sale, or litigation.
Includes
Perimeter survey, re-establishment of missing beacons, litigation survey (plan compilation & court appearance), change-of-title survey.
Typical clients
Individual land owners, estate developers, law firms, financial institutions requiring title verification.
Deliverable
Signed & sealed survey plan (paper + cloth copies), record copy lodged with the relevant authority.
02 · Design
Topographic Survey
An accurate model of the ground before design begins. We capture detail, contours, and levels so architects and engineers design against what's actually on site — not an assumption.
Includes
Detail survey, contour & spot-level capture, existing-feature mapping for design and drainage planning.
Typical clients
Architects, town planners, developers scoping a site before design.
Deliverable
CAD/GIS-ready topographic drawing with spot levels, contours, and existing site features.
03 · Engineering
Engineering Survey
Verification once construction starts. We check what's actually been built against the design — as-built surveys and construction-stage detail for civil, structural, and MEP teams.
Includes
As-built survey of developed property, construction-stage detail survey, level and alignment verification against approved drawings.
Typical clients
Engineering consultants, contractors, facility managers, quantity surveyors.
Deliverable
CAD/GIS-ready as-built drawing verified against design, with levels and existing site features.
04 · Geospatial
GIS & Geospatial Mapping
We turn field coordinates into structured, queryable land information — layered, attributed, and ready to plug into your own land information system or management dashboard.
Includes
Spatial data capture & digitisation, thematic mapping, parcel/attribute databases, land information system (LIS) setup.
Typical clients
Government agencies, estate/property managers, utility companies, research institutions.
Deliverable
GIS layers (shapefile / geodatabase), interactive map, and attribute reports.
05 · Aerial
Drone / Aerial (UAV) Survey
For large or difficult-access sites, our UAV crews capture centimetre-accurate imagery and terrain data in a fraction of the time a ground crew would need — ideal for estates, quarries, and progress monitoring.
Includes
Orthomosaic mapping, digital elevation/terrain models, volumetric (stockpile/cut-fill) calculations, progress imagery.
Typical clients
Large estate developers, mining & quarry operators, construction project managers.
Deliverable
Orthophoto, point cloud / DEM, and a volumetric or progress report.
06 · Construction
Control Identification & Setting Out
Before the first excavation, every trade on site needs to build from the same reference. We establish and certify control points, then set out building lines, levels, and services accordingly.
Includes
Control point establishment, building/grid setting-out, level transfer, periodic verification during construction.
Typical clients
Main contractors, project managers, structural engineers.
Deliverable
Setting-out certificate and control point schedule with coordinates and levels.
07 · Planning
Layout & Subdivision Survey
Turning a single parcel into a marketable estate. We design and survey plot subdivisions that balance saleable yield against access, setback, and statutory approval requirements.
Includes
Layout design, plot subdivision survey, beacon placement across the estate, special beacon number application.
Typical clients
Estate developers, real-estate investment companies, cooperative housing schemes.
Deliverable
Approved layout plan with individually beaconed and numbered plots.
08 · Marine
Hydrographic Survey
Lagos is defined by its waterfront. We survey lagoon, creek, and coastal corridors — the same 200m waterfront and 100–200m highway corridors the NIS fee schedule zones separately — for reclamation, marina, and waterfront development projects.
Includes
Bathymetric survey, shoreline mapping, waterfront boundary determination.
Typical clients
Waterfront developers, marina operators, dredging & reclamation contractors.
Deliverable
Bathymetric chart and shoreline survey plan.
09 · Advisory
Property Development & Investment Advisory
Geospatial insight applied to investment decisions — site due-diligence, layout feasibility, and ongoing asset/management support for landlords and investors building a portfolio.
Includes
Land due-diligence, title & boundary risk review, layout feasibility studies, portfolio mapping for management.
Typical clients
Property investors, family offices, institutional land buyers, estate managers.
Deliverable
Due-diligence report with mapped findings and recommendations.
10 · Corridor
Pipeline / Route Survey
Long, narrow, and often remote corridors need their own survey discipline. We map pipeline and route alignments end to end, tied to control and chained for construction and as-built record.
Includes
Pipeline corridor survey, road/utility route alignment survey, chainage and crossing capture, as-built route documentation.
Typical clients
Oil & gas and utility companies, road contractors, engineering consultants.
Deliverable
Route/corridor alignment drawing with chainage, levels, and crossing data.
11 · Geodetic
Geodetic Control Network Survey
Before any site-level survey can be trusted, it needs a wide-area reference framework. We establish and densify geodetic control networks tied to government beacons, giving every downstream survey a common, defensible datum.
Includes
Primary/secondary control point establishment, GNSS static observation, network adjustment, beacon tie-in and certification.
Typical clients
Large estate and infrastructure developers, engineering consultants, other survey firms needing a shared datum.
Deliverable
Control point schedule with adjusted coordinates, levels, and network diagram.
12 · Scanning
3D Laser Scanning
For structures and sites where a drawing alone isn't enough, we capture the whole surface as a point cloud — millions of measured points, registered into a single, dimensionally accurate 3D model.
Includes
Terrestrial laser scanning, point-cloud registration and cleanup, BIM-ready 3D model export.
Typical clients
Architects, structural engineers, heritage conservators, facility managers.
Deliverable
Registered point cloud and 3D model file with a survey report.
13 · Equipment
Equipment Sales
Not every project needs an outside crew — sometimes you need the right instrument in your own hands. We supply survey-grade GNSS receivers, total stations, and drones, backed by setup and after-sales support.
Includes
Supply of GNSS receivers, total stations, and drones; accessories and consumables; equipment calibration referrals and after-sales support.
Typical clients
Surveying firms, government agencies, contractors, and institutions building in-house survey capacity.
Deliverable
Supplied equipment with setup guidance and ongoing support.
14 · Training
Professional Surveying & Geospatial Training
Good equipment is only as good as the person using it. We run hands-on training in GNSS and total-station fieldwork and GIS software, for trainee surveyors, students, and corporate teams.
Includes
Hands-on GNSS and total-station field training, GIS software workshops, guidance on SURCON professional practice requirements.
Typical clients
Trainee and student surveyors, corporate field teams, organisations building internal geospatial capacity.
Deliverable
Completed training programme with a certificate of participation.
15 · Due Diligence
Land & Property Investigation
Before you commit funds to a parcel, know what you're actually buying. We investigate title, verify records against government registries, and confirm a property's status so your purchase decision rests on evidence, not a seller's word.
Includes
Title search, land registry verification, physical site inspection, ownership and encumbrance checks, due-diligence report.
Typical clients
Prospective land buyers, diaspora investors, banks and lenders, estate developers vetting acquisition targets.
Deliverable
Written due-diligence report covering title status, registry findings, and site observations.
Survey fees depend on the state
Get an instant estimate for Lagos from the NIS 2024 scale of fees, or request a quote for Ogun, Oyo and other states.
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