How to Choose a Geodetic Surveying Contractor: 8 Criteria for Construction and Oil & Gas Companies

An error in choosing a geodetic contractor is rarely visible straight away. It surfaces later: at the state expert review, during the assembly of structures, while handing over as-built documentation to the field operator. By that point the money has already been spent, deadlines have slipped, and rework costs several times more than the original job. That is why the question of how to choose a geodetic contractor is not about finding the lowest bid in a tender, but about assessing the contractor’s ability to deliver documentation that regulatory bodies and the client will accept. For sites in Aktau and Mangystau Region the cost of an error is especially high: remoteness, difficult terrain and the requirements of major operators do not forgive a box-ticking approach.

This article is written for those who draw up the technical specification and decide on the contractor — heads of construction companies, technical directors and procurement specialists. Below are eight criteria by which a geodetic surveying company in Aktau (or any other region of Kazakhstan) is assessed even before the contract is signed.

Criterion 1. Metrological Certification of Equipment

Start with verification, not with the price list. Any geodetic instrument — a total station, a GNSS receiver, a level — is a measuring instrument and is subject to mandatory periodic verification. A conscientious contractor holds a valid verification certificate for every instrument, with an unexpired term. This is not a bureaucratic detail but a condition for the legal validity of the results.

Using unverified equipment is a direct violation of metrological requirements. Documentation prepared with such an instrument may be refused by a regulatory body or rejected at expert review, even if the actual measurements were taken accurately. Formally, they carry no evidentiary weight.

What to ask the contractor for: copies of valid verification certificates for the specific instruments that will be sent to your site (by serial number), rather than a blanket statement that “the equipment is verified.” Matching the serial number on the certificate with the one in the instrument’s passport is a simple check that filters out a large share of unscrupulous contractors.

Criterion 2. Relevant Experience on Industrial and Oil & Gas Sites

Surveying at a wellsite is not an enlarged copy of surveying on an urban construction site. An industrial oil & gas facility runs by different rules: the operator’s own coordinate systems, its own set of as-built documentation, its own admission and handover procedures. Knowledge of these regulations does not come from a textbook — it is built up over years on real sites.

Geodetic work on the fields of Mangystau requires an understanding of the specifics: saline and subsidence-prone soils, the erosional terrain of the chinks, long GNSS baselines where state-network points are hard to reach. A contractor who has only done boundary surveys of country plots will encounter these conditions for the first time on your site — at your expense.

What to ask the contractor for: a list of completed sites similar to yours in type (oil & gas, energy, industrial construction), naming the client and the nature of the work. Vague phrases such as “extensive experience” mean nothing without concrete cases. We covered the types of geodetic work specifically on oil & gas sites in detail in a separate article.

Criterion 3. Staff Qualifications and Clearances

It is people who come to the site, not a company logo. The specialists performing geodetic and mine-surveying work must hold the relevant qualification and certification. For work on a subsoil user’s licensed block, a separate layer of requirements is added: a completed work permit, a passed introductory occupational-safety briefing, and industrial-safety training in line with the specific operator’s regulations.

If a crew arrives at a field without the proper clearances, they simply will not be let onto the site — and the clock is already ticking. A contractor’s experience in completing all the paperwork procedures directly shortens mobilisation time and removes the risk of downtime.

What to ask the contractor for: confirmation of the key specialists’ qualifications and an understanding of the admission procedure for your operator’s sites. A good contractor will ask in advance whose licensed block the work is on and will itself outline which approvals will be required.

Criterion 4. An Equipment Fleet Matched to the Specific Task

A single all-purpose instrument does not cover every task. Different types of work require different instruments, and a contractor should have a fleet matched to the specific type of task rather than forcing everything through the one total station it happens to own.

Task	Suitable instrument	What it delivers
Ground survey, setting out	Leica TS06 Plus total station	High angular accuracy, reflectorless measurements
Coordinate referencing, RTK	South Galaxy G9 / G7 GNSS	Sub-centimetre accuracy in the state coordinate system
Surveying large areas	DJI Matrice 4E drone	Orthophoto and DTM of areas from 50 ha many times faster
Deformation monitoring	Leica LS10 digital level	High-precision levelling, monitoring of structure settlement
Soil testing	CPT/DPT equipment	Data on the bearing capacity of the foundation

What to ask the contractor for: exactly which instrument will be used for your task and why. If only a ground total station is proposed for surveying a 200-ha field pad, that is a red flag — the work will stretch into weeks instead of days. Our equipment fleet is put together so that each type of work has a purpose-built instrument.

Criterion 5. The Full Cycle of Work Under One Roof

Every handover of the project between different contractors is a risk. One captured coordinates in their own system, another formatted the documentation their own way, a third failed to address an expert-review remark — and at the seams, time, money and accuracy are lost. When the field survey, office processing, as-built documentation and cadastral registration are run by a single team, a single coordinate system is in force, end-to-end continuity of data is ensured, and a single point of responsibility is preserved.

For the client this means a simple thing: one contractor answers for the result, not a chain of subcontractors nodding at one another when a problem arises. We examined how such end-to-end work is structured, using land management as an example, in the article on the seven stages of a land management project.

What to ask the contractor for: whether it can cover the entire scope of work you need on its own, and what exactly is subcontracted. The fewer handovers between hands, the lower the risk of mismatches.

Criterion 6. Mobility and Regional Presence

Sites in Mangystau Region are rarely located right outside the office window. Wells, pumping stations and pipeline routes are often 200–400 km from Aktau, in places without infrastructure. A contractor must have its own transport, expedition equipment and experience of autonomous work in the field — otherwise every trip turns into a logistics problem.

Regional presence matters for another reason too. Geodetic work in Mangystau is familiar ground for a local company: the state-network points are known, the routes are worked out, relations with operators are established. A contractor from another region spends time and money on what is routine for a local one, and builds those costs into the estimate.

What to ask the contractor for: where it is physically based, whether it has its own transport and experience working on remote sites in your area. A geodetic surveying company in Aktau with a real presence in the region mobilises faster and more cheaply than an outsider from the capital.

Criterion 7. Quality of Documentation and Referencing to the State Geodetic Network

A beautiful survey without correct referencing is useless. All geodetic documentation handed over to the client and to regulatory bodies must be referenced to the state geodetic network of Kazakhstan. Using arbitrary local coordinate systems without transformation keys is impermissible: such data cannot be correctly combined with the design, the cadastre and adjacent sites.

This is particularly difficult in areas with a limited number of surviving state-network points — and in remote parts of Mangystau Region this is common. Here it is necessary to perform long GNSS baseline observations and correctly recompute the data into the local coordinate system used by the specific operator. An error at this step poisons the entire rest of the project.

What to ask the contractor for: in which coordinate system the work will be delivered and how referencing to the state network is ensured. The documentation must include a coordinate catalogue, a referencing diagram and an accuracy assessment — not just “pretty pictures” in a PDF.

Criterion 8. Reputation and Verifiability

Claims of reliability must be backed by something. Anyone can talk themselves up; a verifiable reputation means documents and traces of activity you can see with your own eyes. Reference letters from real clients (especially from oil & gas and energy), reviews, a portfolio of completed sites and a supplier profile on the state procurement portal goszakup.gov.kz say more than any presentation.

The goszakup profile, in particular, shows a history of participation in state and corporate procurement — a public and hard-to-falsify trace. A company that has worked on the market for a long time and systematically leaves such a trace naturally.

What to ask the contractor for: reference letters, contacts for feedback from past clients and a link to the supplier profile. A conscientious contractor will provide this without any strain. GeoProGlobal LLP has worked on the market since 2013, holds a supplier profile on goszakup and reference letters from clients in the oil & gas and energy sectors.

Summary Table: Criterion → What to Look At → Red Flag

Criterion	What to look at	Red flag
1. Equipment verification	Valid certificates by serial number	”Everything is verified” without documents
2. Relevant experience	Cases in oil & gas and industry	Only boundary surveys of country plots
3. Qualifications and clearances	Certification, work-permit experience	A crew without clearances for the operator’s site
4. Equipment fleet	Instrument matched to the specific task	A total station for surveying 200 ha
5. Full cycle	Work by one team, minimal subcontracting	A chain of contractors with no one responsible
6. Mobility	Own transport, presence in the region	No experience working on remote sites
7. State-network referencing	Coordinate catalogue, referencing diagram	Arbitrary local system without keys
8. Reputation	References, goszakup profile	Not a single verifiable trace

Conclusion

The question of how to choose a geodetic contractor comes down to a single check: is the contractor able to deliver documentation that the client, the expert and the regulatory body will accept on the first attempt. The eight criteria above — from equipment verification to a verifiable reputation — provide a structure for such an assessment as early as the tender stage, before an error costs you rework and blown deadlines.

GeoProGlobal LLP was founded in 2013, is based in Aktau and works across Mangystau Region and Kazakhstan. We cover the full cycle of geodetic work in Mangystau and beyond — from field survey and UAV aerial photography to as-built documentation and deformation monitoring, with verified equipment, certified specialists and referencing to the state network. As a geodetic surveying company in Aktau with a real regional presence, we mobilise quickly and deliver documentation ready for expert review.

To discuss your site and receive a commercial proposal, get in touch with us via geoproglobal.kz — we will prepare a calculation within one business day.