Surveys are always different. That can be pointed out from the experience of 10 years and hundreds of surveys. Our long experience has taught us the best practices for all kinds of 3D surveys, and we want to use that knowledge to serve our clients perfectly.

This blog series introduces the whole service chain of VRT from planning the survey to utilizing the results. You get to know some of our brilliant professionals and learn to know what matters in 3D survey.

What to consider when buying a survey?

There are a few basic things to consider when you are starting a procurement of a survey project. The easiest way, of course, is to pick up the phone and call us! However, if you would like to prepare something first, read on to know the basics.

What do you need the information for?

First you need to define your goals. Is the information needed for planning some new structures or repairing the old, do you want to do a quality check or inspect the current condition? All these situations are very common starting points for 3D surveys.

Figure out the schedule when you need the survey results – we operate with two vessels and a drone, so field schedules are quite flexible. Weather plays a part in planning the survey, and so does traffic (if surveying a port, for example). The post-processing and analyzing also takes time, so it is wise to get in contact at least 4-6 months before the deadline for the results.

What is the survey area?

The most important matter influencing the survey project is the area to be surveyed. What kind of structures there are, how wide is the area, and what is the depth of the water? What are the coordinate and height reference systems you use?

Underwater sonar surveys can be combined with laser scanning and / or photogrammetry by a drone, and we offer also static laser scanning for land areas. Draw the survey area on the map and define what is the most important area of interest. We have a strong experience in surveying bridges, ports, oil terminals, pipelines, hydropower plants… Basically all industries, which have underwater structures, are familiar to us. Regarding to underwater surveys, our vessel requires a free height of 3 meters and 1,5 meters keel clearance, but some of the shallower shore areas can still be surveyed by tilting the sonar. Drone is usually used when creating a digital twin of the assets also on the land.

What are the wanted deliverables?

gisgro 3D online software

The main product from the survey is a point cloud. The point cloud is an exact, georeferenced representation of surveyed area or object. The raw data itself is not very useful, the value in point cloud comes visible only after processing. Our reporting crew cleans and analyzes the survey data, delivering a full report of the observations for your use. We can also do further modelling from the point cloud to meet your needs.

We offer our clients a processed and analyzed point cloud in a unique online platform, GISGRO. It enables the utilization of a point cloud in an easy way. GISGRO has in-app features for measurements, CAD-drawings, cross-cuts and contours, for example, so you can utilize the data yourself without any additional software installations.


How to get started?

Our 3D Asset Management Specialists answer your questions in Finnish, English, Swedish and German, and are eager to discuss further about your needs in 3D surveys. You can contact us by leaving a message below and we’ll get back to you the soonest!



Read also the following parts of the blog series 3D Survey as a Service:

Passion for accurate data below and above waterline

The art of point cloud processing

Inspection reveals the story of the underwater structure

What happens after a survey project?


Interested in our services? Contact us!

Karri Kolehmainen & Ville Mäkeläinen

Karri Koistinen

+358 40 0604927



Ville Mäkeläinen

+358 44 513 2222


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