This is what the industry says about Vaira

»When surveying on Norderney, the measurements and sketches are often a challenge. Nearby there are frequently no good reference points to measure from – or important parts of the route are obscured. To line up properly from the edge of a building, you need two people for the survey. That’s why we’d been looking for a solution to replace the tape measure, laser distance meter, and angle prism for quite a while. The Vaira app is perfect for letting a single person handle the documentation. Without much effort, I simply capture all the important points and transfer them into my GIS.«