Issue link: https://fieldtech.trimble.com/resources/i/1252353
Can the solution operate without Internet or cellular connectivity? Why it's important: An AR solution that includes GNSS integration that works with a global satellite delivered, high-accuracy correction stream enables accurate positioning even when users don't have Internet or cellular connectivity. This feature enables the use of AR in remote locations and cellular dead zones, while also saving on mobile data usage. Is the solution capable of electronic distance measuring (EDM)? Why it's important: A rangefinder with EDM allows for measurement between remote points. Some can measure distances to objects that are more than 100 feet away, depending on the target type, surface and lighting, and measure between the real world and the 3D model being viewed by the user from the smartphone. By being able to measure remote points and record as-built information, such as the location of a pipe in a trench, for example, the user can stay well out of harm's way. EDM also accurately identifies the ground elevation at the point the user is looking at to enable correct representation of the model data. EDM capability ensures what the user is seeing appears in true- to-life scale, whether above or below ground, and that they get the most accurate understanding of their 3D data. To address the practical requirements of working on/near roads, a range of greater than 50 feet is highly desirable. Is the solution capable of multiple modes of accurate measurement? Why it's important: An AR solution with multiple modes of measuring allows the user to measure between points in the real world, points in the model, or between the model and the real world. In addition to measuring with EDM, GNSS can also measure objects in the physical world based on where the user positions the handheld device. And AR measurement functionality allows the user to do measurements directly on the 3D model. The Advantages of GNSS over GPS Many people in the construction industry are familiar with GPS, but may be less familiar with GNSS or think the two terms are interchangeable. However, there are a few important differences. GPS (Global Positioning System) is the U.S. system of satellite navigation— or "satnav." GNSS (Global Navigation Satellite System) is collectively made up of the U.S. GPS, European Galileo, Russian GLONASS, Chinese Beidou, and other regional satnav systems. GPS and GNSS each provide autonomous geospatial positioning with global coverage. But GNSS has the advantage in that there are more satellites to access, which increases positioning accuracy and satellite availability, especially when a portion of the sky is obstructed. GNSS also provides better redundancy. Though it's rare for a satellite to fail, in the event that one does, GNSS receivers can get signals from other systems to avoid a disruption in performance. Learn more about GNSS positioning services specifically for construction applications.