Glossary of Terms

What Is UAV Photogrammetry?

UAV photogrammetry is a means of generating 3D representations with remarkable precision using digital images captured by a camera mounted beneath an unmanned aerial vehicle, most often a drone. Downloaded into photogrammetry software, the data can then be used to create detailed maps and models for engineers, architects, city planners, or contractors. Among its many applications, UAV photogrammetry can be used for quality control, construction verification, damage assessment, accident investigation, flood control planning, and infrastructure inspection.

In one brief flight millions of accurate survey data points can be collected, reducing project time from weeks to days, and the exhaustive amount of data collected generally eliminates the need for repeated trips to the survey site. Pilots stay safely earthbound and out of the way of hazards such as construction work, traffic, or rough terrain. Finally, our drone surveying experts can deliver data in any CAD, non-CAD, 2D and/or 3D format you require.

What is an ALTA survey?

An ALTA survey is conducted by a state-licensed professional land surveyor in compliance with standards set by the American Land Title Association, an organization overseeing the title insurance trade.

Of interest to title companies, insurers, and lenders in both residential and commercial transactions, ALTA surveys provide more detail than a simple boundary survey. Often commissioned in order to provide due diligence, ALTA surveys document utilities and improvements to the property as well as any plottable encumbrances affecting the site that are referenced in a current title commitment at the time of the survey. Our survey maps meet a uniform set of national standards that ensure the client, title company, and lender will receive a survey containing the required information necessary to issue title insurance and/or fund a commercial real estate loan.

What Are As-Builts in Construction?

As-built surveys provide maps and models of existing structures for reference. They can be helpful both during construction and upon completion. As-built surveys generated at different points in the construction process are used to monitor progress and detect structural deficiencies or variances. A final as-built survey offers a means of construction verification as well as detailed images necessary for future modifications. Field work is completed within days, saving time and money. Data is collected at safe distances with non-intrusive and non-destructive LiDAR methodologies--no work stoppage required. Our as-built surveys are highly accurate; average tolerance is set at 4-6 mm (0.25 inches). Tighter tolerances including submillimeter accuracy are also possible depending on your needs.

How Are Drones Used in Surveying?

Drones, or unmanned aerial vehicles (UAV), with cameras mounted beneath produce millions of data points from safer distances and at lower costs than were possible with traditional methods of surveying. Drones flying a grid pattern or using waypoints over the targeted area take overlapping photographs that, when entered into specialized software programs, produce highly accurate measurements. The data can be used to create a variety of precise maps and models with applications for many professions, including construction, engineering, mining, city planning, law enforcement, infrastructure, and flood control. Whether you need to get an as-built survey in order to expand a hospital wing, gather data on the efficiency of your solar panel field, create a floodplain simulation, or obtain measurable orthomosaic photographs of a golf course, drone surveys deliver solutions.

What Is Subsurface Mining Surveying?

Subsurface mining surveying provides precise maps and models of tunnels, shafts, and other underground assets. Subsurface surveys using the latest 3D scanning technology allow professionals to work from a safe distance. The collected data can be used in combination with specialized software to generate maps and models used for structural health assessments, renovations, clash detection, change detection, geologic mapping, and seismic movement detection and monitoring Mining surveys also enable construction monitoring.

What Are As-Builts?

As-builts are detailed maps and models of every part of a structure. 3D laser scanning technology makes the process fast, safe, and efficient, and as-builts are critical in keeping construction costs in line. Imagine not having accurate as-builts of an existing structure and finding out on construction day that costly changes need to be made because clashes in plumbing, HVAC, and utility lines were not accounted for. As construction progresses, as-builts give your whole team eyes on the project; everyone can receive the same measurement data at the same time. Once completed, the final as-built survey enables construction verification and provides an accurate model to consult when future modifications occur.

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