If you are buying or selling property or refinancing, FEMA (ACT BW-12) now requires you to have a

Land Grant Surveyors 3D Scanner3D Laser Scanning, also known as High Definition Surveying, is an exciting new technology that is blazing its way into the surveying, architecture, civil engineering, construction…..you name it….industries. Its uses are: archeology and heritage, facililcy asset, athletic fields, building redesign and repurposing, construction assessment, facilities analyses, forensic investigation, utility management and 2D to 3D or 3D to BIM conversion.

And now Land Grant Surveyors can help you discover how 3D Laser Scanning can work for you with our new Leica Scan Station 2.

What does 3D Laser Scanning mean to you?

Cost savings – New semi-phased laser technology allows LGS’s Leica Scan Station 2 to record a single point in a matter of nanoseconds, with a result of 50,000 points a second. And that adds up to COMPLETE site survey in a fraction of time to traditional survey methods.

Accuracy – With the Scan Station 2, LGS can place every single point in a scan to an accuracy of less than six millimeters.

Completeness – A major advantage of High Definition Survey scanning is the level complete site recordation. EVERYTHING in viewable range is data. Which means much less need for multiple site visits for re-shoots, additional shoots, or investigation. With coordinated digital photographs with the data, everything you need is at your fingertips.

Workability – All data is fully functional within any CAD or Building Information Modeling environment, and can be easily coordinated with needed location dataset.

So, what can LGS do for you? – we can provide a time effective way to acquire not-before-seen precision and realism in site inventory data, in a cost saving, highly accurate manner.

FAQ – 3D Laser Scanning

The following is an evolving list of frequently asked questions and concerns we encounter involving 3D laser scanning and modeling.

Q. What is 3D laser scanning or LIDAR?

A. Simply put, 3D laser scanning, or LIDAR, works on the same principle as a laser range finder. The central unit sends out laser and when it contacts a surface, that point of contact is recorded. The difference being 50,000 up to 900,000 points can be recorded every second, and they are recorded into a 3D composite environment. Additionally, photographs maybe correlated with the point locations to colorize the points for realistic feel.

Q. What is the accuracy expectation of 3D scanning?

A. Accuracy is dependent upon the model of scanner, and distance scanned. For an average duty scanner, an accuracy of 1-3mm ,for under 100ft. away, and, 3-4mm for over 100ft. way, can be expected.

Q. What is the output of a 3D laser scan?

A. The initial output of a laser scan is a point cloud. A point cloud consists of the coordinately referenced points within a 3D coordinate system. A 3D reproduction of the scan in a virtual environment. Multiple point clouds can be merged through a process called registering, which is using common reference points to orient the clouds to each other. The clouds, whether separate or combined can then be exported to any number of formats, DWG’s to ASCII text files, to then be used in other design software. More on that further along in the FAQ.

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