VERIFY 3D LIBRARY

VERIFY 3D GLOSSARY

 

3D MEASUREMENT

A measurement that includes three values, one each for the X, Y, and Z directions. The values are the distances from an arbitrary 0,0,0 point.

 

LASER SCANNER

A surveying instrument that emits pulses of laser light and calculates distances based on differences between the emitted pulse and the light that was reflected back from some object.

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POINT CLOUD

The set of 3D measurements with X, Y, Z, coordinates collected by a laser scanner. When the measurement points are displayed on a computer screen, the image resembles a cloud or a late 19th. Century Pointillist painting.

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REGISTRATION

Combining multiple scan positions into a single conglomerate point cloud. Scans are mathematically aligned using millions of overlapping points between stations.  Methods include scan-to-scan and scan to target registration.  Targets may be placed on survey control points allowing registration to global or site survey coordinates.

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