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 Simply stated, a three dimensional (3D) Laser Scan (also referred to as a High-Definition scan or point cloud) is like an image from a digital camera, except that each and every pixel can be established in a real world 3D coordinate system. As compared to traditional surveying methods that field identify individual specific points, High-Definition scanning generates intense regions of points. Accordingly, the surveyor, designer, and/or client has subsequent access to a much larger database of information should survey requirements later change or expand.
3D Laser Scanning is utilized to accurately capture and store "as-built" or "existing" information on areas ranging from mechanical plants to ancient monuments. The scanner captures the information from a scanned area in a digital format. Once in that format, the user can view, measure, assess, and totally interact with that area as though they were located within the actual environment. Clients move freely around in this environment, adopt any chosen viewpoint, and zoom in or out to inspect or measure selected detail. The scanner's "point cloud" is like a visualized 3D model reflecting real world features in an accurate, re-locatable coordinate system.
3D Laser Scanning services provide a higher level of survey data accuracy with greater field efficiency to meet the diverse needs of architects, engineers, government agencies, contractors, attorneys, etc. Expedited access to field data from the scanner creates the ability to determine specific dimensional requests more quickly and to customize deliverables to meet the clients' needs without numerous site re-visits.
Benefits
 WHGA can accurately capture and document a building's interior or exterior to facilitate the architectural design process for building construction or renovation. The scan data provides an alternative to existing documents that may prove incomplete or inaccurate and thus, enhances the designer's ability to identify component conflicts. Point cloud data can also be utilized in many CAD and visualization software packages to create informative models to give a complete and interactive view of the project. The modeling information can also assist in evaluating other parameters, such as sun shading, sight lines, and relational mass that may have significant project considerations.
WHGA can accurately capture and document a facility's information, including mechanical equipment, piping, structural components, treatment works, etc., to establish critical clearances and/or work spaces. Scan data can be compiled in many restricted areas where traditional surveying methods would not be feasible.
WHGA can accurately capture and document the conditions of existing structures or sites to establish definitive pre-construction conditions. These same procedures can be utilized to establish extensive documentation on historical structures or sites.
Recent Projects (Place cursor on images to reveal 3D scans of these sites)
Lincoln Memorial - Washington, DC
Prior to 2008 renovations, WHGA scanned
the site of the Lincoln Memorial to ensure no damage was caused by the general contractor
during the performance of services.
Pollution Control Plant - Fairfax County, VA
WHGA provided 3D Laser Scanning and modeling services for the interior tunnels of a pollution control plant in Fairfax County, Virginia.
National Gallery of Art - Washington, DC
WHGA performed a comprehensive topographical survey, including a 3D Laser Scan of the existing grounds at the National Gallery of Art. In addition to developing contours of the existing site conditions, WHGA identified (by grade) all potential low points for water infiltration into the various buildings comprising the National Gallery of Art.
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