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High Definition Survey (HDS) is becoming an industry standard for surveying projects. Historically, the costs involved with high definition surveys were very high therefore the technology was used only on larger projects. But today, advancements in technology have made high definition surveys a viable option for projects of all sizes. HDS allows surveyors to acquire vast amounts of data positions quickly. Here's how it works: A narrow beam of pulsed laser moves across the target recording an unprecedented number of measurements in minutes. These scanned measurements are then displayed on a computer screen in the form of a point cloud which closely resembles a 3D model. The point cloud resembles a picture of the project.
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HIGH DEFINITION SURVEYING (HDS) AND LASER SCANNING
High-Definition Surveying or 3D Laser Scanning by GeoMap:
- Provides an ultra-fast, highly accurate alternative to traditional “as built” documentation.
- GeoMap uses latest-generation Leica ScanStation 3D laser scanning technology to capture and use high-definition spatial datasets ("point clouds.") for detail, As-Built and engineering surveys. This “intelligent pixilization” is widely applicable to civil, architectural, and facility projects.
- 3D laser scanning or high-definition surveying is useful as as a highly efficient way of collecting "point cloud" data for any survey application.
- Most importantly, it includes value added attributes not found in conventional survey techniques.The advanced capabilities of GeoMap’s 3D laser scanning system include 360º horizontal field-of-view (FOV), 270º vertical FOV, and a high-resolution, internal color camera that enables calibrated image overlays of the scanned scene. For a full 360° x 270° scan, the images alone represent >64 mega pixels of spatially rectified, true-color image data.
- 3D laser scanning or high definition surveying accuracy is 6mm at 50m; 2.0mm Standard Deviation for targets.
- Precise 3D detail created with the speed of light.
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This advanced surveying technology adds an exciting new dimension to survey applications including ALTA Surveys, as-builts, topographic surveys, roadway design projects, inspection reports, quality control, Forensic Surveys, quantities, and more. High Definition Surveys are very efficient as less field time is required and repeat trips to acquire additional data are esentially eliminated.
The fast maximum scan rate (200% faster than older technologies) facilitates exceptional productivity particularly for fast-track programs. 3D laser scanning or high definition surveying resolution is not compromised when surveyed objects move, so scanning can be performed without interrupting operations. GeoMap’s laser camera captures 4000 scanned points per second with full X-Y and Z (3D), creating a cloud of data positions. The subject can be as close as 12 inches – or as far as 1000 ft.
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