guide to 3d laser scanning
Why Use Laser Scanning?
Laser scanning has become one of the most cost-effective, and time-efficient methods to accurately capture existing conditions safely. It automates the process to quickly collect millions highly accurate measurements. The earlier you have accurate reliable document of the existing condition the sooner you can make informed decision, which will affect your budgets and schedules. This guide explains what you need to know to be confident using 3D laser scanning on your next project.
Technologies
There are many technology options for capturing the as-is conditions. Each are fit for purpose and it is important to select the right technology or combination of technologies for your project.
Terrestrial Uses a stationary scanner on a tripod. Many scan locations are used to capture the environments and located with respect to each other. This is known as structured data. A point cloud is created, but points are owned by a scan location. These point clouds are highly accurate, capture a large area and can have color photos applied to them.
Mobile The measurement capture hardware is constantly moving. The point cloud is created by locating the points using GPS or continual registration technology. This is known as unstructured data. It can capture a large are quickly, but accuracy will be less accurate than terrestrial scanning.
Handheld These scans are used to capture smaller areas and ones that are hard to reach with other scanners. They continually track positioning to locate the points. This is also known as unstructured data. These point cloud are quick to capture, but are less accurate than terrestrial scanning.
Workflow
It is important to adhere to a proper workflow to ensure that consistent quality data is delivered. Small amounts of variance can propagate over a large distance.
Plan Understand the scope of the project is important. It is best to walk down the site if the schedule permits. Otherwise a site plan and pictures are helpful in defining the areas of importance.
Capture Plan the work, then work the plan. The team will capture the scans mapped out in the planning phase, but needs to have the vision and experience to add scans when needed.
Register Is the process of locating and orientating the scan with respect to each other and to the site coordinate system. This step also includes cleanup of the point cloud, colorization if available and the production of the deliverable file set.
Manage Point Clouds may be captured for a specific project, but they can have value beyond their initial role. It is important to document the capture dates to evaluate the useful life of the scan. Demo-ing volumes of points to remove objects from the scan will ensure that it is evergreen. Add intelligence to the point cloud.
Integrate Combining the point cloud of the as-is condition with your proposed 3D design is where the power of using 3D laser scanning is revealed. Clashing the proposed design against the point cloud will ensure that you aren’t interfering with exist facility.
Value after the Project
Retaining and maintaining a trusted living point cloud for an asset can be used for operations, training and planning future projects. Combining the point cloud with the 3D model creates a digital asset. Each physical asset should have a digital asset.
We are here to help
At Baseline 3D Scanning, we are a valuable resource for helping to evaluate 3D scanning technologies. We’ll partner with you to start evaluating 3D laser scanning technology. See how a digital asset can transform your organization.
If you have a Vision We will help you to turn it into reality
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