All You Need To Know About 3D Point Cloud

All You Need To Know About 3D Point Cloud

Today, massive land areas, tall buildings, complex infrastructure, historical sites, crime, and crash scenes, can now be effortlessly mapped through the use of 3D laser scanning and measured building survey service. The technology enables faster and more efficient data and 3D point clouds that are then transformed into a digital 3D model for a realistic representation of an object.

Point cloud is now widely used across all industries from engineering, construction, urban planning, transportation, and more.

Now if you want to know more about 3D point cloud, let our team at Leeds Measured Survey help you with everything you need to know about it.

What is Point Cloud?

Point clouds are a series of points that are similar to the pixels you know in a digital photograph. These points are made of three coordinates: X, Y, and Z, which represent the three specific positions in a 3D or three-dimensional space.

Typically, a point cloud file is comprised of millions of points when stitched together to represent a 3D shape or environment. The denser the points, the more accurate and highly precise the representation is. These captured cloud points can be imported into Revit software programs then registered for that 3D mapped model.

How Is A Point Cloud Captured?

The process starts by scanning the object with the use of a laser scanner done by certified technicians or a 3D scanning company. Using the Time-of-flight LiDAR, the distance and dimensions are measured by sending a pulse of light from a laser.

How long it takes for the laser to reach the surface and bounce back to the sensor is done through an accurate time. And the distance is calculated using the Distance = Time X Speed of light formula.

There are different types of 3D laser scanners all designed for specific applications. TLS or terrestrial laser scanners are to be used if needed to collect highly accurate point clouds specifically for analysing floor flatness or capturing a single object. Meanwhile, mobile laser scanners are building documentation projects or mapping factories. Mobile laser scanners offer 4mm accuracy and capture 3D point clouds while walking.

The market is flooded with a variety of laser scanners for specialised applications. We have different tools to cater to survey needs. At Leeds Measured survey, we have topographical surveys, large scale scanning, drone surveys, and measured building surveys.

Each pulse is added to the laser point cloud and is gathered together once the entire landscape or object has been scanned and measured.

Another method of collecting point clouds is through the use of photogrammetry, which uses photos in different angle shots, all used to calculate points. Photogrammetry is beneficial to your projects when it comes to providing quality and accuracy.

Both applications are popular, but the correct choice of approach is dependent on the type of project you are working on.

Uses Of 3D Point Cloud

Primarily, 3D point clouds are generated to create as-built 2D Drawings and 3D models.

The precise and accurate models out for 3D point clouds are used in different applications in various industries. In AEC (Architecture, Engineering, and Construction, point clouds from measured building survey scanning help in producing as-built drawings and models of the current conditions of building layouts.

The accuracy of these models can be used for materials procurement, estimation, cost planning, safety, and property management.

These sets of point clouds offer huge value in a wide range of applications. Floor planning, Building Information Modelling (BIM), progress tracking, and post-construction management are just a few of the most common uses of 3D point clouds.

Point clouds are easy to edit and filter as there are software available to do these. Second, point clouds are available in different formats such as FLS, E57, LAS, PTS, PTX, RCP, RCS etc., depending on what you want to use the data for, who needs it, and how long will the data be stored for.

Lastly, 3D point clouds like the rest of the technology are evolving. The growing need and development in technology will push 3D laser scanning technology and point clouds to research and drive for more improvements.

With more and more industries discovering the potential of point clouds, the technology is here to stay.

Now, if you are interested in finding more about the world of laser scanning surveying and building laser scanning, check out our resources for accurate, reliable information.


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    Author: Sonia
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