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 1. Home
 2. Geospatial Blog Articles
 3. Video: What Is a Point Cloud?


BLOG


VIDEO: WHAT IS A POINT CLOUD?

Published Date January 13, 2021 Author Trimble Geospatial



Maybe it’s time to ask that pointed question: What is a point cloud?

The first thing to know is that point clouds are born of data – lots and lots of
data, better known as a dataset. 

Each point in a dataset represents a set of X, Y and Z geometric coordinates and
an intensity value, which records the strength of the return signal based on
surface reflectivity. When combined, these points form a point cloud, a
collection of data points in space that represent a 3D shape or object. Point
clouds also can be colorized automatically for more realistic visualization.

 


PURPOSES FOR POINT CLOUDS

So, what does one do with a point cloud? 

So much. Point clouds are used for many purposes, including visualization,
animation, rendering, and CAD models. In geospatial workflows, point clouds are
used for deliverables including topographic and bathymetric maps, digital
elevation models, digital terrain models, 3D CAD and Building Information Models
(BIM), point cloud, and imagery viewers, and animation and virtual reality.

Accurate geospatial data is invaluable for:

 * monitoring and validating new construction,
 * reconstruction or renovation of buildings, plants, and civil infrastructure,
 * forensics investigations of crime scenes so they are undisturbed and evidence
   is permissible in court,
 * accident recreation that is safe and fast to reduce road closures,
 * preserving and restoring cultural heritage sites for generations to come,
   and,
 * countless more.

So, in the most basic sense, point clouds are digital representations of the
real world, and the data is truly incomparable. 





CAPTURING DATA POINTS

The data that form point clouds are collected in a number of ways, including
cameras in total stations, terrestrial and airborne laser scanners, unmanned
aerial systems (UAS), mobile mapping systems, snapshot images, and videos from
hand-held controllers, and smartphones and computer-aided design (CAD) programs
that generate surface and structural models.


ANALYZING POINT CLOUD DATA

Point clouds can be large and may exceed hundreds of gigabytes in size. This is
where powerful software solutions are necessary for efficient point cloud
processing, analysis, and data export. 

Secure storage and data sharing are also essential for successful project
collaboration. This is where cloud-based solutions make a difference, providing
easy access to visualize and interact with the point cloud in a productive way.



Product examples:

 * Enhanced Trimble VISION™ technology available with Trimble SX10 and Trimble
   X7 is used to colorize point clouds.
 * The Trimble X7, Trimble TX8 3D Laser Scanner and Trimble SX10 have scan
   options to set the scan density.
 * The Trimble MX9 Mobile Mapping System has dual lasers capable of capturing
   500 scans/second at highway speeds for mobile mapping. 
 * Trimble RealWorks and Trimble Business Center are used for efficient point
   cloud processing, analysis and data export. 
 * Trimble Clarity is a cloud-based solution for easy access to visualize and
   interact with the point cloud in a productive way.

To learn more about point clouds, watch our video above, part of our Geospatial
101 video series.

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 * Previous Article
   
   Save and Repeat Trimble SX10 Scans
   
   If you are using Trimble SX10 scanning total stations with Trimble Access
   2020.20 to scan the same area multiple times, you can now quickly and easily
   repeat scans.

 * Next Resource
   
   El Mejor Sistema de Monitoreo de Presas de la Industria
   
   Las minas e infraestructuras energéticas, como las presas, requieren
   monitoreo continuo y sistemas de alarmas.


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