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What are the benefits and challenges of using 3D laser scanning for as-built surveys?

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As-built surveys are essential for documenting the actual conditions of a construction project after completion or during different stages. They provide accurate and detailed information for various purposes, such as quality control, compliance, maintenance, renovation, or dispute resolution. One of the most advanced and efficient methods for conducting as-built surveys is 3D laser scanning, which uses a device that emits laser beams and measures the reflected pulses to create a digital representation of the physical environment. In this article, we will explore the benefits and challenges of using 3D laser scanning for as-built surveys and how to overcome some of the common obstacles.

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1 High accuracy and speed

One of the main advantages of 3D laser scanning is that it can capture the geometry and dimensions of complex structures and features with high accuracy and speed. Unlike traditional surveying methods that rely on manual measurements and observations, 3D laser scanning can scan millions of points per second and produce a comprehensive and precise point cloud that represents the as-built condition. This reduces the risk of human error, missing data, or discrepancies between the design and the reality. It also saves time and resources by minimizing the need for multiple site visits, rework, or additional measurements.

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Jasen Hunt

CEO @ Land Survey Drafts || I Help AutoCAD Drafters Secure A CAD Job Earning up to $100K per year || LandSurveyDrafts.com
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Benefits of 3D laser scanning for as-built surveys include high precision and accuracy, enabling precise representations of existing conditions. This technology also offers time efficiency, reducing on-site data collection time compared to traditional methods. Comprehensive data capture capabilities allow for detailed information collection, including complex geometries and hard-to-reach areas, enhancing design and analysis processes. Additionally, 3D laser scanning minimizes disruption to regular site operations and improves safety by reducing the need for workers to access hazardous areas.

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Ryan Keefer

Empowering Visionaries with Aerial Innovation: Leading AirView Source as Managing Director
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The main advantage of 3D laser scanning lies in its ability to swiftly and accurately capture complex structures and features. Unlike manual methods, it can swiftly scan millions of points per second, generating a precise point cloud that mirrors the actual conditions. This minimizes human error and discrepancies between design and reality, ultimately saving time and resources by minimizing the need for repeated site visits or additional measurements.

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Florin-Samuel Coltouan

#YesWeScan
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Hauptvorteile beim 3D-Laserscannings sind, die Menge an Messpunkten, die Genauigkeit dieser und die Zeit, welche es dazu braucht. Wenn mobile Laserscanner verwendet werden, da spielt der Zeitgewinn eine weit gr??ere Rolle. Zudem gibt es mobile Laserscanner, welche LiDAR mit 360° Panorama Fotos kombinieren. Dadurch hat man den Vorteil der Vermessung in Rekordzeit inkl. hochaufl?sender Fotos, welche die Punktwolke auch Fotorealistisch einf?rben. All diese Aspekte steigert die Genauigkeit des daraus erstelltem (BIM) Modell. Passende Cloud L?sungen bieten eine, auch für den Laien, einfach zu bedienende Plattform, welche keine spezielle Hardware für die Benutzung dieser gro?en Datenmengen ben?tigt.

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2 Rich data and visualization

Another benefit of 3D laser scanning is that it can provide rich data and visualization options for as-built surveys. The point cloud data can be processed and analyzed using various software tools and applications, such as CAD, BIM, GIS, or VR. This allows for creating realistic and interactive 3D models, maps, or simulations that can enhance the understanding and communication of the as-built condition. For example, 3D laser scanning can help compare the as-built and the design models, identify deviations or defects, perform clash detection or quality assessment, or generate reports or documentation. It can also enable immersive and collaborative visualization experiences that can improve the decision-making and problem-solving processes.

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Ryan Keefer

Empowering Visionaries with Aerial Innovation: Leading AirView Source as Managing Director
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3D laser scanning not only offers precise data capture but also provides diverse visualization options for as-built surveys. The captured point cloud data can be analyzed using various software tools like CAD, BIM, GIS, or VR, enabling the creation of realistic 3D models, maps, or simulations. These visualizations enhance understanding and communication of the site's condition, allowing for comparison between as-built and design models, defect identification, clash detection, and quality assessment. Moreover, immersive visualization experiences facilitate collaborative decision-making and problem-solving.

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Florin-Samuel Coltouan

#YesWeScan
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Trotz immenser Daten bieten Cloud L?sungen eine einfache Verarbeitung und Visualisierung dieser. Die Integration der Punkwolken in CAD / BIM Programmen erm?glicht eine detaillierte Modellierung und ein daraus pr?ziseres Modell, welches erstellt werden kann. Punktwolken k?nnen mir dem ursprünglichen Modell überlagert werden, um Fehler oder Kollisionen aufzeigen zu k?nnen und helfen bei einer Frühzeitigen L?sungsfindung. Durch die Kombination von 360° Panoramas und der f?rbigen Punktwolke ergibt sich ein wesentlicher Mehrwert für in der Visualisierung und Inspektion des Objekts, ohne vor Ort sein zu müssen.

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3 Technical and operational challenges

Despite its benefits, 3D laser scanning also poses some technical and operational challenges that need to be addressed and managed. One of the challenges is the complexity and size of the point cloud data, which can require specialized hardware, software, and skills to handle and process. Depending on the scope and scale of the project, the data storage, transfer, and integration can be challenging and time-consuming. Another challenge is the quality and accuracy of the data, which can be affected by various factors, such as the scanner settings, the environmental conditions, the site accessibility, or the interference from other objects or sources. Therefore, it is important to plan and execute the scanning process carefully and follow the best practices and standards for data collection, processing, and analysis.

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Florin-Samuel Coltouan

#YesWeScan
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Die Verarbeitung reiner Punkwolken bedarf insbesondere bei der Visualisierung, performante Workstations mit einer entsprechenden Leistung. Bei Cloud L?sungen entfallen diese teilweise. Die Genauigkeit der Punktwolken h?ngt vom verwendeten Laserscanner, der verwendeten Technikern beim Scannen selbst und der zus?tzlich mit einbezogenen Kontrollpunkten, welche mit einer pr?zisen Totalstation oder einem GNSS aufgenommen wurden. All diese Aspekte k?nnen die Genauigkeit stark verbessern und ein sauberes Ergebnis liefern. Die Datenmenge ist auch nicht zu vernachl?ssigen und insbesondere das Sicherungskonzept dahinter, um die Daten auch lange nach der Aufnahme bereit zu haben.

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Ryan Keefer

Empowering Visionaries with Aerial Innovation: Leading AirView Source as Managing Director
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While 3D laser scanning offers remarkable advantages, it also presents certain technical and operational hurdles. Managing the complexity and size of point cloud data requires specialized hardware, software, and expertise. Additionally, data storage, transfer, and integration can become cumbersome, particularly for extensive projects. Maintaining data quality and accuracy amidst various environmental factors and site conditions is another challenge. Proper planning and adherence to best practices are crucial for successful data collection, processing, and analysis, ensuring optimal outcomes despite these challenges.

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4 Legal and ethical issues

Another aspect to consider when using 3D laser scanning for as-built surveys is the legal and ethical issues that may arise from the collection and use of the data. Since 3D laser scanning can capture detailed and sensitive information about the physical environment, it may raise concerns about the ownership, privacy, security, or liability of the data. For example, who owns the rights to the data and how can they be shared or transferred? How can the data be protected from unauthorized access or misuse? How can the data be verified and validated for accuracy and reliability? How can the data be used as evidence or proof in case of disputes or claims? These are some of the questions that need to be clarified and agreed upon by the involved parties before conducting or using 3D laser scanning for as-built surveys.

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Ryan Keefer

Empowering Visionaries with Aerial Innovation: Leading AirView Source as Managing Director
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Incorporating 3D laser scanning into as-built surveys necessitates navigating legal and ethical considerations surrounding data ownership, privacy, security, and liability. Detailed data capture may prompt inquiries into data ownership and usage rights. Moreover, safeguarding data from unauthorized access or misuse becomes imperative. Ensuring data accuracy and reliability is crucial for its validity as evidence in potential disputes or claims. Addressing these issues requires clear agreements and protocols established among stakeholders prior to initiating 3D laser scanning for as-built surveys.

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5 Cost and value

One of the most common questions that may arise when considering 3D laser scanning for as-built surveys is the cost and value of the method. 3D laser scanning can be seen as a costly and complex investment that may not be feasible or justified for every project. However, it can also be seen as a valuable and beneficial investment that can provide significant returns and advantages in the long run. The cost and value of 3D laser scanning depend on various factors, such as the project scope and objectives, the available budget and resources, the expected outcomes and deliverables, or the potential risks and opportunities. Therefore, it is important to evaluate and compare the costs and benefits of 3D laser scanning with other alternatives and determine the optimal solution for each project.

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Ryan Keefer

Empowering Visionaries with Aerial Innovation: Leading AirView Source as Managing Director
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Assessing the cost and value of implementing 3D laser scanning for as-built surveys is a critical consideration for project stakeholders. While the initial investment may seem substantial, the long-term benefits and advantages can outweigh the costs. Evaluating factors such as project scope, budget, expected outcomes, and potential risks helps determine the feasibility and justification of 3D laser scanning. By comparing costs and benefits with alternative methods, stakeholders can make informed decisions tailored to each project's needs and objectives.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are the benefits and challenges of using 3D laser scanning for as-built surveys?

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3

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1 High accuracy and speed

2 Rich data and visualization

3 Technical and operational challenges

4 Legal and ethical issues

5 Cost and value

6 Here’s what else to consider

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