CASE STUDY

Transforming 3D data handling with 3Dsurvey

How advanced modules are revolutionizing accuracy and workflow efficiency

The large variety of 3D data collection methods may be hard to grasp at times, with new trends and technologies emerging every other day. Drones are revolutionizing data capture with access to inaccessible places, and automation is taking the industry by storm. Where there are large steps to be made, is in the maximizing of the value of data by combining data sources and types and managing this in a practical manner. Combining sources may not only lead to better quality, but also easier analysis and greater trust in data and value for its users. 3Dsurvey software unlocks the potential of this 3D data by enabling the combining of types of data and information from acquisition to delivery.

In this article, we look at two 3Dsurvey modules that aim to improve data collection, interpretation and analysis. These modules help surveyors to gather higher quality data with less effort and time spent in the field, following 3Dsurvey’s mission to offer a powerful spatial data processing tool in a simple-to-use and all-in-one platform. 

3Dsurvey Scan module with FARO Orbis

In the heart of Prague, a historic city known for its architectural splendour, a unique project unfolded inside an old house poised for renovation. Tasked with creating detailed floor maps and crosssections for construction documentation and design groundwork, the team at 3gon Positioning utilized 3Dsurvey software to realize a stunning result. This case study delves into the seamless integration of cutting-edge SLAM technology and the innovative 3Dsurvey Scan module, which simplified the data collection process using a handheld 3D scanner. With no need for extensive field preparations and the ability to easily process data from various scanner formats, the team achieved remarkable productivity, demonstrating the transformative potential of modern surveying methods in the realm of construction and design.

Objective

The primary objective of the project was to create detailed floor maps and cross-sections of a suite for construction documentation and as a basis for designers. The project aimed to leverage the software’s ability to generate X-ray views, which simplifies the drawing process by allowing the creation of floor maps directly on top of the point cloud data. The goal was to enhance efficiency in creating deliverables for clients while ensuring robust and precise data throughout the project.

Figure 1: Scan or photogrammetry, point cloud or mesh: the integrated CAD tool can be used to extract data.

Approach

Leveraging the capabilities of the 3Dsurvey Scan module, operators were able to initiate data collection immediately, bypassing the need for preliminary setup or calibration. The new module is compatible with a large variety of 3D laser scan formats, empowering surveyors to collect and work with data in-field with any ordinary laser scanner. To ensure accuracy and completeness of the data set during data collection, control points are brought into the loop. These control points, measured directly by the scanner, provided fixed reference points critical for the mobile scanner’s trajectory. This step was instrumental in refining the trajectory, resulting in a consistent and precise point cloud for the entire scope of the project.


The alternative approach would have been to use 3D CAD software to create a BIM model, based on which a specialist would create floor plans. As this is not a one-off process but repeated many times, the pay-off, which starts with the time gained in the first project, will increase rapidly.

Figure 2: X-Ray view empowers users to generate floor plans with ease.

Data processing

During the data processing phase, smooth tooling can help a project maintain its momentum. 3Dsurvey’s Scan module not only ensures that laser scanning projects stay on schedule, but also makes data processing efficient, insightful and even enjoyable. The added value of the 3Dsurvey Scan module during the data processing phase is its improved efficiency at many levels.

The module is easy to use, enabling even untrained 3D specialists to utilize the software and analyse the data. This saves time in-field due to independence of specialists, as roles in the team can be more freely divided.

As the 3Dsurvey Scan module incorporates CAD with full 3D scans, there will be far fewer cases of having to return to the field as all data is measured in the initial run, and remeasuring for CAD can be done at the office. The modules’ ability to provide X-ray views and draw CAD directly on the point cloud gives surveyors and data specialists all the tools they need to perform the job right and efficiently, first time round.

The Scan module is revolutionary as it offers seamless integration of 3D scanning and CAD drawing during the data processing phase of projects. The inspection site can be brought to the office, providing full control over data without being tied to specific scanner brands or types. This flexibility and universality streamlines workflows, enhances efficiency, and opens up new possibilities in data utilization.

Results

The use of 3Dsurvey software had a tremendous impact on the overall project outcomes. It allowed easy and fast drawing on the point cloud, without the need for trained 3D professionals. In terms of project  efficiency, accuracy and cost, there was a significant improvement. For example, in a small suite project, the time required using a 3D scanner and 3Dsurvey was only three hours compared to ten hours using classical survey and CAD methods. When compared to alternative methods, the results using 3Dsurvey were comparable, with the same final deliverable (2D plan). However, the advantage of 3Dsurvey was its ability to quickly modify and add additional details if requested by customers. The functions of 3Dsurvey simplified and enhanced the task, allowing users to open the 3D point cloud, create X-ray views and draw details. This ease-of-use for surveyors is something that characterizes 3Dsurvey software. 

The potential uses of 3Dsurvey photogrammetry software in future projects are vast. It is a modern tool that can be applied to a wide range of applications. Potential uses include mapping, volume calculations, digital terrain models, construction progress comparison, photovoltaic inspections and design, CAD drawing of facades, floor plans and cross-sections of buildings, point cloud presentations and editing, and data presentation on the cloud.

Figure 3: Use RTK videogrammetry for quick site documentation and enhance it with integrated CAD.

3Dsurvey RTK Videogrammetry module with Emlid GNSS

Utilizing the combination of a mobile phone and a precise RTK GNSS antenna, RTK videogrammetry allows for the recording of video footage with exact positioning in centimetres. The resulting video, embedded with accurate location data, is then processed through 3Dsurvey software to create detailed 3D point clouds and meshes. This technique is particularly advantageous in areas where drone flights are not feasible, offering a quick and user-friendly alternative. With the ability to be operated by virtually anyone, RTK videogrammetry bridges the gap between traditional surveying and construction professionals, providing a costeffective and efficient solution for a variety of applications, from volume calculations to construction documentation.

Objective

The primary goal of the project was to start using 3D data with simple and cost-effective tools, also on smaller projects. The aim was to document and capture the 3D reality in sufficient detail and precision using this accessible technology.

Approach

RTK videogrammetry has the benefit of requiring minimal preparation. However, when working in busy urban areas and construction sites, surveyors should plan their routes to first ensure their own safety, and second prevent any obstructions from blocking the frame during data capture. The equipment used in conjunction with the 3Dsurvey software included Emlid GNSS for RTK position in centimetres and an Android phone.

The equipment was set up and calibrated by measuring the offset of the phone and the GNSS antenna and entering the values in the 3Dsurvey application. During data collection, the RTK videogrammetry functions were utilized by capturing video footage of the site. Ground control points were placed on the site to ensure accuracy and completeness of the data. Smooth and steady movement during data capture was emphasized to achieve the best results: the trick is to think of yourself as a drone!

One of the challenges when using RTK videogrammetry is loss of RTK position. Solutions can be as simple as planning routes with few overhead obstructions, but also placing ground points as references beforehand where you know you will lose signal.

Data processing

3Dsurvey’s features make the processing of RTK videogrammetry similar to processing drone data, and intuitive for 3Dsurvey users. Easy and efficient data processing for videogrammetry is crucial when working on construction sites, as data collection can be a risky process and results need to be fast and reliable. The use of the 3Dsurvey RTK Videogrammetry module improved efficiency and accuracy compared to other methods, by offering a new way to capture 3D reality. It eliminates the need for a surveyor with expensive tools for every measurement. This provides more freedom and reduces dependency on surveyors, without impacting the reliability of the data.

As for any data processing software and workflow, the quality of the result relies on the quality of the incoming data. It is therefore crucial to ensure smooth and sharp video material, as well as ground points to cover potential loss of RTK position. 3Dsurvey software with the help of the RTK Videogrammetry module will then take care of the rest.

Figure 4: With the right approach, even larger buildings can be scanned and imported into 3Dsurvey.

Results

The quality and accuracy of the data obtained through RTK videogrammetry functions are ideal for mapping and documentation purposes, and during the projects provided a precision of up to 5cm. The level of detail captured allowed for the selection of points directly on the images, even if they were not visible in the point cloud.

The use of 3Dsurvey software significantly impacted the project outcomes by saving time, enabling data capture by construction/ utility personnel, reducing delays on construction sites, and saving money for contractors. The results achieved using 3Dsurvey were comparable to alternative methods, with the software’s functions simplifying and enhancing the overall task.

During this project, 3Dsurvey software contributed to the success of the project due to the simplicity of the mobile application, GNSS device and data processing in the module. The ability to pick points from images and the point cloud provided flexibility and ensured that necessary details were captured.

Conclusion

The modern-day surveyor is bombarded with new technologies, tools and software.3Dsurvey aims to be the guiding light in this market, helping surveyors to get the most out of their time and data. The Scan and RTK Videogrammetry modules are two examples of developments made by surveyors, for surveyors. Our team brings field experience to the software and helps the modernday surveyor utilize the latest surveying technologies in a practical and easy manner.

More information: 3DSurvey