Using laser scanning technology for retail redevelopment

Author: Bjorn (Bernie) Bernhardt，RM调查调查经理 - 建筑与HDS。

Bjorn is a leader in laser scanning and BIM technology with a wealth of experience in infrastructure and commercial construction projects, such as New Perth Stadium. He is a keynote speaker for industry and universities championing spatial technology survey solutions.

RM调查, an Australian firm who provide end-to-end survey solutions for commercial, resource and residential industries was excited to participate in its recent project when it was contacted by an architect firm about creating a survey-grade architectural and structural Revit BIM model for the redevelopment of the Kardinya Park Shopping Centre. After all, the firm had a newLeica RTC3603D laser scanner.

The Perth shopping centre is expanding and upgrading the facilities to elevate the overall appeal of the centre and to bring new shops, mixed-use amenities and a multi-deck covered parking to the local community.

客户需要为建筑师，工程师和设施经理进行修订BIM模型，以准确计划所需的工作。RM调查团队的任务是建筑师公司的任务，要捕获90,000平方米的现场区域，提供了一个完整的BIM开发水平（LOD）300，用于外部和LOD 200用于室内装饰，以进行一般计划，早期参与和咨询审查并帮助概念设计。

速度扫描和建模

RM调查团队使用了一些Leica Geosystems解决方案来捕获，建模和分析数据。在外部，该地点的西南角有很大的地形变化，并具有高固定壁。为了更好地捕获和表示3D空间中的复杂地形，RM调查团队使用了一些Leica GeoSystems解决方案来捕获，建模和分析数据。

从Leica ScanStation P40survey-grade laser scanner, the surveyors used the P40 for the external facades due to its long-range capability. It was the first project the team had an opportunity to integrate its new RTC360 3D laser scanner into its workflow.

Why the RTC360? The RTC360 was chosen for its portability, in-field pre-registration of captured data and strong visualising capabilities. During the day the team worked at a live shopping centre site, and with shoppers strolling around, the compact and sleek design of the RTC360 did not obstruct shoppers. Typically, when scanning, high-traffic areas such as shopping centres pedestrians create ‘ghost points’ which overlay the object of interest and need to be manually removed during the post-processing phase in the office. After the removal of these ghost points, they leave gaps of the missing points and are visible in the background of the final scan data. Utilising the Double Scan feature of the RTC360 meant that the data captured resulted in clean and complete point clouds and boosted productivity for the team.

集成RTC360的另一个优点取决于3D激光扫描仪的紧凑设计与扫描和Go uplift 500相结合，作为捕获天花板腔的现成解决方案。

The high-speed of the RTC360 was apparent to RM Surveys team when it comes to improving site workflow – the team doubled the number of scans they were able to do per day. The automated targetless field registration (based on VIS technology) and the seamless, automated transfer of data from site to office reduced the time spent in the field and the time the team had to spend on tightening the final registration, helping them eliminate a large portion of office work. To quantify the time saving, the team was able to complete the job 45% faster using the RTC360.

该团队每天使用RTC360进行大约150次扫描，其中大多数扫描以中等分辨率完成，而购物中心的一些较小区域则以低分辨率为单位。该项目总共产生了1200次内部和外部扫描。最初，团队的任务是完成外部工作。看到数据后，客户对可交付的印象深刻，以至于团队也被录用并能够在五天内完成内部扫描。

清洁了这些扫描中的捕获数据，并最终使用Leica Cyclone REGISTER后处理办公软件。Autodesk Recap用于生产LOD 200的RCP文件，并在Autodesk Revit中进行更多详细信息LOD 300建模。

Lessons learned

From the get-go, the team approached the project hoping that they would do the full scope and planned all the surveying methodology according to the full scope. This involved setting up a broad control network and involved drone capture, ground-penetrating radar and consultation with licensed surveyors.

In addition, the RM Survey team ensured that they were consulted as spatial consultants, as to what data would be used for moving forward.

重要的是要注意项目范围早期的咨询和沟通。对于RM调查团队，与从扫描仪P40和RTC360捕获的点云数据相比，这涉及有关无人机数据准确性的咨询。

By consulting and understanding this information early in the project, the team had the foresight for when three months down the track they would be asked by a fabricator if the Revit BIM model was suitable to use to fabricate steel from.

One piece of advice from the RM Survey team is to spend more time in the planning stage, considering multidisciplinary opportunities and foresee what the client’s future requests or questions might be.

By doing an external full site laser scan survey upfront, we were able to save the client time and money by producing information and drawings for multiple sub-contractors without the need for anyone to remobilise to site.

没有通过将RTC360，P40和Leica Cyclone寄存器的技术结合而实现的速度和数据富含速度和数据富的产品。没有这项技术，将使用传统方法完成大量调查，这些方法需要更多的时间，并为客户提供更少的信息。

该项目只是RM调查使用最新技术捕获现实并将其转变为3D模型的众多示例之一。