How Hollis Captures, Processes, Manages and Delivers Reality Capture data

作者：Renata Barradas

数据处理和生产CAD和其他可交付成果是否会使您头疼？

Reality Capture experts know that capturing data is just one step in the process. Processing, managing and delivering data are part of the workflow. Processing and producing CAD and other deliverables can sometimes be the most time-consuming parts of the workflow.

Tim Beach, Chartered Geomatics Surveyor and Measured Building Specialist from Hollis, has been relying on laser scanning in the U.K. since 2003. Hollis is a leading firm of independent real estate consultants with 24 offices in the U.K., Ireland and mainland Europe. Beach is based within the Measured Survey team and is responsible for AEC level-detail projects.

Within his role, he gets to test hardware and software to ensure the solutions are as efficient as possible for their clients. Beach has successfully incorporated laser scanning into existing measured building survey workflows at Hollis.

Within its 25-service offering, Hollis’ measured services integrate into several of the others, such as mechanical, electrical and plumbing engineering (MEP) where the team uses laser scanning for plant and environments requiring Revit modelling for clash detection exercises. The unit uses laser scanning for other applications, such as the rights of light (ROL) analysis to examine impacts of new developments, project management for refurbishing and redevelopment of existing buildings.

Hollis owns several Leica Geosystems equipment, including:

• 2Leica Scanstation P40s
• 3Leica RTC360 3D激光扫描仪
• 2Leica TS16和4个Leica TS12总站bob apple
• 3Leica Builder Total Stations
• 2Viva GS16 GNSSand 4 Viva GS08 plus GNSS
• 4Leica Cyclone REGISTERand旋风寄存器360，2Leica Cyclone MODEL, 12CloudWorx for AutoCAD, 12JetStream Connectors，2Cyclone PUBLISHER PRO.

“Hollis has invested quite heavily in Leica Geosystems equipment in recent years. Having tested various hardware and software providers, we chose Leica Geosystems. We found Leica Geosystems gave us the solution that fits best into our business model. We have a number of ScanStation P40’s, total stations and GPS for control and putting our surveys in the correct location海滩说。

Laser scanning a 180,000-square-feet building

The challenges of laser scanning an 11-floor 180,000 sq.ft. building in central Birmingham, U.K., go beyond the building itself, including finding locations which provided visible access to each face of the building in an already congested area. Hollis opted for laser scanning given the scale of the building, its complexities, and the client timescales and deliverables.

To scan each of the rooms on every floor, Hollis had to coordinate access arrangements with all tenants. “激光扫描与准确的调查控制能力使我们能够在建筑物周围移动，扫描当时我们可以访问的区域所需的东西，知道我们能够在结束时一起注册捕获的扫描数据，并且确信我们能够获得正确的结果，”said Beach.

The deliverables requested by the client included standard 2D CAD information of floor plans, elevations and cross-sections. During the project, the client required additional information, including structural soffit and slab details in various locations, a full topographical survey of the immediate surroundings, façade deviation reports and monitoring work.

Data Capture

由于截止日期的紧迫，霍利斯（Hollis）用Leica Scanstation P40部署了两支球队，并在短短五天内完成了调查。需要八天的现场捕获建筑物的内部，再加上一天以安装围绕该物业的调查控制并进行外部激光扫描。该团队充满信心地收集了数据，而无需过度调查控制，从大约1,500个扫描位置产生了90 GB的原始数据。Viva GS08加RTK GNSS用于地理参考站点周围的多个点，以将数据转换为军械调查网格和数据。

Processing Data

Hollis began registering the captured scan data after the first site inspection day. The two survey teams on-site sent the collected raw data at the end of each day to the local office to begin import and registration. All registration elements were carried out during the day and auto alignments left to process overnight. This workflow minimised the processing time and permitted the team to start the CAD work early on. In total, Beach’s team took six days for registration, resulting in a final database of 259 GB.

Beach and his team registered all scans using Cyclone REGISTER with local control and cloud to cloud techniques. Cyclone REGISTER allowed the team to split the registration into logical parts and combine them to generate a final master data set.

“我们发现，云到云提供了网站工作中最大的灵活性和具有如此复杂几何形状的建筑物的注册。能够将您的数据一起注册，并与P40一起使用双轴补偿器，确保我们是confident that the data we are producing is correctly orientated and we don’t have any issues downstream. […] Cyclone REGISTER gave us an incredibly flexible approach to how we undertook the registration,”said Beach.

管理数据

霍利斯（Hollis）在分布在多个办公室的测量服务团队中有30名员工，他们可能在任何给定时间都需要任何给定项目的数据。为了为客户生成可交付成果，跨区域团队使用高性能流和集中式项目平台合作，通过内部和外部网络访问数据-Leica Jetstream。使用此简化的点云访问Hollis测量的调查专家可以在CAD应用程序中实时导入和渲染全密度点云数据，并与各种利益相关者共享JetStream Viewer文件。使用这种方法，房地产咨询公司简化了项目的合作。

"The use of Leica Jetstream has allowed us to host our data centrally in London, where everyone can access. If our regional offices undertake a scanning project, they can upload to the JetStream Server overnight, opening up the data to everyone else. For other teams who are not power users of scan data but occasionally need to use the data, we can host and archive their project's data,"said Beach.

使用Leica Jetstream使团队能够在各个位置的各个团队之间传播最终数据集，以按时和预算完成项目。“JetStream enabled us to complete the project in the most efficient manner and as accurately as possible.”said Beach.

Delivering data

Surveyors generate a great amount of data using laser scanning that is captured, processed and managed to provide actionable data that supports decision-making.

Leica TruView is the collaborative tool Hollis surveying team relies on to share point cloud data and design models. One of the many uses for TruView within Tim’s team is as a Q&A tool to ‘walkthrough’ models and for checking congested environments remotely and safely.

“莉卡TruView provides a location-based view of data from the sites. We use it to produce the deliverables using all information available – not just relying on slices in CloudWorx where features can be missed. For the building project in central Birmingham, our team could split the data logically by building and by floor. TruView allows viewers to measure, add geometry, incorporate hot links and embed geotags for asset management needs,”said Beach.

从数据收集到交付的完整端到端解决方案

Using a complete reality capture workflow from Leica Geosystems, Hollis produced deliverables of floor plans, sections, and elevations for its client in the most efficient manner. Through re-use of previously-collected data, the team could accommodate the clients’ additional requirements very quickly. Geared with JetStream surveyors saved time by loading and accessing data from one central location, helping to deliver the project on time and budget.

观看海滩，解释Hollis如何将硬件和软件集成到网络研讨会中的不同项目“Increasing productivity and collaboration with Leica Geosystems total software solution.”