Merging state-of-the-art with heritage: bringing new life to a historical structure with 3D laser scanning

Author: Matthew Dowell, RM Surveys Laser Scanning/GIS Lead

马修·道尔先生是激光扫描和GIS铅RM Surveys. As a geospatial data specialist with international experience, Matt champions High-Definition Surveying across the architectural, engineering and construction industries.

RM Surveys, an Australian firm providing end-to-end survey solutions for commercial, resource and residential industries, is excited to be part of the newWestern Australian Museumconstruction project. The 395.9 AUD million project includes designing and constructing a new building that integrates with the existing heritage buildings; heritage restoration works to Old Gaol, Jubilee, Beaufort and Hackett buildings; and a public art project at the new Western Australian Museum site.

The dramatic new design links contemporary architecture with historic and heritage-listed buildings. The architects' main task was to merge the historic and heritage-listed buildings with the new state-of-the-art structures.

任务？四，最初由木材制成的遗产建筑需要结构钢，以增强和启用改进的展览。RM调查的任务是该项目的激光扫描组件，其中包括大型大厅，其中包括6,000平方米的画廊，参加了大型特别展览，学习工作室，空间，可以体验西澳大利亚博物馆幕后工作。

去没有其他激光扫描仪去过的地方

The RM Surveys team used a couple of Leica Geosystems solutions to capture, model and analyse the data. Starting with theLeica ScanStation P40survey-grade 3D laser scanner, the surveyors used the ScanStation P40 for the large halls due to its high accuracy in large spaces.

The Western Australian Museum project was the first opportunity to integrate their newLeica BLK360将激光扫描仪成像到项目工作流程中。

The team captured the roof space and the timber beams for a fabricated steel substructure which would be prefabricated and installed to support the 100-year-old timber beams and roof structure.

For this portion of the project, the BLK360 was the only laser scanner for the job as no other product could match the portability and access the confined hazardous work environment. The team also needed to navigate using the equipment while wearing special PPE and fall arrest devices.

“这个项目使我们能够在小空间中了解BLK360的功能。这是我们的团队唯一要捕获狭窄的空间的选择，挑战是保持安全性，准确性和范围。”

使用的RM调查Leica Cyclone寄存器360 post-processing office software to register and clean the final scan data.Leica Cloudworxwas used to work efficiently with the point clouds directly inside AutoCAD for the 3D modelling of the timber structures.

除了导航狭窄空间之外，另一个挑战是很难在屋顶上获得调查控制。成为遗产建筑意味着团队无法切割或进行任何屋顶穿透。

The team resolved this by usingLeica Cyclonecloud-to-cloud registration of the point cloud. Due to the confined nature of the roof spaces, survey control could only be placed at the access and egress points to the “crawl” spaces. For the elongated roof spaces, the team could remove a couple of tiles at the far end and shoot control from the street. This was to ensure the accuracy of the dataset, primarily the orientation, as the team moved down space (cloud-to-cloud can drift the orientation out).

The new Western Australian Museum opened its doors to the public on Saturday, 21 November, with a new building and a new name: WA Museum Boola Bardip. The museum was designed and built by Multiplex and Hassell + OMA, and recently shortlisted for an Australian Construction Achievement Award.