遗产bim模型，以证明歌剧院

作者：Hazlinda Mohd Nuron

The Saigon Opera House, one of Ho Chi Minh City’s most elegant and historical cultural assets, has a new digital identity to manage, preserve and protect this iconic building.

备受喜爱的市政表演艺术场地由建筑师Eugene Ferret建于1898年，并以巴黎的Petit Palais为蓝本，也是传统的旅游胜地。由于其位于越南南部繁忙的城市中心，该建筑被确定为处于危险之中。

Work carried out on the Metro beneath the theatre might further degrade the historic structure. Accurate digital condition surveys were needed to help the authorities successfully manage future renovations or even a complete reconstruction.

大火几乎摧毁了巴黎的巴黎圣母院大教堂的消息给了该项目的额外动力。

The General Director of Vietnam’s Portcoast Consultant Corporation, Mr Pham Anh Tuan, took responsibility for the work, assembling a 30-strong survey and engineering team to tackle it.

Tuan先生凭借了以前的Leica Geosystems产品的丰富经验，选择了Leica Geosy亚搏彩票手机版下载stems的总站，GNSS和3D Laser扫描仪的机队，以及最新的集成软件，以实现该项目的雄心勃勃的目标亚博5分钟快三。

一种三步的方法

The first phase of work was to construct a base heritage-BIM model. As the original design documents and structural drawings had been lost over time, two data sets from different sources were required.

现有结构的原始空间数据是使用大地设备，相机，无人机和3D激光扫描仪收集的，而技术，历史信息则来自国家档案馆和研究中心。

The second phase involved the modelling and processing of point cloud data to construct a 3D digital representation of the current status of the theatre. Additional information on colours, materials, patterns, as well as details of origin, history and cultural significance were integrated to create a complete BIM model.

The third and final phase utilised the BIM model to create a precise 3D visualisation, which could be shared with stakeholders, usingLeica TruViewand JetStream Viewer.

图安先生说：“The digitalised deliverables could only be achieved with cutting edge equipment and software. Using the resulting BIM model we created a precise reality capture visualisation using VR (Virtual Reality), AR, (Augmented Reality), and MR (Mixed Reality) techniques, ultimately sharing this with stakeholders and the public through an impressiveinteractive virtual tour,featuring an accurate 3D model of the Saigon Opera House.”

该项目的所有阶段都使用了广泛的Leica Geosystems软件组合：Leica Infinity用于搜索点云数据，leicaCyclone 3DR创建雕像和浮雕的数字模型和莉卡CloudWorxplug-in for Revit to add the top roof frame truss system to the BIM model.

捕获内外现实

用一个Leica Nova TS60，twoGNSS GS18 t, oneiCON iCR80和两个iCON gps70,the survey team set up over 350 georeferenced scanning stations to accurately capture point cloud data, from the stage and auditorium to the roof dome, basement, and outer walls.

由于无法物理爬上屋顶，因此使用起重机来抬起Leica Scanstation P503D laser scanner into position to capture up to 1km of the area around the opera house in High-Dynamic Range (HDR) imagery and survey-grade quality.

对于复杂的内部几何形状，尤其是在狭窄的阁楼和地下空间中，快速扫描时间，准确性，稳定性和可操作性是必不可少的Leica RTC360and theLeica BLK360是理想的。

四个Leica RTC3603D激光扫描仪用于柱，雕像，浮雕，图案，吊灯和外部细节。BLK360的光线和紧凑的设计克服了扫描位于密闭阁楼空间中的空调系统的挑战。

“The accuracy of measurement and the density of the measured points was a key factor in our choice of hardware. High efficiency, flexibility and reliability of this equipment saved us time and manpower in every aspect of the project from initial control and georeferencing to the laser scanning and registration process,”said Mr. Tuan.

无价的投资回报

Confidence in Leica Geosystem’s digital technology amongst Portcoast’s young engineering team has engendered a renewed sense of pride in the history and cultural values the building represents.

Mr. Tuan explains,“In the event of a catastrophe, the entire structure could be rebuilt from the digital record. When necessary in the months and years to come, the digitalised data can also be used to print 3D models needed for high accuracy casting to replicate the original decorative features. Digitalisation has ensured the beauty and majesty of the Saigon Opera House will continue to inspire future generations of residents and visitors to the city.”

在这个遗产项目取得成功之后，市政当局现在具有考虑将数字文档方法应用于胡志明市历史，文化和艺术意义的150座建筑物。