Visualising the destruction, creation of an Atlanta landmark

作者：Renata Barradas

The team atDarden & Companyhas been managing largescale construction projects in the Atlanta, Georgia, USA, area since 1999. Its portfolio includes the training facility of Major League Soccer team Atlanta United, the Arthur M. Blank Family Office Building, and several other large hotel, condominium, office and mixed-use buildings.

The biggest project to date was the construction of the Mercedes-Benz Stadium, the associated demolition of the Georgia Dome, and the construction of The Home Depot Backyard. That such an immense project was entrusted to a local firm is a testament to the confidence the Atlanta community has in Darden & Company.

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Documenting one of the largest covered stadiums

After the completion of Mercedes-Benz Stadium in Atlanta, Darden & Company was tasked with managing the implosion of the Georgia Dome — one of the largest covered stadiums ever built — and the subsequent construction of the recreation space that took its place. The firm discovered that Unmanned Aerial Vehicle (UAV) imagery and mapping services were just what was needed to keep the project on schedule and communicate with stakeholders from top to bottom.

The Georgia Dome was a70,000个座位的体育场in Atlanta. When it was built, it was the largest covered stadium in the world. The Dome was the home of the NFL’s Atlanta Falcons for24个季节, and in its time, it hosted more than1,400个事件attended by more than37 million spectators。梅赛德斯 - 奔驰体育场完成后，它在2017年11月被拆除83 feet（约25米）远。

The Home Depot Backyard is a44,515-square metre greenspacelocated on the former Georgia Dome site. It’s the perfect spot to tailgate before a Falcons game, see an outdoor movie, or attend a community festival.

佐治亚圆顶如何成为家得宝后院的故事是5,000磅（约2268公斤）炸药，大量的碎片和将近一年的辛勤工作 - 多维斯塔在那里记录了所有这些。

生成的数据包括：

• 33,085 Images captured
• 70 Aerial flyover videos produced
• 535 Gigabytes amount of data processed

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First challenge – Protecting the neighbours

佐治亚州的圆顶与北部的佐治亚州世界国会中心和南部的新梅赛德斯·本兹体育场接壤。拆除的主要考虑因素之一是验证这些建筑物并未受到内爆的破坏。

Project management firm Darden & Company was contracted to coordinate and oversee the many players contributing to the demolition of the Georgia Dome and the construction of The Home Depot Backyard. The team at Darden & Company hired Multivista to capture detailed imagery of the neighbouring structures and the Dome itself immediately before and after demolition.

“The implosion was meticulously planned to avoid damage, but we wanted to make sure we had a lot of images of the World Congress Center and the new stadium to use as a resource in case anything unexpected happened,”says Jason Hughes, senior vice president at Darden & Company.

Multivista used ground-based imagery and UAVs to visually document all three buildings just before and immediately following the implosion. Darden & Company shared access to all captured visual documentation with five partner firms for review and verification.

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Second challenge – Tracking material removal

当你摧毁一个70,000个座位的体育场，您会得到很多碎片。删除所有瓦砾并为家得宝后院带来新材料是一个巨大的挑战 - 但Darden＆Company凭借其无与伦比的LargesCale项目管理经验，远远超出了准备。

Darden & Company used Multivista to项目文档site using UAV mapping。Once a week, Multivista pilots would fly UAVs over the site, collecting visual data. That data was processed through an advanced photogrammetry engine to produce a map that could be accessed from within the Multivista platform. Project stakeholders were able to annotate the map, use it to测量距离，体积，面积和高程，并将捕获的数据导出到create 3D models。

“We’d take last week’s aerial map, compare it side-by-side to this week’s map so we could tell the volume, size and scale of what had been removed in the past week,”says Hughes.

“过去，我们可能会说‘哇，看起来那个瓦砾桩的动作都不是。’但这是一种主观的看法，这不是。我们将其从等式中拿出来，这使我们对该项目更加主动和知识。”

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第三挑战 - 与利益相关者进行沟通

Multivista的航空图像和正摩萨图对于与希望在不必访问该网站的情况下保持进度的项目利益相关者的沟通非常宝贵。休斯描述了每周的校长会议，项目利益相关者将审查最新的无人机地图并讨论下一步。

“We were able to communicate progress internally and externally using aerial data. ‘Yes, we’re on top of it,’ ‘Yes we’re managing it,’ ‘Yes, they hit their dates - and here is how we can tell,’”said Hughes.

In addition, the aerial imagery turned out to be a great way to send updates to Arthur Blank, co-founder of The Home Depot and owner of the Atlanta Falcons.

“Mr. Blank loved seeing the aerial pictures with our weekly updates,”says Hughes.“We used them to communicate progress, so he could ask questions. There’s no better tool for communication than these aerial images.”

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可视化采取多种形式

Darden & Company used Multivista for a wide range of services on the Georgia Dome implosion and The Home Depot Backyard, as well as the construction and facilities management of Mercedes-Benz Stadium.

These services spanned over four years and included site surveys, interior and exterior progressions, pre-slab, underground utilities, and MEP Exact-Built® documentation, owner training videos, and live-streaming webcams. Deliverables to document this four-year transformation included:

• UAV images
• UAV flyover videos
• Aerial mapping
• Photo
• Video
• Live-stream webcam
• Webcam time lapse

“最初，我们正在谈论建立一个网络摄像头，供猎鹰在公共关系方面使用，只是为了给球迷提供最新，最伟大的摄像头。”says Hughes.“But because we were working on multiple projects, we knew we could use Multivista to manage the day-to-day activities. It was a pretty easy decision on the front end and we’ve definitely gotten our value out of it.”

家得宝后院于2018年9月准时向公众开放。