Highway construction in Norway

If you plan on driving from Kristiansand via Stavanger and Bergen to Trondheim, strap in for an approximately 1,100-kilometre ride that can take you up to 21 hours in the car on the European route E39. Due to the seven mayor fjords that must be crossed by ferry you get as well an extensively insight in the beautiful landscape of west Norway as the trip can get very protracted.

When the United Nations Economic commission for Europe (UNECE) decided 2008 in their “European agreement on main international traffic arteries” to create international standards to highway networks, the plan to expand the E39 was set. In the agreement, the “National Transport Plan” of the Norwegian government with the aim to upgrade the E39 to a road with an average speed of at least 80 to 100 km/h, a lane width of 3.5 meters and to avoid any ferry traffic.

为了将E39的旅行降低到10.5小时，挪威公共道路管理局或“ Statens Vegvesen”正在考虑在峡湾安装悬架或浮动桥或次级浮动隧道，以取代渡轮交通。将近230亿欧元的基础设施项目将在3700米的主要跨度或世界上第一个越过Sognefjord的淹没浮动隧道上生产世界上最长的悬架桥。

The project began in early 2015 to transform the current two-lane high-way to four-lanes with an 11-km tunnel along with other road construction works. The entire project is scheduled for competition by 2035.

为了按计划进行施工并提供承包商的监督，Statens Vegvesen签约了Hawkeye AS，一家调查公司，专门从事3D可交付成果的最终文件以及Samnøy的Veseth AS和Samnøy的RuneSamnøy的合资企业，以提供该项目的正交动物和模型。为此，2014年创立的公司转向Leica Geosystems UAV（无人驾驶飞机）解决方案，以收集所需的图像，以跟踪大众运动的成本，记录进度并使利益相关者保持最新状态。在飞行多感官平台上使用最先进的技术有助于捕获尽可能多的细节以创建细谷物数据。

从上方的360度视图

Capturing data every two weeks with routine positions throughout the firm’s five-year contract on the project from January 2015 to January 2020, Veseth AS has created its own online gallery of 360-degree images taken with Leica Geosystems UAV solution and a special installation to mount a Nikon D800. To date, the gallery onhttp://360aircamdrone.net/e39sr/hosts more than 100 photos since November 2015. The photos, taken at centimeter accuracy, are used in all construction meetings, helping Statens vegvesen to plan each step of the project. Project management uses the photos for quality control purposes with contractors and other stakeholders. The website is also a novelty when it comes to communication with the public. To increase transparency the public platform gives insights in the current project status, scheduled tasks and into important steps.

To create reliable and repeatable data on fixed positions, the company uses the in-house built flight planning software to adjust waypoints, height, rotation and angle of the camera. The software also provides information over the estimated duration of the mission, the envisaged route and with which GSD (Ground Sampling Distance) the pictures are taken.

“Providing aerial imagery from an UAV is new for us, and the excellent resolution of the pictures of different construction areas is helping the overall project to flow smoothly,” said Mads Solberg Eriksen, Statens vegvesen quality advisor. “The 360-degree view possible with Leica Geosystems UAV makes project documentation easier and faster.”

Seeing the whole picture

Hawkeye AS and Veseth AS are particularly known for its volume calculation of terrain both above and below water. As a major challenge to the project has been the mass removal of non-native plants to the natural habitat during the construction of the 11-km tunnel, the firm has been combining several Leica Geosystems solutions for precise volume calculations and documentation. Whereas Leica Geosystems UAV provides a clear view with its 36.3 megapixel Nikon D800 from above for quality control, the firm uses a Leica Geosystem C10 ScanStation and Leica Geosystems Cyclone software to create detailed 3D models of the mass to be removed. The Leica Geosystem TS16 total station and GNSS solutions provide accurate measurements for quantity surveys. With the accuracy of the Leica Geosystems ScanStation C10, the laser scanner generates detailed point clouds even on long range up to 300m with its full 360º x 270º field-of-view.

“借助Leica Geosystems解决方案，我们能够为客户提供比以往更快的最新信息，” Veseth担任首席执行官兼合资公司Hawkeye AS的一部分的Stian Veseth说。“我们能够依靠每天应有的解决方案，并且我们可以完全访问我们用来保持业务领先的经验专业人士网络。”

将各种解决方案结合在一起，公司始终能够从地面上方和峡湾水下为客户提供工作场所的完整图片。E39高速公路的重建是挪威历史上最大的基础设施项目之一，这证明了无人机如何称赞传统的测量实践，从而对所发生的事情进行了更大，更清晰的情况。