少的道路少：与Leica Pegasus的山路创新数字化：两个终极

移动映射解决方案业务经理Raphael Goudard

The alpine roads in Berchtesgadener Land, Germany, offer some of the most breathtaking views in the world. As the gateway to tourist areas in the southeastern tip of Bavaria, it’s vital to the local economy that the roads are kept in a good condition. The responsibility for that falls to The Traunstein State Building Authority (TSBA). TSBA manages the alpine roads in addition to a network that includes hundreds of kilometres of federal and state roads, walking and cycling paths, bridges, support structures and tunnels. A pioneer in using digital methods, TSBA wanted to create a digital record of the area as a basis for planned construction work. The Authority askedIng Geovision, surveying and geospatial data management experts, to survey a 3.2 km stretch. After exploring options,Ing Geovision使用Leica Geosystems移动映射解决方案来数字捕获道路及其挡土墙。该项目是第一次将移动映射应用于此类挑战。

Challenging physical constraints for data capture

在某些地方有23％的坡度，并散落到下面的山谷中，伯奇德纳纳（Berchtesgadener Land）的道路并不容易进行调查。由于它们建在陡峭的茂密的地形上，因此很难进入挡土墙的两侧。由于海拔和偏远度，几乎整个距离的GNSS信号较弱，尤其是在调查区域中包含的五个隧道中。除了身体上的约束之外，还需要迅速进行调查。这条道路不能长时间封闭或封锁，以使旅游巴士的路线免费。然而，由于从调查中获得的数据被用作计划建筑工作的基础，因此需要以最大的准确性来记录道路和墙壁。

Mobile mapping met all the project evaluation criteria

The IngGeovisionteam are highly experienced in holistic surveying. They have been the digitisation partner for buildings, plants and other infrastructure in more than 1,000 successful laser scanning projects. For the Berchtesgadener Land project, they considered various methods: laser scanning via a drone, tachymeter measurement, a static scan and mobile mapping. The evaluation criteria included time spent on site, accuracy of the data, ability to detect the retaining walls and the road condition in high resolution. Finally, whether the method could be used to gather photo documentation and point cloud data in one operation.

A drone was ruled out because it could only deliver photos, tachymeter surveying because it couldn’t deliver photos or point cloud data. A static scan would take too long and couldn’t be positioned on the outside of the walls in many places. Although untested in this scenario, mobile mapping was able to deliver on every criteria. Mobile mapping systems combine sophisticated hardware sensors and software technologies to take laser scanning off the static tripod, letting the team capture accurate 3D data by car.

扫描仪的非常规依恋解决了现场访问问题

IngGeovision使用Leica Pegasus Ultimate II移动映射平台制定扫描解决方案。巧妙的是，为了捕获挡土墙的两面，Leica Pegasus Ultimate II不仅安装在汽车的屋顶上，而且还安装在挖掘机的桶上。这使扫描仪可以悬挂在墙壁的边缘并捕获外部，没有人为安全的风险。控制点的测量是通过转速计TS16进行的，并使用静态RTC 360扫描隧道，以寻找历史排水系统。使用Leica Pegasus Manager，Leica Cyclone和Leica Cyclone 3DR评估了数据。

Delivering fast and flexible scanning

使用移动映射解决方案的一个主要好处是现场的时间很短。Leica Pegasus Ultimate II只花了半天的时间才能乘坐汽车记录3.2公里的道路，并在半天的时间里录制了一整天的时间，以记录到挖掘机上的挡土墙的困难部分。即使在此期间，旅游车辆仍然能够使用这条道路，这意味着检查对当地经济的影响最小。收集了大约162 GB的原始数据，这导致了600 GB的处理数据 - 最终提供了数字地形模型和库存计划，以告知未来的建筑工作。满足TSBA对准确性的要求，数据的绝对准确性可在2-3cm之内。

The evolution of mobile mapping: multiple uses

自2019年以来，TSBA一直是BIM的试点建筑办公室。当局设法将高度的数字化为其管理层的资产提供了高度的数字化，从而使计划，建设和维护更加有效。通过这个项目，在定期建造检查期间，第一次实现了高山路的完全数字化。愿意Ing Geovisionand TSBA to innovate with mobile mapping for this purpose has created a new proven method of reality capture for difficult and high altitude terrain. It’s certain to be used again.

"Mobile Mapping is so advanced nowadays, it can be used also for Monitoring purpose. Within the evaluation of possible data capture solutions the Leica Pegasus:Two Ultimate was the fastest and most accurate solution for the detection of the area.”Sven Gollub，Ing Geovision项目经理。