陆上空气

Author: Benjamin Federmann, May 2016

The gravel quarry of Knobel-Bau also includes two artificial lakes which were surveyed with a specially-equipped boat for hydrographic surveys. What was missing, though, was an aerial view of the entire quarry. Focusing on surveying engineering technologies, IngenieurTeam GEO was contracted to determine the remaining volume in Knobel-Bau’s quarries. By creating georeferenced orthophotos and digital terrain models using the unmanned aerial vehicle (UAV) from Leica Geosystems, the firm was able to present the current situation in detail and provide an effective inventory reduction plan. Using the airborne data, the engineers had the possibility to precisely record areas that were difficult to access and include riparian regions and to the calculation.

对于这种残留体积计算，旋钮BAU GMBH砾石坑，尤其是地理参考的正射原模型和数字地形模型，可以很好地可视化测量和计算结果。空气传播数据是通过使用Leica Geosystems UAV解决方案生成的。

“有了这个历史overv详细iew, our customer can coordinate the extraction processes more precisely,” said Martin Schwall, owner and managing director of IngenieurTeam GEO. “This enables the customer to securely plan what to do with the remaining material, based on the most current and accurate information available.”

Combining to overcome unique challenges

Ingenieurteam Geo是Leica Geosystems升级和GNSS仪器的长期使用者，当它成为2014年Leica GeoSystems Portfolio的一部分时，Geo首先对无人机技术产生了兴趣。将测量组件简化为快速有效的项目过程是追求空间空间的关键因素数据采集​​。

“The accuracy of the collected data is important to us, but also the reliability, functionality and quality of all surveying equipment,” said Schwall. “We decided to use this UAV for its trusted reputation in the industry. We then trained one of our employees to become a professional pilot, and we’ve been able to expand our business. Since his training and certification, we not only offer surveying services on land and water but also from the air.”

The aerial survey of the extraction site, including its artificial lakes, and the simultaneous hydrographic survey of the water using the special survey boat posed a specific challenge. Essential to this particular project, both tasks had to be precisely coordinated to provide Kobel-Bau with accurate information.

Flying high, measuring low

为了为最有效的可交付方式创建通用数据集，必须链接各种调查方法，这需要技术解决方案和飞行员的专业知识来生成可靠的数据。为了获得这一点，该公司使用专门开发的飞行计划软件设计了一个精确的飞行计划。使用概述地图，Waypoint飞行计划促进了自主进行空中调查的精确计划。

“The open interface of the workflow provides us with top quality data with virtually no loss,” said Schwall. “We could then easily combine the aerial and hydrography data seamlessly for one valuable deliverable.”

The aerial survey was conducted after determining highly visible and suitable ground points for the georeferencing of the data. With the ability to immediately review the generated data (pictures taken with a high-resolution compact camera) after each flight, the survey quality was quickly validated. The camera, fixed to the free-floating gimbal of the flying multi-sensor platform, enables the pilot and others to review the photographic material as soon as the UAV is on the ground. The images are added automatically during the waypoint flight and tagged with GPS coordinates that are generated by the UAV.

计算表明该项目需要持续六分钟的五个航班才能覆盖55公顷的区域。这种地形的飞行高度在90米处建立。由于调查当天该地区的风条件，飞行员决定共七个单独的航班。作为负责的无人机所有者，Ingenieurteam Geo在最大风速为6 m/s的条件下飞行了无人机，以确保安全。

无故障，所有收集的数据都可以组合成形成高度精确的模型。通过Leica Geosystems总站进行调查的区域以及测量船的声纳结果，与无人亚博5分钟快三机的正交照片无缝合并。

Combined with the results from the hydrography survey, IngenieurTeam GEO was able to provide a complete overview of the site and the current situation, which Knobel-Bau used to further its business.

“The combination of survey data from the air, from the ground and from the surveying boat has led to an excellent result. The orthophoto, the exact volume calculation and the 3D model of the gravel pit permit prospective planning and accurate assessment of the actual situation,” said Michael Knobel, managing director of Knobel-Bau. “The economic implementation of large-scale projects and the associated results of IngenieurTeam GEO is a decisive advantage in comparison to all conventional and traditional methods.”

潜力越来越大

After more than 45 aerial projects and about 350 individual flights, IngenieurTeam GEO continues to be impressed by the data accuracy of Leica Geosystems UAV while seeing nothing but positive ROI on its investment.

Schwall说：“使用Leica Geosystems无人机进行航空数据生成，使我们已经能够将户外流程时间从整天甚至几分钟减少。”“我们认为不同的Leica Geosystems技术与软件和调查工具之间的相互作用是与经典测量方法和市售照片无人机的关键差异。这个组合使我们可以轻松地生成数据并为客户提供基本信息。”