Speeding up with mobile mapping

作者：工作人员

Area 3 is Highways England’s second largest network carrying around 10 per cent of the country’s overall traffic flows. It includes the M27, M3, M4, A3, A303 and the Hindhead Tunnel and provides the main link routes between several major towns and cities including Oxford, London, Reading and Swindon in the north, and Bournemouth, Southampton and Portsmouth in the south.

The large area recently underwent an upgrade to design, replace and install road signage for clearer visibility across the gradients on the road. A topographical survey was needed to capture features for the design. The large scale project required detailed topographical surveys of the carriageway and verges, each survey measuring长600米capturing:

• Carriageway extents
• Road markings
• Crash barriers
• 频道
• 路缘和遏制堰
• Gullies
• 已经rge levels
• Ironwork frames
• Sign locations
• 交通循环
• Overhead cables
• 电盒
• Railings
• Fences
• Steps
• 桥拱形水平
• Pier positions

Sun Hill Surveying and Engineering Ltd.是一家专业的土地测量和工程公司，由基尔（Kier）委托代表英格兰高速公路3号地区进行调查119个地点。

From months to day

With more than 30 years’ experience focusing on the civil engineering sector throughout the United Kingdom, Sun Hill brought a modern approach to surveying the large project with itsLeica Pegasus：两个mobile mapping platform.

To survey these sites traditionally is a long and protracted operation using laser scanners, total stations and GPS, to collect thousands of points of data per day. Typically, this would take a surveyor around two days per site to complete in the field. Also, to survey this many sites would have required 119 individual traffic management installations.
有了这个规模的项目，与所有相关人员相关的健康和安全风险都有很大的健康和安全风险，在白天和黑夜的所有时间内都在车道和边缘。Pegasus中发现了一种更安全，更具成本效益的方法：两个可以按时和预算交付该项目。

With mobile mapping, access to all sites was left clear with no road closures as the Pegasus:Two acts in the same way as any other public vehicle when collecting the 3D geospatial data. In total, the surveyors travelledmore than 6,000 km使用移动映射平台每秒收集数百万点。有no disruption to the network由于不需要流量管理，因此流量流如正常一样继续。

Safety to survey personnel was also considerably improved using mobile mapping as no surveyors or traffic management crews were needed in the road as all data was captured from the safety of the vehicle. The surveyors were able to create traditional topographical surveys from point clouds.

"Mobile mapping provided a rapid data capture solution for us,"said Peter Bouchard, Sun Hill mobile mapping specialist."With the Pegasus:Two, we saved time, reduced safety risk and maximised value by reducing a six-plus-month project to 12 days."

移动映射投资回报

由于使用Pegasus：两个，所有119个地点均已在只有12天，没有交通管理，可以从办公室环境的安全中进行处理和提取。此外，对所有119个地点进行了调查并将其交付给Kier最后截止日期前一周.

Sun Hill能够交付这个项目with less than 20 mm absolute accuracy. The surveys were then delivered in a staggered program, allowing sites to be prioritised and enabling some sites to be delivered earlier than others.

"At Kier we aim to be at the forefront of technology,"said Chris Fuller, Kier Roads Value Stream manager."The Pegasus:Two is one of the most accurate mobile mapping units on the market. It has helped deliver significant cost savings as well as meaning we could eliminate traffic management completely from the project and all 119 surveys were delivered before the final deadline."