真正的交易付出了

Author: Katherine Lehmuller, May 2016

三维激光扫描仪是大投资s, and WestLAND Group, Inc., founded in 2000 in Rancho Cucamonga, California, US spent years looking for the right instrument. The company had a definite need; the work they do for railroads, which often calls for clearance surveys around tunnels and bridges, ideally fits into point clouds and cloud-based models.

A month after WestLAND received the Leica Nova MS50 MultiStation, one of their customers J.L. Patterson & Associates (JLP), a rail-specialised engineering company, came to WestLAND and requested ground control for a mobile LiDAR survey. Sophisticated users of 3D geospatial data, JLP wanted WestLAND to set control along and within several railroad tunnels near the Mexican border, with someone else doing the LIDAR work. JLP was used to working with point clouds, but didn’t necessarily think of WestLAND when it came to 3D laser scanning. WestLAND suggested they not only provide control, but also scan one tunnel, and see if the deliverable worked and was cost-effective for JLP. The offer was accepted, and WestLAND got to work.

The deliverable was ultimately for Pacific Imperial Railroad (PIR) on a section of rail known as “The Impossible Railroad.” PIR is rehabilitating the Impossible Railroad for use with double stacked trains, and 17 tunnels will have to be surveyed for clearance analysis and possible grading and track redesign. WestLAND saw the scan of one tunnel as basically a marketing investment and offered to scan one of the smaller tunnels, No. 15, which was only 91.4 metres long. It was the first project to make use of the MultiStation and it went very well.

在使用多个控制调查的多阶段穿越隧道时，设备被切换到扫描模式，并在设置几个设置后，立即开始扫描。整个隧道只花了几个小时进行扫描，还为工程师提供了时间清理笔记和素描，并为网站拍照以补充多站的图像。

Explore next chapter:From field to office

Story: The "real deal" pays out
Chapter 1: Introduction
Chapter 2:From field to office