Measuring the point cloud… with a GNSS rover
JTRS注册测量师在Leica GS18 I GNSS RTK ROVER上的收件人
作者：Renata Barradas
我们测量点云。
This is the slogan from JTRS Registered Surveyor, a professional land surveying company in Singapore that provides 3D laser scanning, land survey, aerial mapping and inspection, photogrammetry and imaging services. JTRS is continuously looking for innovative and creative ways to improve the surveying services the company provides.
该公司的最新技术飞跃是能够通过全新的技术收购来衡量地理参与点云和点。Leica GS18 I GNSS RTK Rover。
“从单个乐器中实时定位同时捕获图像的能力确实改变了我们进行测量的方式 - 这是一个现实捕获概念，”亚博ag真人规律explains Jimmy Tan, owner at JTRS.
Also, with the tilt compensation that comes with it, it helps in getting RTK observations and recording quickly, which is useful when working at night like we have to do at airport runways or MRT viaducts. I don't need an extra pair of hands to hold the torchlight to shine at the bubble while I level the pole."
Beyond measuring the point cloud, the GS18 I has empowered JTRS with a powerful RTK rover that combines fast RTK initialisation, tilt-compensated measurements and Visual Positioning, all in one tool. With GS18 I added to their portfolio, JTRS has been able to provide new services and improve the company's current services.
Bullet-proof workflow
JTRS主要使用GS18 I进行公用事业和建筑项目中的控制调查和质量检查。紧密的精度需要从50mm到100mm，对于大多数QC项目，需要40mm。对于每个项目，此通用RTK GNSS Rover的工作流程是：
- Capturing the data using either the pole tip or Visual Positioning with the GS18 I andLeica Captivate领域的年代oftware
- Data processing with office softwareLeica Infinity
- 使用以下方式创建可交付成果（要处理图像到点云），Leica JetStream(to publish the point clouds) and3D RESHABER(to do mesh modelling based on point clouds).
用棕褐色的话"With the GS18 I, I just need to point the camera onto the subject that I want to capture while walking. For example, in one of my projects, the time taken to survey the trial pit with the GS18 I was no more than five minutes. The time taken to post-process in the office using Infinity software was 30 minutes. I can produce true colourised point clouds, which I can export to orthophotos and also create digital surface models. It is also possible to create hundreds of topo points from the georeferenced images quickly and efficiently."
Safety and speed in a trial pit and as-built trench survey
Carrying out trial pit or as-built trench surveys can be very challenging. Surveyors usually need to follow the site contractors' workflow and schedule as the trench needs to be backfilled, and the road lane needs to be re-opened as quickly as possible.
当JTRS的任务是公用事力沟渠文件时，他们将其视为将其新的GNSS Rover进行真实测试的机会。除了对试验坑和地下公用事业进行齐全的调查外，GS18我还允许它们创建3D点云并将其顺序为3D网格模型。
同时使用极头尖端和视觉定位来测量现场并使用简单的工作流进行处理的自由，将JTR的测量界推向了另一个级别。
Confidence and accuracy in quality control check surveys
For a building and scanning project that included the 3D scanning of 1,200 blocks, JTRS carried the quality check of the georeferenced scanned data with the GS18 I. Once again, the tilt and Visual Positioning technologies on the sensor made it possible to access previously unreachable points."In one of our projects with HDB (Housing Development Board), I was able to pick up coordinates of points captured during my walk using Visual Positioning. With the GS18 I, it is convenient and fast to survey and I can get instant results before leaving the site.
当它无法使用杆尖时，因为它离建筑物的边缘太近，并且RTK信号无法初始化，我们使用了视觉定位方法，并远离有RTK信号的建筑物走得更远。在大多数情况下，如果网站条件使我们能够这样做，我们将使用这两种方法，”描述棕褐色。
柔滑的工作流 +更高质量可交付成果=自信客户
JTRS现在能够更安全地工作并节省人力成本，因为GNSS天线仅由一个人操作。为了准备在现场使用GS18 I，团队不需要培训，只需简要介绍如何处理无限段中的图像。
"Clients are more confident in the quality of the deliverables. With Infinity, I am able to process the images into true point clouds with accurate georeferencing. With Visual Positioning, I can capture two images per second as I walk, and each image comes with global coordinates from a single source – the GS18 I. It is like flying the drone installed with a GNSS antenna and camera, except we are walking,"sustains Tan.
"Clients are more confident in the quality of the deliverables. With Infinity, I am able to process the images into true point clouds with accurate georeferencing. With Visual Positioning, I can capture two images per second as I walk, and each image comes with global coordinates from a single source – the GS18 I. It is like flying the drone installed with a GNSS antenna and camera, except we are walking,"sustains Tan.
通过衡量点云来打开新的机会
JTRS specialises in reality capture through 3D laser scanning and photogrammetry. The GS18 I adds to the company's motto of "measuring the point cloud" with an antenna that allows surveyors to capture sites freely and safely, carry QC for almost all its data and create multiple deliverables.
"We can further develop point clouds into a 3D mesh model – that's reality capture and it is very helpful in visualisation – many times better than a single point, single line or a 2D drawing. With Infinity you can also create Digital Surface Models. This is good for engineers or designers who can use this TIN model in their design work and easily extract heights and contours, water flows and more."says Tan.
The GS18 I is not only helping to improve the current services JTRS provides but helping the company to provide new services. Being able to create multiple deliverables faster and with fewer resources has led to more project opportunities.
"We can further develop point clouds into a 3D mesh model – that's reality capture and it is very helpful in visualisation – many times better than a single point, single line or a 2D drawing. With Infinity you can also create Digital Surface Models. This is good for engineers or designers who can use this TIN model in their design work and easily extract heights and contours, water flows and more."says Tan.
The GS18 I is not only helping to improve the current services JTRS provides but helping the company to provide new services. Being able to create multiple deliverables faster and with fewer resources has led to more project opportunities.
If you want to hear and see more,listen to our webinar与吉米·谭（Jimmy Tan）。
Leica GS18 I
Veelzijdige gnss rtk漫游者van landmeetkundige kwaliteit遇见了Visuele plaatsbepaling
Environmental, social and governance impact: Worker safety
Worker safety can be a major concern for specific surveying tasks. Working in or near trenches, for example, can be hazardous: Risks include falling into the trench, exposure to toxic fumes, contact with buried service lines, being hit by machinery and more. Any technology that requires fewer people and less time on site helps keep workers safe. The GS18 I was designed for surveyors who want to capture an environment quickly. They can decide later which points to measure and do so in the office, thus saving expensive and possibly risky on-site time.
Worker safety can be a major concern for specific surveying tasks. Working in or near trenches, for example, can be hazardous: Risks include falling into the trench,...