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.
"The capability of capturing images at the same time with real-time positioning from a single instrument, really changes the way we carry out surveying – It's a reality capture concept,"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 mostly uses the GS18 I for control surveys and quality checks in utility and construction projects. The tight accuracies needed range from 50mm to 100mm and for most QC projects within 40mm. For each project, the workflow with this versatile RTK GNSS rover is:
- Capturing the data using either the pole tip or Visual Positioning with the GS18 I andLeica Captivate现场软件
- Data processing with office softwareLeica Infinity
- Creating deliverables with: Infinity (to process images to point clouds),Leica Jetstream(to publish the point clouds) and3D RESHABER(to do mesh modelling based on point clouds).
In Tan's words,“使用GS18 i，我只需要将相机指向我在步行时要捕获的主题。分钟时间。使用Infinity软件在办公室进行后处理所花费的时间为30分钟。我可以产生真正的颜色点云，我可以导出到正源于正驱动器并创建数字表面模型。还可以创建数百个TOPO点快速有效地从地理参与图像中。”
Safety and speed in a trial pit and as-built trench survey
进行试验坑或井井有条的调查可能非常具有挑战性。测量师通常需要遵循现场承包商的工作流程和时间表，因为需要回填沟槽，并且需要尽快重新开放道路车道。
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。
Smoother workflow + higher quality deliverables = confident clients
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。
“客户对可交付成果的质量更有信心。通过无穷大，我能够以准确的地理作用将图像处理为真实点云。通过视觉定位，我可以在行走时每秒捕获两张图像，并且每个图像都随附来自单个来源的全球坐标 - GS18 I.就像在我们走路一样飞行带有GNSS天线和相机的无人机，”维持棕褐色。
“客户对可交付成果的质量更有信心。通过无穷大，我能够以准确的地理作用将图像处理为真实点云。通过视觉定位，我可以在行走时每秒捕获两张图像，并且每个图像都随附来自单个来源的全球坐标 - GS18 I.就像在我们走路一样飞行带有GNSS天线和相机的无人机，”维持棕褐色。
Opening new opportunities by measuring the point cloud
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.
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Leica GS18 I
Versatile, survey-grade GNSS RTK rover with Visual Positioning. Capture the site in images and measure points from them, either in the field or later in the office.
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,...