用GNSS漫游者测量点云
JTRS注册测量师在Leica GS18 I GNSS RTK ROVER上的要点
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其全新的技术收购来衡量地理参考点云 -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，”bob综合app赌博JTRS的所有者Jimmy Tan解释说。
此外，借助随之而来的倾斜补偿，它有助于获得RTK观察并迅速进行记录，这在夜间工作时像我们必须在机场跑道或MRT高架桥一样有用。当我平整杆子时，我不需要额外的双手来握住火炬光来照亮气泡。”
除了测量点云外，GS18我还用功能强大的RTK漫游器授权JTR，结合了快速的RTK初始化，倾斜补偿的测量和视觉定位，这都是一个工具。使用GS18，我添加了他们的投资组合，JTRS能够提供新服务并改善公司的当前服务。
防弹工作流程
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现场软件
- 使用办公软件的数据处理Leica Infinity
- 使用以下方式创建可交付成果（处理图像到点云），Leica JetStream（发布点云）和3D RESHABER(to do mesh modelling based on point clouds).
用谭的话说，"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."
试验坑中的安全性和速度
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档时，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程进行处理的自由，将JTR的测量范围推向了另一个级别。
质量控制检查调查的信心和准确性
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.“在我们的一个项目与HDB(住房、健康ent 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 +更高质量的可交付成果=自信的客户
由于GNSS天线仅由一个人操作，JTRS现在可以更安全地工作并节省人力成本。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."谭说。
GS18我不仅在帮助改善JTRS提供的当前服务，还可以帮助公司提供新服务。能够更快地创建多个可交付成果，并且资源较少，从而带来了更多的项目机会。
"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."谭说。
GS18我不仅在帮助改善JTRS提供的当前服务，还可以帮助公司提供新服务。能够更快地创建多个可交付成果，并且资源较少，从而带来了更多的项目机会。
If you want to hear and see more,听我们的网络研讨会与吉米·谭（Jimmy Tan）。
Leica GS18 I
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