Laser Scanning is a combination of Terrestrial based laser scanning, computer technology and high precision control networks. Instead of surveying one point at a time on a single line, we can collect thousands of points per second with a very high degree of accuracy. Tronnes Geomatics has invested extensively in training staff with Leica Geosystems and Spatial Technologies. We have developed in-house methods and procedures for using Laser Scanning in the field.
Laser Scanning
Laser Scanning
Laser Scanning can be very useful in surveying Oil & Gas related projects such as gas plants, compressor stations, well sites (including well heads and gathering systems), and water handling facilities.
As in all surveying, it is important to use the most appropriate methods and equipment to successfully complete a project. Laser Scanning is suitable for certain types of sites, structures and projects, such as the following:
- Structures that have a geometrical complexity.
- Sites that are relatively clear of vegetation
- Sites or structures with a great amount of detail or congestion.
- Surfaces that are difficult to reach.
- Sites that require active and continuous use.
- Sites that are not in close proximity to the client or surveyor.
- Sites that are unsafe to occupy.
Benefits of Laser Scanning
Laser Scanning allows field personnel to maintain safe distances from sites and structures that may otherwise put them in harm’s way. This is also true for workers that do not have to negotiate around survey crews.
Laser Scanning provides a means of storing a “physical reality” on the desktop. This allows engineers and/or designers to have easy access to critical data and provide specific site information to guide decisions and optimize the value of any given plant or facility in the following areas:
- Field Data Analysis
- Critical Component Analysis
- Identification of potential components that could result in performance loss
- Main equipment conversion, modification, and upgrades
- Process redesign and engineering
- Maintenance plan analysis
The Leica HDS 3000 also has a bore-sighted digital camera for calibrated photo overlays. This serves to view the site for additional detail and also provide photo rendering of the point cloud data. Accuracies are achievable to 6mm at 50m.
Both horizontally and vertically, we measure between multiple points or features without ever having to make physically contact. Sometimes it is difficult, or even impossible, to reach features such as ducting or piping. Height and location restrictions or the inability to halt plant operations often do not allow for safe access to these features. As long as the feature is not fully enclosed, we can most often obtain measurements from a safe and convenient location on the ground. We can even establish pipe size if half of the diameter of the pipe is exposed. The image to the right shows actual point cloud data that has been photo rendered for easier recognition of features. It can be fully dimensioned and imported to AutoCAD.
With the need for physical contact, Laser Scanning can be used for Oil & Gas related surveys to capture 3D data about gathering and boosting, gas pipeline, storage, metering and reduction, gas treatment and processing auxiliary systems, oil and gas power generation and geothermal and steam generation. The alternative would be a series of plant operation closures over the period of time.
To the field, in the field and through to delivery, scanning data offers high efficiency in field data collection and can produce a reduced delivery time to the Engineer or end user.
With Laser Scanning, accuracies are achievable to 6mm at 50m. Tronnes Geomatics can integrate scan data with local and provincial control systems to provide highly accurate projected data sets. We achieve precise control using Leica 1230 GPS systems, the latest in real time GPS equipment. Vertical ties are checked through differential leveling.