Services: High Definition Surveys

High Definition Surveying, or HDS, 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 Surveys has invested extensively in training staff with Leica Geosystems and Spatial Technologies. We have developed in-house methods and procedures for using HDS in the field.

HDS 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. Using HDS

As in all surveying, it is important to use the most appropriate methods and equipment to successfully complete a project. HDS 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 HDS

    - Safety
    HDS 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.

    - Detail
    HDS 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.

    - Accessibility
    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.

    - Convenience
    With the need for physical contact, HDS 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.

    - Speed
    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.

    - Accuracy
    With HDS, accuracies are achievable to 6mm at 50m. Tronnes Surveys 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.



     High Definition Surveys

     HDS Brochure
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