History of development ¶

• August 2024: new release versions 3.6.0, 3.6.1, 3.6.2
• January 2024: new release
• August 2023: Integration of Vogelsprespektive Seilaplan version 3.5
• June 2023: Seilaplan version 3.4.2
• December 2022: Seilaplan version 3.4.1
• May 2022: Field measurements in cooperation with BOKU Vienna and Abächerli Forstunternehmen AG(to the video)
• May 2022: Seilaplan version 3.4.0

• January 2022: Version 3.3.0

• 2020: Field measurement in cooperation with Nüesch & Ammann Forstunternehmung AG and Abächerli Forstunternehmen AG
• 2019 - 2020: Further development of Seilaplan version 2 as part of the project "New foundations for efficient rope line planning" (WSL)
• 2013 - 2015: QGIS plugin Seilaplan prototype (ETH LUE)
• 2008 - 2012: Algorithms as part of the doctoral thesis of Leo Bont (ETH LUE)

The calculation of sagging and load-bearing cable tensile forces in forestry cable crane systems based on the so-called chain line provides accurate results, as tests in practice have shown. It was also investigated how modern remote sensing methods could support the planning process when creating the rope lines and automatically calculating the rope line layout (length profile). There is still a need for further research in this area.

In cooperation with two Swiss forestry companies, measurements of the sag in the middle of the rope field and the rope tensile force at the anchor were carried out with four different loads in May/June and November/December 2020. The measurements were carried out on four rope lines, each with two to three spans.