sitemonitor4d: rockfall analysis
TRANSCRIPT
Dr Ashraf Afana LiDAR Engineer - 3D Laser Mapping
Rockfall Analysisin
SiteMonitor4D
What is SiteMonitor 4D? Measures 3D deformation
Identifies changes over time
The software is formed by two main modules: acquisition and analysis
RIEGL Laser Scanner
Type of data:
• CSV Points• AutoCAD DXF• DXF Triangules• Vulcan Triangles • Surpac STR• Surpac DTM• ODBC Connection• LAS file
Workflow: Rockfall & change detection
Data capture
Point cloud 1
Data processing
Time interval
Point cloud 2
Raster image 1
Time interval
Raster image 2
Deformation vs Rockfall
Sub
trac
t
Change detection map
Scale
Rockfall
Deformation
Rockfall Analysis:
Parameters to identify
1. Minimum volume (m3): the minimum volume acceptable to consider a rockfall event.
2. Minimum volume at Start (m3): the minimum volume needed to initiate a seed for a rockfall event.
3. Minimum nodes (N): the minimum number of nodes to consider in the generation of minimum volume to start.
4. Minimum persistence (hours): the difference in time for the rockfall event to be analysed
Rockfall analysis: working example in SiteMonitor
Rockfall analysis in SiteMonitor 4Dwww.3dlasermapping.com
[email protected]@3dlasermapping.com
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