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

ashraf.afana@3dlasermapping.comsupport@3dlasermapping.com

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