DOCUMENTATION OF CRIME SCENES AT BRESCIA UNIVERSITY (Italy)

Multiresolution and muti-sensors integration for Forensic studies and documentation.

KEYWORDS: Forensic | University | DPI-8X | HERON AC-1 | FARO Focus3D

This was the topic of the annual "student project" asked the students attending the International English speaking course of Advanced Geomatics at the University of Brescia (Italy). Students were asked to create a virtual crime scene and proceed to the 3D documentation of the virtual site. Everything was carried out in full autonomy and only with the external supervision of the course teachers (prof. Vassena and assistant Chiamone). Several technologies, most of them provided by Gexcel, have been applied. The full crime scene has been acquired by iMM HERON, the local (room) site Faro Focus3D and the virtual body scanned by Dot Product DPI-8X handheld scanner.

Download NOW the full project and enjoy! 
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We thank all the students of the course for their creativity, their interest in the field work and the quality of the realized project. Well done!

ABOUT

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ADVANCED GEOMATICS  | unibs-advanced-geomatics

Advanced Geomatics is a University of Brescia Master's Degree course on Civil and Environmental Engineering. The Advanced Geomatics course introduces Master's students to 3D surveying, mapping and documentation technologies. The students, thanks to intense lab activities, can use and apply 3d surveying technologies and instruments. In particular, students learn how to use and how to carry on the data elaboration of static laser scanners, handheld scanners, Indoor and outdoor mapping solutions. Students learn also how to carry on rigorous surveying applications using digital photogrammetry.

HERON SUCCESS CASE — UNDERGROUND MINING

3D SCANNING OF AN OLD MINE Zhejiang Province (China)

PROJECT DESCRIPTION

KEYWORDS: Mining | Underground | HERON | 3D Mapping

The surveying of an underground mine is difficult for two orders of problems: the complicated and dark tunnels environment and the underground depth where GPS or GNSS signal can't be reached.
The Aurantech company has faced this problem in an old underground mine site, in Zhejiang and thanks to the HERON wearable mobile mapping system the procedure for data collection was not only possible but also efficient.
After pre-processed the surveying acquisitions and filtered the noise, it has been possible to build the surface model of the tunnel, based on the required parameters, with a global accuracy of 10 cm.
The data extraction has been made with JRC 3D Reconstructor software. First of all, the data have been aligned via the automatic registration and bundle adjustment software's functions. Then, the cross-sections have been easily generated and volume and surface areas computed on the 3D model. Finally, the 3D model was easily exported to third-party applications using one of the most common data interchange formats.

Fig 1. The operator with HERON AC-1 during the surveying activities in the underground mine
Fig 2. HERON point cloud model of the underground mine with the path

Fig 3. HERON 3D mesh model

« What we had to do was just to set up some control points using a total station and then simply walk with HERON. Software and hardware made the work easier and supplied us with a complete solution. HERON is a reliable, simple and high-performance 3D solution »

Sherry Wang
AURANTECH | Commercial Manager

NEEDS AND GOALS

• Generate a precise map of an old tunnel where tripod laser scanners or GPS cannot be used.
• Build a measurable 3D model of the underground mine starting from the 3D point cloud.

RESULTS

• 3D point cloud model
• Depth calculation
• Area calculation
• Cross-sections
• Volume calculation

Fig 4. CAD environment: cross-sections of the HERON point cloud model

HERON AC-1 MAIN BENEFITS

• Work without GPS or GNSS sensors
• The precision of final results
• Management of wide and different data

TECHNICAL DETAILS

• SURVEYING SYSTEM: HERON AC-1 and total station
• SURVEYING AREA: 250,000 sqm abandoned mine
• SURVEYING TIME: 6 hours
• PROCESSING SOFTWARE: HERON Desktop and JRC 3D Reconstructor
• PROCESSING TIME: 18 hours

ABOUT

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Aurantech | www.aurantech.com

Aurantech is a high-tech company situated in Shangai (China) featured to provide complete 3D solutions; highly experienced in 3D project services from 3D data collection, 3D data processing to the 3D information management system for final customers.