JRC 3D RECONSTRUCTOR SUCCESS CASE — CULTURAL HERITAGE SURVEY

ARCHITECTURAL SURVEYING OF A HISTORICAL BUILDING Dr. Sun Yat-Sen’s Memorial Hall, Guanzhou (CHN)

PDF versione italiana

PROJECT DESCRIPTION

KEYWORDS: Cultural heritage | JRC 3D Reconstructor | 3D Laser Scanner | Chinese architecture

Dr. Sun Yat-Sen’s Memorial Hall Building

NEEDS AND GOALS

• Recording details and conditions of structure and decoration
• Creation of fine 3D file of the historical building
• Creation of fine 3D dataset including point clouds, CAD, photos, etc.
• Providing 3D point cloud models for displaying and disseminate
• Providing the online 3D model for promotion

The Dr Sun Yat-Sen’sMemorial Hall is located in Guangzhou, China. It was built in 1929 in honour of Mr Sun Yat-Sen(the forerunner of the great democratic revolution in China) and designed by the famous architect Lu Yanzhi (1894-1929). The building has an octagonal structure and it is a combination of the Chinese traditional palace style and the Western modern space and structure design method. The two goals of the project were: 

1. To conduct a comprehensive digital survey and acquisition of the 3D information of the historical building. 
2. To create a fine 3D file with all the information on the preservation status of structure, decoration and equipment. This huge building was used for many years and is full of precarious equipment, structures, and decorative components, which caused lots of difficulties both for laser scanning activities and point cloud postprocessing.

Dr Sun Yat-Sen’s Memorial Hall Point cloud model

« Thanks to JRC 3D Reconstructor we obtained the registration of more than 500 scans quickly and accurately. »

Prof. Yangting
SCUT | South China University of Technology

Building section with reflectance

The Gexcel software allowed to extract from the point cloud the building’s plans, elevations and sections, necessary to generate the CAD drawings on a 1:100 scale. With a highly collaborative group and AutoCAD integration, a final 3D database of Dr Sun Yat-Sen’s Memorial Hall was established for follow-up research, displaying and promotional activities. The work was successfully completed in 2 weeks.

JRC 3D RECONSTRUCTOR MAIN BENEFITS

• Generation of 3D point cloud models in a short time
• Fast automatic registration of point cloud
• Easy and quick key points generation: accurate sections of structure and details (structure, high-value elements, etc.)

TECHNICAL DETAILS 

• SURVEYING SYSTEM: FARO X130 & FARO X330 with RICOH THETA
• SURVEYING AREA: 8.700 sqm
• PROCESSING SOFTWARE: JRC 3D Reconstructor Heritage-Architectural | AutoCAD
• SURVEYING TIME: 3 days
• PROCESSING TIME*: 15 days

RESULTS 

• Full coloured point cloud of the whole building (inside and outside, view on multiplatform)
• AutoCAD drawings for plans, elevations, sections in a 1:100 and 1:50 scale
• Point cloud slice showing structural deformations and damage status

Building technical table, 2D CAD plan view

ABOUT

---

Guangzhou SIKAN Surveying &MappingTechnology Co., Ltd. | SCUT  en.scut.edu.cn/

Technical consultant company dedicated to providing survey and supporting services for the reconstruction of historic buildings, renovation of old cities, and renovation of cultural relics with the aim to provide effective and reliable 3D data and archives for today's urban construction.

HERON SUCCESS CASE — ENERGY REQUALIFICATION

FROM LASER SCANNER SURVEY TO 3D BIM MODEL Chigi Palace, Rome (IT)

PDF versione italiana

PROJECT DESCRIPTION

KEYWORDS: Engineering | Heritage | BIM | Heron | 3D Mapping 

The Chigi Palace is a historic building, in the heart of Rome, currently the seat of the Government of the Italian Republic. The entire building was taken over for the purpose of constructing a 3D BIM model aimed at energy redevelopment, therefore without the need for millimetric accuracy.

« The survey with HERON was very useful for the creation of the BIM model. Simply walking through the rooms of the historic building, we quickly got an enormous amount of data, subsequently used by the customer for CAD modeling.»

Giorgio Dotti
Gexcel | Surveyor

NEEDS AND GOALS

• 3D survey of the historic building for energy efficiency
  
• Speed and confidentiality during the course of the survey
  
• Creation of a BIM model

The quick execution of the survey campaign was made possible thanks to the integration of several relevant methodologies, in particular, thanks to the real-time mobile acquisition made with HERON.

Fig.2_HERON during the Chigi courtyard survey | Fig 3. HERON point cloud 3D model integration

HERON AC-1 MAIN BENEFITS

• Efficiency: saving time and money 
• Effectiveness of the functions
• Accuracy of the final results
• Management of different data types (mobile and static scanners)

Fig.4_Zoller+Fröhlich laser Scanner 51010C "Sala dei mappamondi" static scan acquisition

The survey phase with HERON took place in the internal and external regions of the building, for a duration of 3 days and a total of about 25.000 m², divided into 94 dynamic acquisitions with a resolution of about 2 cm. At the same time, 54 detailed scans (with an average resolution of 4 mm) were captured with Z+F static laser scanner, then georeferenced by classical topography.

Fig.5_HERON point cloud inserted into Chigi Palace BIM model

Starting from the point clouds, we worked with special modelling software to obtain the 3D reconstruction of the building.

RESULTS

• Georeferenced point cloud 
• 3D Model
• BIM modelling of the entire building

TECHNICAL DETAILS

• SURVEYING SYSTEM: HERON AC-1 - Zoller+Fröhlich 5010C
• SURVEYED AREA: 2.500 sqm
• SURVEYING TIME: 3 days, 25.000 m²
  
• PROCESSING SOFTWARE: HERON Desktop - JRC 3D Reconstructor - ArchiCAD
• DATA PROCESSING TIME: 1 month for the final result

ABOUT

---

CSG Palladio | www.csgpalladio.org

Polytechnic laboratory for companies and professionals requiring clear answers in the field of materials technology, structures, civil construction, industrial research and cultural heritage. The Client requested to Gexcel the rental with the operator of the HERON equipment for the data acquisition activities. The data processing and the final delivery were performed by the Client.

HERON SUCCESS CASE — HOSPITAL REDEVELOPMENT

AS BUILT VERIFICATION TO PLAN NEW STRUCTURAL CHANGES Hospital in North of Italy

PDF versione italiana

PROJECT DESCRIPTION

KEYWORDS: Engineering | Architecture | Hospital redevelopment | Heron | 3D Mapping 

The healthcare sector is always in constant evolution. In order to stay at the forefront from the point of view of diagnosis, there is often the need to introduce more advanced machinery whose placement within the hospital space must be adequately planned. In many cases it is necessary to completely rethink the rooms, taking care not to hinder the hospital routine or to cause inconvenience to the patients.
In this specific case, the client decided to proceed with a rapid survey carried out using the HERON instrument, thanks to which it was possible to detect 3 wings in just 20 minutes, simply by walking along corridors, rooms, and stairs. During data processing, it was possible to extract the point cloud 3D model and compare it with existing 2D maps. The plans of the detected environments were then updated: orthophotos of the 3D model were generated and subsequently imported and vectored in CAD.

Fig.1_HERON outdoor and indoor mapping

« The use of HERON AC-1 for the detection of some hospital internal environments has allowed obtaining a 3D model in a very short time, without interfering with the hospital's operational routine »

Massimo Dierna
Gexcel | Civil engineer

NEEDS AND GOALS

• To obtain the real state of the building in order to plan the implementation of new technical rooms.
  
• To acquire 2D and 3D data quickly and discreetly without disturbing the guests of the structure.
  
• To not interrupt or hinder the regular functioning of the hospital.

Fig.2_HERON survey with its trajectory. |  Fig.3_Hospital x-ray orthophoto 

HERON AC-1 MAIN BENEFITS

• Efficiency: time and economic saving.
• Integration: management of very large dataset, with the possibility of automatically integrating data from terrestrial or handheld laser scanners. 
• Quick and frequent update of 2D and 3D maps, thanks to Heron’s automatic localization capability. Survey easily managed by operators with minimal knowledge of surveying.

Fig.4_HERON survey section (in purple) comparing with the existing CAD floor plan

RESULTS

• 3D point cloud model
• CAD maps in 1:200 scale
• Windows position into the CAD map

TECHNICAL DETAILS

• SURVEYING SYSTEM: HERON AC-1
• SURVEYING AREA: 2.500 sqm
• SURVEYING TIME: 20 minutes
• PROCESSING SOFTWARE: HERON Desktop - JRC 3D Reconstructor
• DATA PROCESSING TIME: HERON Data 1 day - CAD Plans 3 days

ABOUT

---

The Client required to Gexcel the rent of HERON with the operator for the surveying activities and the data processing delivery. For a privacy agreement, Gexcel is not allowed to show the Client’s name.