scholarly journals 3D VISUALIZATION OF CULTURAL HERITAGE USING TERRESTRIAL LASER SCANNER (A Case Study : Monument of Heroes, Surabaya, East Java)

Geoid ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 184
Author(s):  
Cherie Bhekti Pribadi ◽  
Hepi Hapsari Handayani ◽  
Firdiansyah Eka Rachmawan
Keyword(s):  
Cultural Heritage ◽  
3D Visualization ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner

scholarly journals SYMBIOSIS OF UAS PHOTOGRAMMETRY AND TLS FOR SURVEYING AND 3D MODELING OF CULTURAL HERITAGE MONUMENTS - A CASE STUDY ABOUT THE CATHEDRAL OF ST. NICHOLAS IN THE CITY OF GREIFSWALD

2015 ◽  
Vol XL-1/W4 ◽  
pp. 91-96 ◽  
Author(s):  
G. J. Grenzdörffer ◽  
M, Naumann ◽  
F. Niemeyer ◽  
A. Frank
Keyword(s):  
Cultural Heritage ◽  
3D Modeling ◽  
Laser Scanner ◽  
Measurement Methods ◽  
Terrestrial Laser Scanner ◽  
High Quality ◽  
Standard Deviations ◽  
The City

In this contribution the possibility to combine terrestrial laser scanner (TLS) measurements and UAS photogrammetry for the detailed description and high quality surveying of a cultural monument will be illustrated by the example of the Cathedral of St. Nicholas in the city of Greifswald. Due to the different nature of UAS photogrammetry and TLS walls and windows as well as portions of roofs are captured with a different level of completeness and accuracy. The average deviations of the test areas on the overlap between the two measurement methods ranges from 0.015 m to 0.033 m with standard deviations of 0.025 m to 0.088 m.

scholarly journals On the Sensitivity of the Parameters of the Intensity-Based Stochastic Model for Terrestrial Laser Scanner. Case Study: B-Spline Approximation

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2964 ◽  
Author(s):  
Gaël Kermarrec ◽  
Hamza Alkhatib ◽  
Ingo Neumann
Keyword(s):  
Stochastic Model ◽  
Good Description ◽  
Spline Approximation ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
Case Scenario ◽  
Constant Variance ◽  
Power Law Function ◽  
Stochastic Properties

For a trustworthy least-squares (LS) solution, a good description of the stochastic properties of the measurements is indispensable. For a terrestrial laser scanner (TLS), the range variance can be described by a power law function with respect to the intensity of the reflected signal. The power and scaling factors depend on the laser scanner under consideration, and could be accurately determined by means of calibrations in 1d mode or residual analysis of LS adjustment. However, such procedures complicate significantly the use of empirical intensity models (IM). The extent to which a point-wise weighting is suitable when the derived variance covariance matrix (VCM) is further used in a LS adjustment remains moreover questionable. Thanks to closed loop simulations, where both the true geometry and stochastic model are under control, we investigate how variations of the parameters of the IM affect the results of a LS adjustment. As a case study, we consider the determination of the Cartesian coordinates of the control points (CP) from a B-splines curve. We show that a constant variance can be assessed to all the points of an object having homogeneous properties, without affecting the a posteriori variance factor or the loss of efficiency of the LS solution. The results from a real case scenario highlight that the conclusions of the simulations stay valid even for more challenging geometries. A procedure to determine the range variance is proposed to simplify the computation of the VCM.

scholarly journals INTEGRATION OF GEOMATICS TECHNIQUES FOR DIGITIZING HIGHLY RELEVANT GEOLOGICAL AND CULTURAL HERITAGE SITES: THE CASE OF SAN LEO (ITALY)

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 281-286 ◽  
Author(s):  
V. A. Girelli ◽  
L. Borgatti ◽  
M. Dellapasqua ◽  
E. Mandanici ◽  
M. C. Spreafico ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Large Scale ◽  
Laser Scanner ◽  
Terrestrial Laser Scanner ◽  
Heritage Sites ◽  
Research Activities ◽  
Dense Point ◽  
Geometrical Information ◽  
Historical Heritage ◽  
The Town

The research activities described in this contribution were carried out at San Leo (Italy). The town is located on the top of a quadrangular rock slab affected by a complex system of fractures and has a wealth of cultural heritage, as evidenced by the UNESCO’s nomination.<br><br> The management of this fragile set requires a comprehensive system of geometrical information to analyse and preserve all the geological and cultural features. In this perspective, the latest Geomatics techniques were used to perform some detailed surveys and to manage the great amount of acquired geometrical knowledge of both natural (the cliff) and historical heritage. All the data were also georeferenced in a unique reference system.<br><br> In particular, high accurate terrestrial laser scanner surveys were performed for the whole cliff, in order to obtain a dense point cloud useful for a large number of geological studies, among others the analyses of the last rockslide by comparing pre- and post-event data.<br><br> Moreover, the geometrical representation of the historical centre was performed using different approaches, in order to generate an accurate DTM and DSM of the site. For these purposes, a large scale numerical map was used, integrating the data with GNSS and laser surveys of the area.<br><br> Finally, many surveys were performed with different approaches on some of the most relevant monuments of the town. In fact, these surveys were performed by terrestrial laser scanner, light structured scanner and photogrammetry, the last mainly applied with the Structure from Motion approach.

scholarly journals DEFORMATION MEASUREMENT USING TERRESTRIAL LASER SCANNER FOR CULTURAL HERITAGE

2016 ◽  
Vol XLII-2/W1 ◽  
pp. 89-93 ◽  
Author(s):  
M. O. Selbesoglu ◽  
T. Bakirman ◽  
O. Gokbayrak
Keyword(s):  
Cultural Heritage ◽  
Natural Hazards ◽  
Real World ◽  
Laser Scanner ◽  
Essential Element ◽  
High Accuracy ◽  
Cylindrical Part ◽  
Terrestrial Laser Scanner ◽  
Historical Structures ◽  
Digital Documentation

Historical structures are one of the most essential element of cultural heritage. They reflect history, lifestyle and tradition of a country and society. However, they are damaged through the years due to human activities and natural hazards. Therefore, digital documentation of structures and monuments is critical for preservation, sustainability and protection of cultural heritage. Terrestrial laser scanner is a widespread used tool for obtaining 3D representation of real world. In this study, we aimed to measure deformation of deformed minaret of a historical mosque using terrestrial laser scanner. In order to represent the geometry of the deformed minaret with high accuracy, 31 horizontal sections were created from the transition segment to the spire of the minaret with 30 cm intervals. The changing curvatures of the minaret were analysed in three parts; cylindrical part, balcony part and upper part. The offsets from the vertical axes for the parts of the minaret were found as 10.14 cm, 13.97 cm and 16.51 cm, respectively.

scholarly journals Tree Parameters retrieval and volume estimation using Terrestrial Laser Scanner: A case Study on Barkot Forest

2019 ◽  
Author(s):  
Rajarshi Bhattacharjee ◽  
Amitesh Gupta ◽  
Dr. Subrata Nandy ◽  
Triparna Sett
Keyword(s):  
Laser Scanner ◽  
Volume Estimation ◽  
Terrestrial Laser Scanner
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