Mobile mapping techniques represent an efficient way to supply the requirements imposed by the development of 3D GIS, urban digital models and their applications using virtual and augmented reality. The methods widely applied in this domain depend on the video and photogrammetric sensors which provide accurate results but with long time of post-processing. Hence, the integration of a terrestria...

Recently, a laser scanner technology has been receiving more attention. Nowadays use of terrestrial laser scanners (TLS) is continuously increasing. This technique offers the possibility of measuring millions of points within short period of time. Thus, it is possible to record complete 3D objects efficiently. In this communication the process followed to model the hull and the deck of the ship...

The point density in a single-scan terrestrial laser scanner (TLS) point cloud is very dense close to the scanner and gets sparser as the distance from the scanner increases. A full circular scan can contain tens of millions of points, which is impractical for most algorithms that work on point data. The number of points can be reduced by taking a sample of the original data. We have studied wh...

The 3D geometry of an object can be captured very efficiently using a terrestrial laser scanner. By modelling and visualisation of these 3D data, it is possible to obtain vectorized geometric information of the object. Many users prefer to work on profiles, motivated by the handling of paper prints in the field by their own familiarization. Profiles extracted from laser scanner point clouds wil...

This paper presents a data set collected periodically on construction site. The aims to evaluate the performance of simultaneous localization and mapping (SLAM) algorithms used by mobile scanners or autonomous robots. It includes ground-truth scans site using terrestrial laser scanner along with five sequences spatially registered time-synchronized images, lidar scans, inertial coming from our ...

In many 3D laser scanner applications, high relative precision (relative dimensions within the registered point cloud) is sufficient; in contrast, DOT applications require good relative precision and high absolute accuracy. Thus, precise and robust geo-referencing is critical, and robust workflows are needed to reduce the likelihood and impact of human errors. DOT applications have a fairly uni...

3D digital surveying and modelling of cave geometry represents a relevant approach for research, management and preservation of our cultural and geological legacy. In this paper, a multi-sensor approach based on a terrestrial laser scanner, a high-resolution digital camera and a total station is presented. Two emblematic caves of Paleolithic human occupation and situated in northern Spain, "Las...

Within the scope of a common evaluation of brightness, range and intensity images, this article introduces a new area based approach to achieve the simultaneous orientation of multiple data types. The actual innovation is the combined least-squares adjustment, which is an extension of object space image matching with ranges and intensities as additional observations. The complete mathematical m...

Meteorological simulation tools to model gas exchange phenomena within forests require well defined information of forest structure (e.g., 3D forest models) as a basis for the computation of the turbulent flow shaped by the drag of the vegetation. The paper describes techniques to obtain 3D data describing forest stands from dense terrestrial laser scanner point clouds. In a first step, stems a...

The paper presents the calibration and analysis of a terrestrial laser scanner Riegl LMS-Z420i. Two different calibration fields were scanned with this laser scanner from different positions. The calibration fields are equipped with signalized targets to be measured within the laser scanner point cloud interactively or automatically. The measured spherical coordinates (distance, horizontal angl...