Morphological changes along a dike landside slope sampled by 4D high resolution terrestrial laser scanning

Emergence of light detection and ranging (LiDAR) technology provides new tools for geomorphologic studies improving spatial and temporal resolution of data sampling hydrogeological instability phenomena. Specifically, terrestrial laser scanning (TLS) collects high resolution 3D point clouds allowing more accurate monitoring of erosion rates...

Applications of 3D City Models: State of the Art Review

In the last decades, 3D city models appear to have been predominantly used for visualisation; however, today they are being increasingly employed in a number of domains and for a large range of tasks beyond visualisation. In this paper, we seek to understand and document the state of the art regarding the utilisation of 3D city models across...

Automatic Tree Breast Height Diameter Estimation from Laser Mobile Mapping Data in an Urban Context

This study focuses on developing an innovative methodology to automatically estimate the diameter at breast height (DBH) of urban trees sampled by a Laser Mobile Mapping System (LMMS). The high-quality results confirm the feasibility of the proposed methodology, providingscalability to a comprehensive analysis of urban trees.

Aspects of Representing LiDAR Data Used for Updating

Performing environmental spatial analysis requires the collection of base data and special data, subject to the type of analysis in hand, among this data of course LiDAR data can be of much usefulness, in our particular case mobile network data were collected to assess the usefulness of using it for updating some features of the base map that...

The Vectorial Segmentation of Buildings in Vila Cafezal Informal Settlement Aimed at 3D Cadastre Creation

The informal settlement is a degraded public or private owned area of a particular city characterized by substandard housing, lack of infrastructure and without land tenure regularization. It is a characteristic of urban settlement that emerged in the early twentieth century, a consequence of the process of uneven economic development between...

Terrestrial laser scanning for geometry extraction and change monitoring of rubble mound breakwaters

Rubble mound breakwaters are coastal defense structures that protect harbors and beaches from the impacts of both littoral drift and storm waves. They occasionally break, leading to catastrophic damage to surrounding human populations and resulting in huge economic and environmental losses. Ensuring their stability is considered to be of...

Simplified 3D city models from LiDAR

Aerial laser scan data is widely used to produce 2½D digital elevation models automatically. However, creating full 3D city models from this data is a complex task. A simplified 3D model, like a 2½D model with vertical walls will be easier to produce automatically, especially when the model is not produced to look nice, but just to give...

Performance evaluation of automated approaches to building detection in multi-source aerial data

Automated approaches to building detection in multi-source aerial data are important in many applications, including map updating, city modeling, urban growth analysis and monitoring of informal settlements. This paper presents a comparative analysis of different methods for automated building detection in aerial images and laser data at...

Skeleton-based botanic tree diameter estimation from dense LiDAR data

New airborne LiDAR (Light Detection and Ranging) measurement systems, like the FLI-MAP 400 System, make it possible to obtain high density data containing far more information about single objects, like trees, than traditional airborne laser systems. Therefore, it becomes feasible to analyze geometric properties of trees on the individual object...

Automated 3D modeling of buildings in suburban areas based on integration of image and height data