Extraction of building roof edges from LiDAR data to optimize the digital surface model for true orthophoto generation

Various kinds of urban applications require true orthophotos. True orthophoto generation requires a DSM (Digital Surface Model) to project the photo orthogonally and minimize geometric distortion due to topographic variance. DSMs are often generated from airborne laser scan data. In urban scenes, DSM data may fail to deliver sharp and...

Automatic generation of raster-based height data for the Netherlands based on the AHN2 data set

The recent emergence of Light Detection And Ranging (LiDAR) scanning technology has resulted in the availability of very large three dimensional point cloud data sets. These LiDAR data sets have become a main source for the modeling and reconstruction of both ground surface as well as above-ground objects such as buildings and vegetation. For...

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...