In the paper, we consider the problem of computing visibility information on digital terrain models. Visibility problems on polyhedral terrains are classi ed according to the kind of visibility information computed into point visibility, line visibility and region visibility. A survey of the state-of-the-art of the algorithms for computing visibility is presented, according to the classi cation...

High quality sedimentary measurements are required for studying fluvial geomorphology and hydrological processes e.g., flood and river dynamics. Mobile laser scanning (MLS) currently provides the opportunity to achieve high precision measurements of coarse fluvial sediments in a large survey area. Our study aims to investigate the capability of single-track MLS data for individual particle-base...

Spaceborne Interferometric Synthetic Aperture Radar (InSAR) has been demonstrated to be a potential tool for generating digital elevation models (DEM). The co-registration of SAR complex images is one of the most important processing procedures involved in InSAR . The quality of the co-registration significantly influences the final quality of any SAR interferometric generation, and thus the qu...

Using a geographic transect in Central Mexico, with an elevation/climate gradient, but uniformity in socio-economic conditions among study sites, this study evaluates the applicability of three widely-used remote sensing (RS) products to link weather conditions with the local abundance of the dengue virus mosquito vector, Aedes aegypti (Ae. aegypti). Field-derived entomological measures include...

With the improvements in sensor technologies over the past decade, there has been a significant decrease in the cost of acquisition and increase in the density and accuracy of Light Detection and Ranging (LiDAR) data. Due to its advantages over traditional surveying techniques, LiDAR data are widely preferred for floodplain delineation. But, processing dense LiDAR data is time-consuming and mem...

The aim of this paper is twofold: first, it simplifies ‘solar envelope’ calculations, making them easier to carry out over extensive urban areas; second, the proposed routines refine the definition of solar envelopes so that they reflect more accurately the actual irradiation of the city and make results directly applicable in urban planning. Both targets can be achieved if we use a new techniq...

In this paper we explore the performances and the opportunities provided by the European satellite Sentinel-1 for water resource management applications in low-income countries. The analysis is supported by a synthetic aperture radar (SAR) simulator, which allowed the quantification of the expected characteristics of Sentinel-1 products in three applications: interferometric digital elevation m...

We study the practical aspects of performing terrain corrections in airborne/seaborne gravity gradient surveys in terms of necessary spatial extents and required resolution of digital elevation models. We develop a new and practical method for performing terrain corrections through an extension of Parker’s 1972 method for calculating potential anomalies in the Fourier domain. We then study and ...