Slope instabilities are one of the most important geo-hazards in terms of socio-economic costs. The island of La Réunion (Indian Ocean) is affected by constant slope movements and huge landslides due to a combination of rough topography, wet tropical climate and its specific geological context. We show that remote sensing techniques (Differential SAR Interferometry and correlation of optical im...

The mission of an Agile Earth Observing Satellite (AEOS) is to acquire photographs on the Earth surface, in response to observation requests. The management problem of an AEOS is to select and schedule a subset of weighted images among a set of candidate ones which must satisfy imperative constraints and at the same time maximize a given profit function. This new generation of satellites, like ...

This Paper uses MODIS data to monitor and evaluate cultivated land changes in Yangtze River Delta region. Firstly, In order to validate the veracity of the classification results by MODIS, Hangzhou city is selected as the experimental area, Spot5 and Landsat scenes in 2001 and 2005 are collected and used to conduct initial validation exercises to assess the quality of land use classification re...

The aim of this paper is to study the impact of using various models for the determination of orientation parameters or georeferencing of high resolution satellite images, on the accuracy of the extracted DSM and orthorectified images. Empirical and physically based models are investigated: Rational Functions (RFC), Toutin’s model and orbital parameter model, in which the satellite trajectories...

Virtual flights over a Digital Surface Model (DSM) textured with an image are now widely used for communication purposes towards the general public, decision-makers and non-specialists in general. Furthermore, recent advances in computer science and virtual reality make very easy to perform such flights, even on a standard laptop. Examples will be given with SPOT5 2.5m colour images applied to ...

Following SPOT5 launch, Spot Image and French National Geographic Institute (IGN) have decided to design a worldwide accurate database called Reference3DTM using data from the High Resolution Stereoscopic SPOT5 instrument (HRS). This database consists in three information layers : Digital Elevation Model at 1 arc.second resolution, Orthoimage at 1/6th arc.second resolution and Quality Masks ; w...

There is a great challenge in combining soil proximal spectra and remote sensing spectra to improve the accuracy of soil organic carbon (SOC) models. This is primarily because mixing of spectral data from different sources and technologies to improve soil models is still in its infancy. The first objective of this study was to integrate information of SOC derived from visible near-infrared refl...

The woodland which covers mainly the district in Jinyunshan Mountain ,Zhongliangshan Moutain, Tongluoshan Mountain and Mingyueshan Mountain area , is very important to accommodate ecological environment ,and is called the “lung” of Chongqing . But these limited resource is dieing out gradually in the process of urbanization and industrialization .In order to keep them from disappearing, we must...

Virtual reality technology has been applied to the protection of cultural heritage for about 20 years. However, methods or systems of cultural heritage reported in previous studies are still unable to represent large-scale cultural heritage sites such as the Beijing-Hangzhou Grand Canal, the Struve Geodetic Arc and the boundaries of the Roman Empire. We aimed at constructing a large-scale cultu...