This paper presents an approach to process raw lidar 3-D point clouds over urban area and extract terrain, buildings and other urban features. In the initial step, “non-ground points” are separated from ground points using a one dimensional filtering process based on the slope between two consecutive points in the point cloud and the terrain elevation in the vicinity of the points. In the next ...

Anthropogenic modification of the water cycle involves a diversity of processes, many of which have been studied intensively using models and observations. Effective tools for measuring the contribution and fate of combustion-derived water vapor in the atmosphere are lacking, however, and this flux has received relatively little attention. We provide theoretical estimates and a first set of mea...

Wind tunnel experiments were carried out on four urban morphologies: two tall canopies with uniform-height and super-tall a large variation in element heights (where the maximum height is more than double average canopy height, $h_{max}$=2.5 $h_{avg}$). {The packing density fixed across surfaces to $h_{avg} = 80$ mm, $\lambda_{p} 0.44$, respectively.} A combination of laser doppler anemometry d...

This study explores the combined application of remote sensing, spatial metrics and spatial modeling to the analysis and modeling of urban growth in Santa Barbara, California. The investigation is based on a 72-year time series data set compiled from interpreted historical aerial photography and from IKONOS satellite imagery. Spatial metrics were used both specifically to assess the impact of u...

In this article a method based on data fusion approach and using multitemporal ASAR-ENVISAT / PRI-ERS SAR images to analyze different behaviours (urban growth, urban decrease and urban constance) of the urban dynamics phenomenon in rain forest context is proposed. The method computes first two attributes : NDVI index used as urban / non-urban index and as prior information to improve locally th...

Study of the land-use/land cover (LULC) changes close to the boundary of the buildup area (urban fringe) provides deeper understanding of a land-use dynamics at different spatial and temporal scales. Few thoughts have given to the analysis of complicated spatial landscape at a fringe area. The aim of this paper is to resolve this bias by focusing on these interfaces. Results of this paper show ...