A summary of research in urban feature extraction being conducted under a MURI (multi-disciplinary research initiative) program sponsored by the U.S. Army Research Office is provided. Most of the paper focuses on extraction of rectilinear building models. Feature extraction from aerial images is difficult due to problems of segmentation, 3-D inference and shape description. A system for buildin...

− This paper examines the use of different classifiers for integrating multi-temporal remotely sensed data with landform data derived from digital elevation models to produce maps showing areas affected by salinity in the south west agricultural region of Western Australia. Decision trees are used to map saline areas in the Ryan’s Brook catchment, located approximately 50 kilometres southwest o...

Large gradients, when calculated by a first-difference method, have been detected in the 9 arc-second National Digital Elevation Model (DEM) of Australia released by the Australian Surveying and Land Information Group. Gradient values implied by the mean elevations in the DEM between adjacent grid cells of up to 74° have been observed, most notably in Australia’s more mountainous regions in the...

A solar 3D urban model was developed for the calculation and visualisation of the solar energy potential of buildings, integrating the potential of roofs with that of facades. To assess this potential, a digital surface model (DSM) of the urban region was built from LiDAR data and a solar radiation model based on climatic observations was applied. A shadow algorithm was developed in order to ca...

Objective: The aim of this study is to provide a management plan for the Sykan watershed of Darre shahr city located in Ilam province using GIS in land use planning. Methods: For land using of Sykan watershed of Ilam province with about 9 hectares area, map of classes, elevation, percent slope, geographical aspects, soil characteristics, vegetation density and the final map units were combined ...

The past years needs for Digital Elevation Models and consequently for 3D simulations requested in various applications had led to the development of fast and accurate terrain topography measurement techniques. In this paper, we are presenting a novel framework dedicated to the automatic or semiautomatic processing of scanned maps, extracting the contour lines vectors and building a digital ele...

Elevation map generation is an essential component of any autonomous underwater vehicle designed to navigate close to the seafloor because elevation maps are used for obstacle avoidance, path planning and self localization. We present an algorithm for the reconstruction of elevation maps of the seafloor from side-scan sonar backscatter images and sparse bathymetric points coregistered within th...

While digital panoramic photography taken along travelling routes is very popular, digital panoramic strip maps are virtually nonexistent. In this article, we explore the characteristics of panoramic strip maps and provide an interactive method for their digital creation, focusing on the challenge of straightening curved routes. The resulting software Terrain Bender implements a geometric defor...

The approach described in this paper is intended for 3D building reconstruction on large and dense urban areas. It provides a real-time solution for automatic inferring of polyhedral rooftops of buildings from cadastral maps and aerial images. From the initial planimetric outline and hypotheses of planes inferred from it, a set of rooftop models depending on two parameters (slope and gutter alt...