This paper presents an obstacle avoidance system for the Segway Robotic Mobility Platform (RMP). The system consists of four main modules: terrain mapping, terrain traversability analysis, path planning, and motion control. The main sensor in our system is a forward/downward-looking 2-D Sick laser rangefinder. The terrain mapping module registers realtime laser range data into a grid-type eleva...

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 semiautomatic processing of scanned maps, extracting the contour lines vectors and building a digital elevation model on their basis, fulfilled by a number of stages discussed in detail thr...

We describe a project that is monitoring land condition in the south west of Western Australia using Landsat Thematric Mapper satellite images and terrain data derived from digital elevation models (DEMs). Land Monitor is a multi-agency project of the Western Australian Salinity Action Plan supported by the Natural Heritage Trust. The focus of the project is on broad-scale monitoring of land co...

This study describes a new method developed to determine the 3D positional displacements of the drainage networks extracted from Digital Elevation Models (DEMs). The proposed method establishes several stages for data preparation. The displacements are derived by means of linestring-based assessment methods, which can be applied in 2D and 3D. Also, we propose the use of several tools (maps, agg...

Routing is a common task when using digital maps, but most engines offer only travel routes for automobiles. However, a more interesting aspect in this topic arises when being a cyclist. For this target audience especially elevation information is relevant. Such data is available from different sources, but is not perfectly usable for cycling routing. Those digital elevation models may include ...

Three-dimensional (3-D) maps of the nearside and polar regions of the Moon can be obtained with an Earth-based radar interferometer. This paper describes the theoretical background, experimental setup, and processing techniques for a sequence of observations performed with the Goldstone Solar System Radar in 1997. These data provide radar imagery and digital elevation models of the polar areas ...

The paper is focused on Digital Elevation Model (DEM) reconstruction from differential interferometry synthetic aperture radar (DInSAR). In doing so, conventional DInSAR procedures are implemented to three repeat passes of RADARSAT-1 SAR fine mode data (F1). Further, the multichannel MAP height estimator is implemented with phase unwrapping technique. Consequently, the multichannel MAP height e...

Geostatistical models for spatial prediction are based on observations points. When ancillary information related to the target variable is available, it can be used to improve the estimations. Some sources of information, like satellite images or digital elevation models, provide full information for the whole study area, improving even more the point estimation. It is useful when the target v...

We show how a series of satellite images used in conjunction with data derived from a digital terrain model can be used to monitor salinity in farmland. Using these data, a conditional probability network (CPN) is constructed to produce salinity maps. The maps are the result of combining uncertain information in images with uncertain knowledge or rules, where the rules are of a temporal and spa...

Describing vegetation types is critical for managing natural resources and assessing ecosystem risk. Vegetation maps are historically produced by “Western experts,” often ignoring local-level groups critical to resource management. Indigenous hunters, as resource managers, have strong connections to their landscapes and their descriptions of vegetation within their homelands can be useful in th...