In this paper we address the problem of content-based image retrieval using queries on shape and topology. We focus on the particularities of image databases encountered in typical topographic applications, and present the development of a spatial data management system that enables such queries. The query uses as input user-provided sketches of the shape and spatial configuration of the object...

Land management and planning is crucial for present and future use of land and the sustainability of land resources. Physical, biological and cultural characteristics of land can be used to define Land Management Units (LMUs) that aid in decision making for managing land and communicating information between different research and application domains. This study aims to describe the classificat...

We described in this report the essential geographic layers used as landscape drivers for the Marco Polo Argali habitat in the eastern Tajik Pamirs. Using remote sensing techniques and geographic information systems (GIS), individual layers were generated in order to acquire more information on argali patterns and habitat suitability and to make the dataset available online. We introduced an im...

Title: Topography-Based Screening for Previous Laser in Situ Keratomileusis for Myopia and Hyperopia Purpose: To develop a screening tool based on corneal topography to detect previous myopic and hyperopic laser in situ keratomileusis (LASIK). Settings: Clinical data from three private clinics analyzed in a university setting. Methods: 476 topographies (Orbscan II, Bausch & Lomb) were randomly ...

Most glaciers in China lie in high mountainous environments and have relatively large surface slopes. Common analyses consider glaciers’ projected areas (2D Area) in a two-dimensional plane, which are much smaller than glacier’s topographic surface extents (3D Area). The areal difference between 2D planar areas and 3D surface extents exceeds −5% when the glacier’s surface slope is larger than 1...

In this paper the accuracy of automatic DTM computation on the digital photogrammetric workstation DPW770 of LeicaHelava will be discussed. The software component of the photogrammetric System is the Softcopy Exploitation Tool (SOCET SET) by Helava, with module "Terrain". Basis for the investigation was a test data set (image scale 1:13000) of the Institute for Photogrammetrie of Stuttgart Univ...

A very peculiar damage patterns have been reported during Northridge earthquake of 1994 and Nisqually earthquake of 2001 caused by basement focusing. Similarly, basement de-focusing may cause lesser damage than the expectations but such inferences have not been reported. Further, as far as we know, no theoretical study related to de-focusing effects of anticlinal basement topography (ABT) is av...

The simulation model was built using an agentbased modelling approach. The approach builds a virtual landscape ecosystem and simulates how the various components of the forest ecosystem fit together and interact with each other. Fire is the main disturbance source in the succession of the eucalypt forest ecosystem in this area and plays a critical role in the process of patterning the forested ...

Effective flood incident management requires successful operation of complex, interacting human and technological systems. A dynamic agent based model of FIM processes has been developed to provide new insights which can be used for policy analysis and other practical applications. The model integrates remotely sensed information on topography, buildings and road networks with empirical survey ...

High and accelerating rate of the urban changes and extensions, in developing countries such as Egypt, calls for an efficient and fast technique for mapping. The availability of the new generation commercial one-meter resolution satellite images has opened a new era for producing and updating large-scale digital maps. The main objective of this study is to evaluate the potential of VHR satellit...