An Intelligent System for Map Data Processing in Geographic Information Systems W. Feng University of Illinois at Urbana-Champaign 1304 W. Spring eld Avenue Urbana, IL 61801 E-mail: [email protected] Abstract A geographic information system (GIS) allows users to collect, analyze, and manage a large amount of spatially referenced data. Our GIS incorporates computer graphics, image processing, dat...

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...

Combinatorial maps are widely used in image representation and processing, however map matching problems have not been extensively researched. This paper addresses the problem of inexact matching between labeled combinatorial maps. First, the concept of edit distance is extended to combinatorial maps, and then used to define mapping between combinatorial maps as a sequence of edit operations th...

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...

To characterize temporal aspects of information processing in the human visual field, we studied the topographical distribution of temporal and non-temporal performance parameters in 95 normally sighted subjects. Visual field maps of double-pulse resolution thresholds (DPR) (the minimum detectable temporal gap between two light stimuli) and simple visual reaction times (RT) (measuring the speed...

Global online maps are an important tool and data sets such for such maps are normally provided by commercial providers or public authorities. Nevertheless, the ever expanding trend of collaboratively collected geodata by hobbyists, namely Volunteered Geographic Information (VGI), increases regarding both data quantity and quality. Therefore, VGI can be considered as a real alternative data sou...