This paper demonstrates the possibilities of a Geographical Information System (GIS) for investigating and explicating spatial variation short-range viewshed aesthetic appeal in World Heritage coastal dune forest area. The study pursues following objectives: (1) develop trial GIS-based algorithm computing Aesthetic Appeal Index Short-Range Viewshed (?); (2) deliver an output map showing compute...

Abstract Central counterparty (CCP) default waterfalls act as the last lines of defense in over-the-counter markets by managing and allocating resources to cover payment defaults. This article examines impact variations waterfall design on financial system losses presence network dependencies frictions cleared noncleared portion system. Through development a structural model, we draw several th...

The analysis of social media content for the extraction of geospatial information and event-related knowledge has recently received substantial attention. In this article we present an approach that leverages the complementary nature of social multimedia content by utilizing heterogeneous sources of social media feeds to assess the impact area of a natural disaster. More specifically, we introd...

Viewshed (or visibility map) computation is an important component in many GIScience applications and, as nowadays there are huge volume of terrain data available at high resolutions, it is important to develop efficient algorithms to process these data. Since the main improvements on modern processors come from multi-core architectures, parallel programming provides a promising means for devel...

Abstract: This study sought to identify the ichthyofauna composition of Muzambinho River, an upland tributary Paraná River. We also investigate whether waterfalls in region can serve as barriers dispersal fish species. For this purpose, collections were carried out at 34 points on River using different techniques. In all, 37 species recorded, some which endemic, and majority native. Among these...

In archaeological research, visibility analysis is usually based on binary viewshed maps. However, Digital Elevation Models inherently contain errors due to inaccuracies in the original topographic data and the data structure used. Therefore the binary classification will be subject to an unknown amount of error. It would be more appropriate to use a method for visibility calculation which allo...