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...

Visibility analysis or Viewshed is a common function of almost all GIS systems. The aim of this project is to find out the best solution, to compute viewshed for the Olomouc region and ensure the best way of visualisation of the results. The first step to analyze the visibility is making a high quality Digital Terrain Model, choice of the best interpolation method and subsequent addition of veg...

The knowledge of visibility information on a terrain is essential for a large number of current applications. There exist several algorithms in the literature for building visibility maps (VMs) but only for one single viewpoint or at most for a very small number of observers. This limitation is due to the high computational complexity of the used methods (which is greater than O(N2), where N is...

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...

Note: To follow this note and especially to get definitions of concepts as lower catchment basin, FOZ, dual geodesic reconstruction, I STRONGLY recommend to read the following documents available on my Web page (http://cmm.ensmp.fr/~beucher/publi.html): P algorithm, a dramatic enhancement of the waterfal transformation (http://cmm.ensmp.fr/~beucher/publi/P-Algorithm_SB_BM.pdf, in particular, pa...