A MapReduce-Based Big Spatial Data Framework for Solving the Problem of Covering a Polygon with Orthogonal Rectangles

Abstract: The polygon covering problem is an important class of problems in the area of computational geometry. There are slightly different versions of this problem depending on the types of polygons to be addressed. In this paper, we focus on finding an answer to a question of whether an orthogonal rectangle, or spatial query window, … Read more

A Distributed Map Animation Framework for Spatiotemporal Datasets

Maps are an excellent way to present data that have spatial components. However, when the data being presented vary over time, a simple two-dimensional map ignores an important feature of the data. An animated map that shows a series of two-dimensional maps at successive points in time allows one to add a time dimension to … Read more

An automated technique to determine spatio-temporal changes in satellite island images with vectorization and spatial queries

Abstract. For spatio-temporal and topologic analyses, vectorial information (car- rying coordinate values defined as point sets) gives better information than its raster (grid of pixels) counterpart. The study presented in this paper is based on (i) recogni- tion and extraction of an island object in a set of digital images captured by LandSat-7 satellite and … Read more

Adaptive proxy map server for efficient vector spatial data rendering

Abstract. The rapid transmission of vector map data over the Internet is becoming a bottleneck of spatial data delivery and visualization in web-based environment because of increasing data amount and limited network bandwidth. In order to improve both the transmission and rendering performances of vector spatial data over the Internet, we propose a proxy map … Read more

Evaluation of Different Algorithms for Measuring the Similarities of Trajectory Datasets

Abstract—With the techologicaltechnological development of global positioning system and video survelliancesurveillance systems and extensive utilization of socailsocial media platforms, large amounts of trajectories data are captured. Processing and analysinganalyzing of moving obgectsobjects such as people, animals, and vehicles provides valuable information for industrial and academic studies. about them. In this study, three different similarity algorithms … Read more

Modeling and Querying Trajectories using Neo4j Spatial and TimeTree for Carpool Matching

Abstract—With the the exponential growth of location aware devices, analysis of human movements has been the subject of several studies. Problems related to urban mobility such as vehicle congestion are serious concern in cities. Carpooling is one of the solutions to soften congestion problem. This paper presents a novel matching method for carpooling. Trajectories are … Read more