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ACM Transactions on Spatial Algorithms and Systems (TSAS), Volume 3 Issue 4, May 2018

Spatio-Temporal Matching for Urban Transportation Applications
Daniel Ayala, Ouri Wolfson, Bhaskar Dasgupta, Jie Lin, Bo Xu
Article No.: 11
DOI: 10.1145/3183344

In this article, we present a search problem in which mobile agents are searching for static resources. Each agent wants to obtain exactly one resource. Both agents and resources are spatially located on a road network and the...

Analyzing and Predicting Spatial Crime Distribution Using Crowdsourced and Open Data
Alexandros Belesiotis, George Papadakis, Dimitrios Skoutas
Article No.: 12
DOI: 10.1145/3190345

Data analytics has an ever increasing impact on tackling various societal challenges. In this article, we investigate how data from several heterogeneous online sources can be used to discover insights and make predictions about the spatial...

Batch Processing of Top-k Spatial-Textual Queries
Farhana M. Choudhury, J. Shane Culpepper, Zhifeng Bao, Timos Sellis
Article No.: 13
DOI: 10.1145/3196155

Since the mid-2000s, everal indexing techniques have been proposed to efficiently answer top-k spatial-textual queries. However, all of these approaches focus on answering one query at a time. In contrast, how to design efficient algorithms...