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ACM Transactions on Spatial Algorithms and Systems (TSAS) - Regular Papers and SIGSPATIAL Paper, Volume 2 Issue 4, November 2016



Section: Regular Papers

Matching Labels and Markers in Historical Maps: An Algorithm with Interactive Postprocessing
Benedikt Budig, Thomas C. Van Dijk, Alexander Wolff
Article No.: 13
DOI: 10.1145/2994598

In this article, we present an algorithmic system for determining the proper correspondence between place markers and their labels in historical maps. We assume that the locations of place markers (usually pictographs) and labels (pieces of text)...

On Local Expert Discovery via Geo-Located Crowds, Queries, and Candidates
Wei Niu, Zhijiao Liu, James Caverlee
Article No.: 14
DOI: 10.1145/2994599

Local experts are critical for many location-sensitive information needs, and yet there is a research gap in our understanding of the factors impacting who is recognized as a local expert and in methods for discovering local experts. Hence, in...

Online Spatial Event Forecasting in Microblogs
Liang Zhao, Feng Chen, Chang-Tien Lu, Naren Ramakrishnan
Article No.: 15
DOI: 10.1145/2997642

Event forecasting from social media data streams has many applications. Existing approaches focus on forecasting temporal events (such as elections and sports) but as yet cannot forecast spatiotemporal events such as civil unrest and influenza...

Section: Regular Papers

Personalized Group Recommender Systems for Location- and Event-Based Social Networks
Sanjay Purushotham, C.-C. Jay Kuo
Article No.: 16
DOI: 10.1145/2987381

Location-Based Social Networks (LBSNs) such as Foursquare, Google+ Local, and so on, and Event-Based Social Networks (EBSNs) such as Meetup, Plancast, and so on, have become popular platforms for users to plan, organize, and attend social events...