New paper identifying spatiotemporal urban activities through linguistic signatures

Aug 21, 2018

A new paper lead by Cheng Fu was recently accepted for publication in Computers, Environment, and Urban Planning. This publication represents part of his recently defended PhD dissertation. Congratulations Cheng.

Abstract: Identifying the activities that individuals conduct in a city is key to understanding urban dynamics. It is difficult, however, to identify different human activities on...

New paper exploring the similarities between tourist attractions

Aug 6, 2018

The motivation for tourists to visit a city is often driven by the uniqueness of the attractions accessible within the region. The draw to these locations varies by visitor as some travellers are interested in a single specific attraction while others prefer thematic travel. Tourists today have access to detailed experiences of other visitors to these locations in the form of user-contributed text reviews, opinions, photographs, and videos, all contributed through online tourism platforms....

Two short papers to be presented at GIScience 2018 in Melbourne, Australia

Jun 4, 2018

We are excited to be presenting two short (peer reviewed) papers at the 10th International Conference on Geographic Information Science (GIScience 18) in Melbourne, Australia at the end of August. The two papers cover very different topics, but both very relevant to human activity behavior and mobility. More information on the papers, including abstracts, are below:

Docked vs. Dockless Bike-sharing: Contrasting Spatiotemporal Patterns

CfP: Special Feature on Geospatial Privacy & Security in JoSIS

May 25, 2018

Call for Papers! Special Feature issue on Geospatial Privacy & Security in the Journal of Spatial Information Science

Read Full Call Here

Location privacy has been a consistent theme in spatial information science for quite some time. While early work on this topic was primarily focused on...

We are moving

May 23, 2018

Grant McKenzie has accepted a professorship position at McGill University in the department of Geography starting August, 2018. This means that the lab will be moving north of the border up to McGill University in Montréal, Québec, Canada. Please drop us an email if you will be coming through Montréal as we would love to show you around. In other news, we decided to go ahead and alter the lab name from "Place Time Analysis Lab" to just "Platial Analysis Lab" as it better reflects what we...

New post in UMD's Geograffiti newsletter

Feb 23, 2018

Nice little write up about the AGILE conference in this semester's department newsletter. In May of this year, CGIS Professor Grant McKenzie attended AGILE 2017, the 20th annual international conference on Geographic Information Science put together by the Association of Geographic Information Laboratories in Europe. This year’s theme was Societal Geo-Innovation and took place at the University of Wageningen in The Netherlands. Wageningen is a historic town in the center of the...

Dynamic Place Type Regions - Visual Analytics Platform

Nov 1, 2017

Place-based social sharing applications offer new opportunities to better understand the dynamics of human activity behavior. These application provide access to billions of user location check-ins that promote a better understand of the popularity of places and regions within a city. In this work, we present a visual analytics platform for exploring the dynamics of place-driven urban activity behavior. This platform allows users to exploit the spatiotemporal resolution of place...

Special Issue on GeoAI: Artificial Intelligence Techniques for Geographic Knowledge Discovery

Oct 17, 2017

Open Call for Submissions

Special Issue on GeoAI: Artificial Intelligence Techniques for Geographic Knowledge Discovery

To be published in the International Journal of Geographical Information Science

Guest Editors
Krzysztof Janowicz, Budhendra L. Bhaduri, Song Gao, Yingjie Hu, and Grant McKenzie.

The theme and scope
Novel Artificial Intelligence (AI) techniques are transforming a...

Thematic Place Types

Oct 3, 2017


The project introduces an interactive platform for exploring thematic place types. Users can investigate the impact of time on thematic regions to better understand the urban dynamics involved in a city. The underlying data is based on approximately 3 million geosocial media check-ins from across the United States.


ISED: Constructing a high-resolution elevation road dataset from massive, low-quality in-situ observations derived from geosocial fitness tracking data

Oct 3, 2017

Our paper entitle "ISED: Constructing a high-resolution elevation road dataset from massive, low-quality in-situ observations derived from geosocial fitness tracking data" was recently accepted for publication in the open access journal PLoS ONE.

Gaining access to inexpensive, high-resolution, up-to-date, three-dimensional road network data is a top priority beyond research, as such data would fuel applications in industry, governments, and the broader public alike....