55 citations · 178 across the 7 of their papers we have counts for
7 papers
Why Topology Matters in Predicting Human Activities
Ding Ma, Itzhak Omer, Toshihiro Osaragi +2
Geographic space is better understood through the topological relationship of the underlying streets (note: entire streets rather than street segments), which enables us to see sca…
A Smooth Curve as a Fractal Under the Third Definition
Ding Ma, Bin Jiang
It is commonly believed in the literature that smooth curves, such as circles, are not fractal, and only non-smooth curves, such as coastlines, are fractal. However, this paper dem…
How Complex Is a Fractal? Head/tail Breaks and Fractional Hierarchy
Bin Jiang, Ding Ma
A fractal bears a complex structure that is reflected in a scaling hierarchy, indicating that there are far more small things than large ones. This scaling hierarchy can be effecti…
A Socio-geographic Perspective on Human Activities in Social Media
Ding Ma, Mats Sandberg, Bin Jiang
Location-based social media make it possible to understand social and geographic aspects of human activities. However, previous studies have mostly examined these two aspects separ…
Spatial Distribution of City Tweets and Their Densities
Bin Jiang, Ding Ma, Junjun Yin +1
Social media outlets such as Twitter constitute valuable data sources for understanding human activities in the virtual world from a geographic perspective. This paper examines spa…
Characterizing the Heterogeneity of the OpenStreetMap Data and Community
Ding Ma, Mats Sandberg, Bin Jiang
OpenStreetMap (OSM) constitutes an unprecedented, free, geographic information source contributed by millions of individuals, resulting in a database of great volume and heterogene…