Research topics Click an image to read about my research. Inclusion of Latino businesses in online maps Finding what’s visible from the highway Exploring the blank spots on the map Open source GIS adoption and advocacy in South America How online maps address disputed boundaries and place names Who is mapping Argentina in OpenStreetMap? Visualizing the crowd behind OpenStreetMap Determining local influence in OpenStreetMap through automated language detection Using small cities to learn about crowdsourcing in OpenStreetMap Collaborative mapping of urban food resources in Philadelphia Developing an online course on open source web mapping Visualizing political discourse on Twitter after the 2013 US government shutdown Geographies of student engagement in MOOCs