Three important questions in COVID-19 risk evaluation are: “Who was in close contact with the COVID-19 positive person?” and “What places did the COVID-19 positive person visit, and who else visited those places after that?” The first question can be automatically queried using person-to-person contact tracing. The second question addresses the main focus of this paper which is person-to-place contact tracing. If a COVID-19 positive person was in close proximity to a place, those affected locations (geospatial features such as businesses, or public sites, or buses) are considered to be potentially contaminated places. This information is useful for advising people on safety measures, self-quarantine, and for issuing cleaning alerts. As shown in Figure 1, both people and places, as well as duration of contact, play an important role in the pattern for COVID-19 spread.