# A Person-to-Person and Person-to-Place COVID-19 Contact Tracing System Based on OGC IndoorGML

> Research article (ISPRS International Journal of Geo-Information, 2020) · cited 20× · AI/ML

**Wikidata**: [openalex:W3114499956](https://www.wikidata.org/wiki/openalex:W3114499956)  
**Source**: https://4ort.xyz/entity/a-person-to-person-and-person-to-place-covid-19-contact-tracing-system-based-on-ogc-indoorgml