EarthQA: A Question Answering Engine for Earth Observation Data Archives *

Dharmen Punjani, Manolis Koubarakis, Eleni Tsalapati

Abstract: EarthQA is a question answering engine that accepts questions in natural language (English) that ask for satellite images satisfying certain criteria and returns links to such datasets, that can be then downloaded from the CREODIAS cloud platform. The questions can refer to image metadata (e.g., satellite platform, sensing period, cloud cover etc.) but also to entities from the knowledge graph DB-pedia (e.g., Mount Etna or the city of Munich). In this way, the users can ask questions like "Give me Sentinel-2 satellite images that show Mount Etna, have been taken in February 2021 and have cloud cover less than 10%."