OpenStreetMap
オープンストリートマップ
Collaborative mapping
– Aggregation of web mapping and user content
Neogeography
– Amateur-focused geography
Turn-by-turn navigation
– Feature of GPS navigation devices
Volunteered geographic information
– Type of user-generated content
OpenDroneMap
– open source photogrammetry toolkit
https://en.wikipedia.org/wiki/OpenStreetMap