# Investigation of accuracy of PPP and PPP-AR methods for direct georeferencing in UAV photogrammetry

> Research article (Earth Science Informatics, 2022) · cited 17× · AI/ML

**Wikidata**: [openalex:W4304140252](https://www.wikidata.org/wiki/openalex:W4304140252)  
**Source**: https://4ort.xyz/entity/investigation-of-accuracy-of-ppp-and-ppp-ar-methods-for-direct-georeferencing-in-uav-photogrammetry