The SinoGNSS E300 is a quadcopter mapping drone built around ComNav's K8 RTK/PPK GNSS module, giving centimeter-level photo positioning without ground control points. This C20 kit configuration pairs the airframe with a basic camera payload suited to general topographic, construction, and land-survey mapping, with flight times up to roughly an hour and support for GPS, BeiDou, GLONASS, Galileo, and QZSS. Its payload bay is field-swappable, so the same platform can be upgraded later with other cameras or sensors.