千寻知寸 FindCM

Surveyors, drone and machine operators and device makers need centimetre-level positions in real time, which normally means setting up and maintaining their own RTK base stations. 千寻知寸 FindCM, from Qianxun Spatial Intelligence, is a subscription correction service that removes that step: a GNSS receiver or a device running the Qianxun SDK connects over the internet and receives correction data, with stated accuracy of 2 cm horizontal and 5 cm vertical.

How it works. FindCM draws on China's national BeiDou ground-based augmentation network, satellite-based augmentation and Qianxun's global reference-station network, combined with Qianxun's own positioning algorithms and cloud platform. It processes observations from five satellite navigation systems: BeiDou (including BeiDou-3), GPS, GLONASS, Galileo and QZSS (the 5-constellation, 16-frequency tier). Corrections are streamed over NTRIP (RTCM) or through SDKs for Android, iOS, Linux and embedded devices. A web Open API lets server-side systems bind and manage device accounts. Coverage spans 33 provincial-level regions of China. The FindCM Private Service edition (Ultimate, Lite and Hybrid) is a platform that customers deploy themselves, offering RTK and PPP-RTK/PPP-AR.

• Accounts: sold online by the day, month or year
• Availability: stated above 99.9%, with 24/7 operations
• Uses: surveying and mapping, autonomous driving, precision agriculture, power-line drone inspection, city management and consumer devices

Guangdong Power Grid reports 900 inspection drones connected to FindCM. FindCM was among the first data products listed on the Shanghai Data Exchange.