SAPOS, reference frames and deployment in Germany

Service performance is not a system guarantee

AdV states 1–2 cm horizontal and 2–3 cm vertical for HEPS. These are correction-service figures, not a guarantee for our UAV, camera output or every location. Agree conditions, statistical definition and test method before acceptance.

Access and cost

The ZSS website lists nationwide HEPS at EUR 10 per credential per month and EUR 100 one-off registration administration. A credential is not for concurrent use on multiple devices. The Bavaria FAQ lists free service use with EUR 20 annual account administration. These are different offerings; verify region, concurrent connections, licence and current tariff for each project.

Name coordinates completely

Agree datum, realisation, epoch, projection/zone, units and height type. The Bavaria FAQ identifies ETRS89/DREF91 (R2025), DHHN2016 and GCG2016. Ellipsoidal height h and normal height H differ: H = h − ζ using the applicable quasigeoid model. A UTM zone conversion is not a datum transformation. Do not transfer state-specific settings without verification.

Approve operations separately

RTK does not remove operational rules. EASA distinguishes open, specific and certified by operational risk. The operator must verify the category, national geographical zones and required permissions for the actual flight. This website grants no operational approval.

Relevant next steps