How Accurate is RTK 測量?
Under ideal conditions, an RTK (Real-Time Kinematic) survey is accurate to 1 to 2 centimeters horizontally and 2 to 3 centimeters vertically at a 95% confidence level. If the base station coordinates are wrong or the wrong geodetic datum is used, RTK will simply precisely measure the wrong location by up to several meters.
データと許容値テーブル
The following table outlines the exact parameters and tolerances associated with this scenario to help you gauge the severity of the geodetic error.
| RTK Configuration | Horizontal Accuracy | Vertical Accuracy |
|---|---|---|
| VRS / Network RTK (within 20km) | 1.0 cm + 1 ppm | 2.0 cm + 1 ppm |
| UHF Local Base Station (Optical) | 8 mm + 1 ppm | 15 mm + 1 ppm |
| Float Solution (Lost Fix) | 0.2m - 1.0m | 0.5m - 2.0m |
| Autonomous (No Corrections) | 2.0m - 5.0m | 3.0m - 10.0m |
Geodetic Formula
RTK Accuracy = Base Absolute Accuracy + (Baseline Length ±PPM Error) + Ellipsoid/Geoid Vertical Separation
Official Regulatory Compliance Reference
NGS (National Geodetic Survey) CORS Network Guidelines; RTCM 3.2 correction standards.