Detailed Survey Tolerances
RDM 1.1 Table 5.2 field tolerance display for detailed topographic survey pickup.
RDM 1.1 (2025) Table 5.2 | Structures, pavements, and general topographic detail
Tolerance Schedule
| Feature Class | XY Tolerance | Z Tolerance | Field Application |
|---|---|---|---|
| Structures, buildings, paved roads | +/-0.025 m | +/-0.015 m | Building corners, kerbs, paved carriageway edges, drainage structures |
| Gravel pavements | +/-0.050 m | +/-0.025 m | Gravel shoulders, unpaved access roads, compacted formation surfaces |
| All other areas | +/-0.100 m | +/-0.050 m | Open ground, vegetation breaks, general topographic spot levels |