Skip to main content

Table 1 Quality Groups of Utility Location Data

From: Uncertainty-aware visualization and proximity monitoring in urban excavation: a geospatial augmented reality approach

Quality groups

Data lineage

A

Precise horizontal and vertical location obtained by actual exposure and measurement.

B

Location information obtained through the application of surface geophysical methods

C

Location information obtained by inferring from above-ground utility features.

D

Location information derived from existing records or oral recollections.