Jutland, Denmark
Ravnsborg Spur
Buried district-heating spur under farmland. Three warm ground signatures above the pipe route.
112
ha
Area covered
58
min
Flight time
3
flagged
Anomalies found
40
°C
Hottest reading
Findings
Ground signature 8 K above background over chamber 6
Two warm patches along the route consistent with insulation failure
Route matches the GIS centreline within 1.2 m
Debrief
Buried heat pipes show as warm stripes on cold mornings. The flight ran at first light in a light frost.
The three signatures were overlaid on the GIS route and sent to the excavation contractor with dig coordinates.
The frost did half the work. The drone just had to be there at sunrise.
Mette Larsen, network engineer
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