15 Minutes in the Sky:

A new, fast, low cost approach to full 3D surveying.

Jonathan Byrne

Urban Modelling Group (UMG)

University College Dublin

Ireland

Urban Modelling Group



link

Structural Analysis

Wind Tunnel Modelling

UAV Scanning:

  • Low cost
  • Easily capture multiple angles
  • Real-time feedback
  • Centimetre accurate models
  • Spatial image database
  • Limited range
  • Limited battery life
  • Legal restrictions

Traditional Photogrammetry

The Problem with Perspective and Parallax

Structure From Motion



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Bundler Files

Vertical vs Oblique (Angled)

Vertical vs Oblique (Angled)



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Ballycorus Lead Mines



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Mesh with Texture

Mesh without Texture

Scanning Archaeological Sites: Castleroche



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Area: 0.01 km², 2.99 acres, 1.21 hectares

Mesh with Texture

Mesh without Texture

Boland's Mills:


link

Area: 0.01 km², 2.52 acres, 1 hectare

Accuracy

UCD: Urban Large Area Survey



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Area: 1.1 km², 271.82 acres, 110 hectares

Vertical

2.2 Hectares

30 Degree Oblique

4.6 Hectares

40 Degree Oblique

10 Hectares

Vertical

2.2 Hectares

30 Degree Oblique

4.6 Hectares

60 Degree Oblique

10 Hectares

Connolly's Folly and Kilmacredock Survey

Area: 3.03 km², 749.79 acres, 303.43 hectares

3D Model



link

Area: 3.03 km², 749.79 acres, 303.43 hectares

Accuracy:

  • Model accuracy at 100 meters: 5 centimeters (GSD)
  • Model accuracy at 50 meters: 2 centimeters (GSD)
  • Georeference accuracy with GPS: approx 1-5 meter
  • Georeference accuracy with RTK: approx 2-4 cm

Future Work:

  • Improvements in Structure From Motion algorithm
  • Simultaneous Localisation and Mapping
  • Flight path planning
  • Coordinated UAV scanning
  • Visualisation over the internet link

Other surveys:

  • Bandon, Co. Cork
  • Trim Castle
  • Newtown Abbey, Trim
  • UCD Campus
  • Slane, co Meath

Thanks

umg.ucd.ie

3dsurveyingservices.ie