potential business benefits of oblique cameras ... - eurosdr
TRANSCRIPT
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Potential business benefits of oblique cameras for an NMCA
R E M O T E S E N S I N G S E R V I C E S
EuroSDR WorkshopOblique Aerial Cameras
Sensors and data processing
Paul MarshallOrdnance Survey GB
Monday 9th October 2017
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Aims of the talk
The use of Remote Sensing at Ordnance Survey
Current Oblique Camera Technology investigations
Future Business requirements
Potential Business Benefits to an NMCA
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© Ordnance Survey 2017
Who we are
• National Mapping Agency of Great Britain.
• 250,000 km sq.
• Providing accurate and up-to-date geographic data, relied on by government, business and individuals.
• Some key producs
• OS MasterMap® • Topography Products
• Green Space
• Highways
• Water Networks
• Imagery
• Integrated Transport Network
• Height Products
• OS Terrain 5 (DTM)
• Building Height Attributes
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The use of Remote Sensing at Ordnance Survey
© Ordnance Survey 2017 |
Topography
Imagery Layer
OS Terrain 5 (DTM)
BuildingHeight Attributes
Green Space
Highways
Water Networks
Integrated TransportNetwork
Products updated using Remote Sensing
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The use of Remote Sensing at Ordnance Survey
© Ordnance Survey 2017 |
OS Flying UnitBased at East Midlands2 x Cessna 404Vexcel Imaging UltraCam XP’sNadir cameras
Typical flight diagram(15cm GSD80/30% overlap)
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Urban geospatial database mapping
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Current Oblique Camera Technology Investigations
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2015 investigations
© Ordnance Survey 2017
Leica RCD30 Penta Oblique camera trial – 2015
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3D Building Modelling visualization
Classified Point Cloud
Digital Surface Models (DSM’s)
Building Classification
Building Modellinge.g. Leica 3D Modeller
© Ordnance Survey 2017
2015 investigations - findings
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2017
Future Business Requirements
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EuroSDR E-Learning
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Update for 2017
3D Building Modelling
Smart Cities mappinguser case; –Geospatial requirement for 5G Telecommunications Planning
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3D Building Visualisation & City Model texturingConsumer v GIS customers
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Oblique Ortho-imagery
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Smart CitiesUser Case; Geospatial data for 5G Telecom Planning
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Smart Cities
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High definition geospatial data for 5G Telecommunication planning.
• Field Survey
• Mobile Mapping
• UAV
• Airborne Oblique camera systems
• Airborne Vertical camera systems
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Field surveying
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© Ordnance Survey 2017 | Confidential Mobile Mapping data
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UAVUnmanned Aerial Vehicle
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Mobile Mapping
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Vertical aerial imagery
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Fused Mobile Mapping & Vertical imagery
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Leica Penta Oblique
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Mobile mapping
Oblique imagery
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Feature Extraction
Using either:-
a) Dense 3D Point Cloud
b) Oblique and Nadir Stereo imagery
Point cloud & imagery courtesy of IGI-Systems
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Potential Business Benefits to an NMCA
Investigations show a good business potential when using Oblique data for Feature Extraction for high-definition mapping.
Potential to measure building facades (using stereo imagery)
Automation of 3D City Modelling (3D Textured TIN models or 3D MESH) – helps towards creating the ‘Digital Twin’; Digital Built Britain, BIM/3D GI initiative.
Probably needs more than one use for full business realisation.
© Ordnance Survey 2017
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Conclusion
Oblique has advantages in:-
• Total coverage of City areas with minimal occlusions
• Multiple views of each feature
• See under features
• 3D Colourised 3D City Model automatically created
• Efficiency of data capture and processing
• Stereo Oblique capability
• Etc.
GSD very important (needs to be under 8cm in Nadir imagery for HD Mapping Feature Extraction)
Flying heights – an issue over dense urban areas
% overlap important, to avoid occlusions whilst being efficiently flown
© Ordnance Survey 2017
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Paul MarshallLead ConsultantRemote Sensing ServicesOrdnance Survey (GB) [email protected]