1. Ron Roth, Product Manager Airborne Topographic LiDAR, Leica Geosystems
Improvements in City Modelling by Fusion of Airborne LiDAR and Oblique Imaging

2. Why city modeling? motivation for Leica RealCity solution
“Managing urban areas has become one of the most important development challenges of the 21st century. Our success or failure in building sustainable cities will be a major factor in the success of the post-2015 UN development agenda.” - John Wilmoth, Director - UN DESA Population Division
Trend toward urban migration – 54% of population in urban areas
Larger, more dynamic cities – 28 mega-cities (>10M population) in 2014  41 in 2030)
Decision support requiring shared, timely, detailed, multi-dimension data to get the most from geospatial information
DMC III Image: Midwest Aerial
Source: World Urbanization Prospects, UN DESAs Population Division, 2014

3. Outputs of city modelling: textured mesh for visualization

4. Outputs of city modelling: CAD models for quantitative analysis

5. Oblique Imaging: flight line layout and camera configuration

6. Leica RealCity – the industry’s first hybrid sensor solution purpose-designed LiDAR, oblique imaging and unified workflow

7. Leica CityMapper hybrid sensor greater speed and accuracy in urban mapping applications
Current technology limited by creation of meshes or point clouds from dense matching of nadir and oblique images
Hybrid LiDAR/Oblique Imaging solution provides:
Better detection of ground in vegetated areas and better differentiation of vegetation from structures
More accurate 3d models…faster
Top image: image-derived point cloud and building model (note misrepresentation of road surface)
Bottom image: LiDAR point cloud and building model

8. Leica CityMapper first hybrid sensor combining LiDAR and oblique imaging
Purpose designed 700 kHz oblique- scanning LiDAR 4-band (RGBN) RCD30 CH82 imager for nadir/ortho images (4) RGB RCD30 CH81m imagers for oblique data collection

9. Project settings Flying height 1326 m AGL
Speed kts (~65 m/s; <111 m/s is frame rate limit)
Scan rate Hz
Pulse rate 516 kHz (5PiA)
Point density 5-8 points/m^2 single pass
Lens configuration 80 mm nadir / 150 mm oblique
Frame interval ~2.8 seconds (1.5 seconds max)
Forward overlap (nadir) 60% (74% actual)
Overlap (side oblique) inner edge
GSD cm

10. Point cloud

11. RGB mesh over point cloud

12. RGB mesh over point cloud

13. Mesh over point cloud

14. HxMap for Leica RealCity workflow for all Leica airborne sensors
Processes imagery from CityMapper LiDAR scanner and nadir/oblique cameras…in a single application
Accelerates data delivery with distributed processing
Creates a wide variety of data products in industry-standard formats and wide variety of projection systems: the SmartBase
Orthophotos / Obliques (RGB, CIR)
Point clouds (with intensity, RGB, CIR)
Meshes / City models

15. Learn more about Leica RealCity
Visit us at HxGN LIVE June 2017 Las Vegas, NV, USA hxgnlive.com/2017

16. Contact us for more Information
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