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Modern Techniques for Airborne Data Modern Techniques for Airborne Data AcquisitionAcquisition
Large Format Digital Cameras and Laser Terrain MapperLarge Format Digital Cameras and Laser Terrain MapperDr. Rainer MalmbergDr. Rainer Malmberg
Short Company Introduction Digital Large Format Camera Systems
Analog versus Digital Frame camera versus Line camera Vexcel Ultracam D (samples)
ALTM -Lasersanner Sample project
Combined flight in Paris
Other samples and applications
Consulting&
Integrationcartography
Charting
aerial photography & airborne laser scanning
3D-solutions, analyses and simulations
Photogrammetry& scanning
geomatics
civil engineering surveying
aerial photography
interpretation
GIS-applicationgeoInformatics
AcquisitionProcessingRefining
and Presentation ofGeo data
Services of BSF Luftbild and GeoKomm Network
Analogue Camera, Zeiss LMK Digital camera, Vexcel UCD
Analogue versus digital camera
Analogue Camera, Zeiss LMK Digital camera, Vexcel UCD
Analogue versus digital camera
Analogue camera, Zeiss LMK Digital camera, Vexcel UCD
Analogue versus digital camera
Direct data flow without media change
In field QC possible
Fast processing chain
12 bit radiometry, can be calibrated
Pan, RGB und CIR in a single flight
Advantages of Digital Photo Flights
Line camera Leica ADS40 DLR HRSC-AX JAS 150 Jena Optronik
Frame camera Z/I DMC Vexcel Ultracam D / X
Frame camera ⇔ Line camera
Frame camera versus Line camera
Line cameraFrame camera
Frame camera versus Line camera
Central perspective Parallel perspective long track, central perspective cross track
Flexible stereo angles Fixed Stereo angles
Standard software applicable Special Software required
Pan-sharpening Real RGB
AT recommended No AT applicable
Direct sensor orientation possible
Direct sensor orientation required (INS+GPS)
Flexible exposure times (FMC) Limited exposure times
Synchronized data acquisition in all spectral bands
Color coronas, moving objects cause problems
Low resolution aerial images
High resolution aerial images
High resolution aerial images
Vexcel Ultracam D
Vexcel Ultracam D and additional equipment
Vexcel Ultracam D - ProductsPanchromatic
RGBCIR
Laserscanning
D-GPS: Position of the sensor systems INS (Inertial navigation system): Orientation LIDAR: (light detecting and ranging)
distance measurement
INS
Yaw
Roll
Pitch
Elevation
Latitute
Longitute
D-GPS
Technology
Direct Sensor Orientation
Multiple measurements per pulse
Direct measurements of the visible surface (DSM)
Determination of the Digital Terrain Model (DTM)
Large amount of data to derive further information
LIDAR – Raw data
Powerline mapping
Raw data
Raw point cloud (x,y,z coordinates)
Classification of the raw data
Detecting dangerous situations
Profiles & Results
Combined photo flight projekt Paris 2005
6800 km2,
12500 images, flight height 2000 m, 15 days
GSD raw images 18 cm
GSD DOP 12,5 cm
DTM / DSM grid width 1 m / 2m
Production time 8 month
Paris metropolitan area Digital frame camera (Vexcel UltraCam D)Laserscanner (Optech ALTM 3100)
Products (basic)
Products (secondary)
Products (secondary)
Products (secondary)
Vectors DTM DSM DOP
Products overview
Oblique images: Strategy
Use of a 9 cm ultra wide angle analogue aerial camera Along and cross track at least 70% overlap Features
each object is showed on at least 9 images from 9 different points of view
A systematic area coverage is easy to guarantee
Oblique images: Strategy
Advantages A traditional flight plan and management
is usable For orientation purposes traditional approaches,
can be used: Software and experienced people are available
Less images are required, less effort for image orientation and data extraction is necessary
The high resolution of analogue aerial film delivers high quality images
high economic efficiency
Oblique images
Oblique images
Application: 3D visualization
Application : 2D planing – land register
Application: 2D sealed areas
Map facturing
Application: Planing
location for antennas -
infrastructure planning
A member of GEOkomm Networks
Thank you for your attention