modern techniques for airborne data acquisition€¦ · oblique images: strategy advantages a...

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