Charles de Jongh_ Field - 机载激光雷达测深 - 优势与挑战.pdf

1、Charles de JonghAirborne Lidar Bathymetry Advantages&Challenges250 employees,12 offices in 5 countries.Headquarters in Oslo,Norway.5 survey aircraft,several helicopter setups&3 mobile mapping systemsState-of-the-art lidar-and camera sensors.In 2023 Field acquired 1 000 000 images and 82.000 km of li

2、dar-dataField(formerly Terratec&Blom)delivers geodata acquisition,analysis and visualization services.Buildings&properties Energy&Utilities Road&RailForest Coastal AgricultureCities Municipalities StateData ProcessingMany ALB use cases:Hydrography&Nautical charting.Coastal zone asset management&plan

3、ning.Marine industry&construction.Hydrological modelling&Flood mapping.Marine biology,e.g.vegetation&habitat mapping.Marine geology,e.g.bottom sediment mapping.OtherProduct CreationInformationKnowledgeData AcquisitionField Airborne Lidar Bathymetry Services:From Data to KnowledgeTypical Product Deli

4、veries:AircraftCessna Grand CaravanTopo-Bathy DEMSeafloor ReflectanceShoreline&elevation contoursRGB Imagery&OrthophotoGNSS/INS Positioning Applanix POS AV610Aerial CameraPhase One IXM-RS 150fBathymetric Lidar SensorTeledyne Optech CZMIL SuperNova Some of the light penetrates the water.The light is

5、dispersed and absorbed before it reaches the bottom.Enlightened bottom areaDirect lightDispersed light The light reaches the water surface and some of it is reflected directly.Some of the light reflects on the water bottom.The bottom type has a big influence on the reflection.WaterBottomAirborne Lid

6、ar Bathymetry what happens?Light photons reflect from the bottom,through the water column and back into the air.The bathymetric lidar sensor in the aircraft detects and counts the reflected light photons and converts this to a digital signal.Airborne Lidar Bathymetry what happens?WaterBottomEnlighte