Digital cameras for aerial imagery acquisition

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Spot Image sensor suite provides the latest airborne survey technology to support programmes worldwide.
These sensors have the:

  • ability to capture a seamless strip of digital imagery over large areas rapidly & accurately
  • ability to simultaneously capture red-green-blue & colour infra-red imagery
  • rapid production of accurate terrain & surface elevation models

 
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LiDAR (Light Detection and Ranging) Sensors
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Spot Image operates LiDAR (Leica ALS, Optech) sensors to capture precise height data of buildings & vegetation.

The LiDAR data is used as a base dataset for a variety of projects e.g. environmental impact assessments, pipeline routing, emergency response planning, flood risk assessment, line of sight & radio frequency propagation modelling, overhead power line feature extraction, rail embankment levels, well site locations, civil design and noise modelling.

 
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Oblique Sensor (MIDAS)
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Capture buildings sides as well as roofs.

The Multi-camera Integrated Digital Acquisition System (MIDAS) has been developed by TRACK’AIR and is an airborne, primarily nonvertical,digital photography system.
The MIDAS is capable of continuous, simultaneous acquisition on all 5 cameras (4 tilted and 1 vertical) at maximum interval speed (2.5 seconds) with 1m ground accuracy.

 
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These oblique cameras allow us to capture detail about the building sides as well as the building roof tops.
We are able to use the data be able to measure the position of any point on the oblique image to within plus or minus 1m ground accuracy.

The main roll of this camera is to capture imagery of the cities that have already been flown with high point density LiDAR, the oblique images will then be used to render onto the sides of the buildings modelled from the LiDAR data.

 
Other sensors
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AISA Eagle Hyper spectral instrument
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The sensor captures measurements of reflected light at hundreds of discrete wavelength intervals. The AISA Eagle is a pushbroom sensor collecting all bands simultaneously in a single strip.

Hyperspectral data acquired by the AISA Eagle can be used in a variety of projects:

  • Environmental baseline studies:
    hydrocarbon and other pollutant identification, vegetation stress analysis, quarry dust distribution
  • Land Cover classification: allowing superior, diagnostic discrimination of land cover types over multispectral sensors.
  • Forest Management: Tree species identification, condition and extent
  • Habitat Analysis: Vegetation type and species identification and vegetation stress analysis.
  • Damage assessment and emergency services: damage extent of forest fires, storms, floods and oil spills can be assessed.

 
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Thermal sensors
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Aerial infrared thermal imaging provides valuable data to analyse & monitor:

  • Building heat loss – Building vectors attributed with statistics of thermal data give an indication ofheat loss.
  • Pipeline leak detection – Oil and warm production water will be thermally anomalous
  • Landfill site investigation – Can be used to detect subsurface smouldering and fires
  • Polluted ground water – Warm water runoff from industry and power stations can be mapped
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