Rob Wooding & Associates

Aerial Survey Consultants

Multi Spectral

The multispectral camera system is the primary source of information regarding crop health, stress, plant vigor, chlorophyl content as well as disease and pest damage.  Using carefully chosen narrow band filters that are matched to the particular requirement, it produces results that are generally 30% more precise than the wide band filters found on satellite and RGB cameras.

Due to it's adaptability, a wide variety of false color images that highlight and pin point vegetation problems can be generated for the farmer or environmentalist.  Not just the common NDVI but also SIPI, WBI, NIR/G, LCI and many others. 

Mostly flown with a 50cm to 1m resolution, all multispectral images are provided with basic geo-referencing which allows an agronomist or farmer to map out problem areas on his computer and then get to them quickly on the ground using any handheld GPS or Smartphone

Resolutions and precision are typically ten to fifteen times better than satellite imagery for a competitive cost per hectare.

The examples on the left show some of the possible results illustrating how differing areas of crop health or stress can be isolated with various indices.

The thermal camera detects temperature using a UFPA VOX microbolometer.  It is capable of detecting temperature differences as subtle as 0.04 of a degree centigrade.

Thermal imagery cannot be obtained from satellite data.

Although thermal imagery can be used for such things as detecting rocky areas under unprepared land and frost vulnerability in orchards, the primary use for this imagery relates to water issues.  Dry ground is warmer than wet ground so drainage problems, over or under irrigation as well as leaking canals and pipes, are all clearly discernable.  

One of the images on the left show a less than optimal centre pivot spray pattern and segments of under irrigation. Another image shows water temperatures in a dam such that the original under water topography is apparent.  Another image shows hot spots in a coal mining area.  The last example shows high fire risk areas in a timber plantation.

Generally thermal imagery is flown at 1 to 2 meter resolution.