To optimize operations at the train derailment site
The train accident occurred on July 6, 2013, at 1:14 p.m. EST in Lac-Mégantic, a municipality in the Eastern Townships, Quebec, Canada. The derailment of a convoy of 72 runaway tank cars containing light crude oil caused explosions and a fire that destroyed about 40 buildings in a 2 km2 area in the downtown, at the same time killing 47 people. The fire lasted four days, consuming nearly six million litres of oil.
Although all the images were acquired using sensors (on the Pléiades 1A and 1B satellites) with identical characteristics, weather conditions, which varied greatly from day to day, resulted in the same target on the ground appearing a slightly different colour. Therefore, images had to be corrected to reduce or eliminate the atmospheric effects, and we had to not only assure an aesthetically pleasant product but also eliminate interpretation errors that could occur due to the colour differences. Moreover, it was also necessary to fix geometric distortions in the images so that they could be perfectly superimposed.
- Ability to acquire very high-resolution satellite images (50 cm) at a high frequency and based on requirements to monitor developments in this large-scale job
- Quick processing of images using analysis software to facilitate the extraction of useful information.
- Supporting teams in the field and decision makers in order to have an overview of the damage caused in the areas affected and monitor developments in rehabilitation activities.