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Computer Aided Earthmoving Syste

Plant manufacturer Caterpillar's new Computer Aided Earthmoving System (CAES) is being used on a massive remediation project in eastern Germany.

German contractor Wismut is cleaning up disused uranium mines by moving 97Mt of contaminated material and placing it in a vast 160m deep excavation, which will be capped and landscaped.

The GPS system, fitted to a D6RXL bulldozer, is used to profile the site once the contaminated material has been removed.An on-board computer, loaded with a 2D digital terrain model of the site, indicates the machine's position and informs the operator how much material has to be cut or filled.Data transfer is carried out by high-speed radio system developed by Caterpillar and GPS technology firm Trimble Navigation.Several machines can be monitored to give up to date progress of the whole site.

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