What is TD? What Opens a TD? File Format List from WhatIs.com

File Extension

TD File Format

Microsoft Train Simulator terrain file

TD is a file extension for a terrain file used with Microsoft Train Simulator. TD files contain quadtree terrain data used by Microsoft Train Simulator. TD files use a quadtree pattern, which divides terrain into four pieces, and divides those pieces into four pieces, and so on, until it reaches a certain size, and stops dividing.

TD files are used by Microsoft Train Simulator, though not directly viewable.


Learn more about .TD files:

Visit the Microsoft Train Simulator web page.

Find out more about Microsoft Windows at ITKnowledgeExchange.com.

This was last updated in September 2010
Editorial Director Margaret Rouse

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