<body>
<h3>Application files
</h3>
This package and its subpackages contain the application files that appear
in the IMG file-system.
<p>The files that will be supported are
</p>
<dl>
<dt>TRE
</dt>
<dd>The tree view of the map that is needed to make sense of
the rest of the file. A map is divided into a number of different levels
of detail. At each level of detail it is divided into a number of areas
(called sub-divisions here. In general there will be more sub-divisions
at the better zoom levels. Each subdivision points to the ones in the
zoom level below it.
</dd>
<dt>RGN
</dt>
<dd>This file contains the definitions of the points, lines and polygons.
They have to be read in conjunction with the
<strong>TRE
</strong> section however,
as they don't make sense by themselves.
</dd>
<dt>LBL
</dt>
<dd>This file contains all the text lables. Other
files refer to the labels that are defined in this file.
</dd>
</dl>
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