</section>
-<section><title>Georef Map Layer Tools</title>
+<section id="georef_tools"><title>Georef Map Layer Tools</title>
<para>
You must have a <xref linkend="GeoRef"/> Map Layer selected to use these tools.
</para>
<para>This allows setting the specific location of GPSBabel.</para>
<para>&appname; will need to be restarted for this setting to take effect.</para>
</section>
+<section><title>Auto Read World Files</title>
+<para>If this is on, when a new image is selected for the GeoRef layer then the associated world file will be read to find the scale and positional properties.</para>
+<para>The associated file is based on filename patterns; e.g. if the image is <filename>filename.jpg</filename> - then the world file may be <filename>filename.jpgw</filename> or <filename>filename.jgw</filename></para>
+</section>
</section>
<section id="prefs_osm" xreflabel="OpenStreetMap Traces Preferences"><title>OpenStreetMap Traces</title>
<listitem>
<para>maps_real_min_shrinkfactor=0.0039062499</para>
</listitem>
+ <listitem>
+ <para>maps_scale_inc_down=4</para>
+ </listitem>
+ <listitem>
+ <para>maps_scale_inc_up=2</para>
+ </listitem>
+ <listitem>
+ <para>maps_scale_smaller_zoom_first=true</para>
+ </listitem>
<listitem>
<para>background_max_threads=10</para>
</listitem>
<para>K = Some text to display at the start of the message - <emphasis>Trkpt</emphasis></para>
<para>A = Altitude of a Trackpoint</para>
<para>S = Speed of a Trackpoint</para>
+ <para>B = Vertical Speed (Climb)</para>
<para>C = Course of a Trackpoint</para>
<para>L = Location of a Trackpoint</para>
<para>T = Time of a Trackpoint</para>