+ There are four different kinds of maps you can view; you can
+ select which to download by selecting as many as you like from
+ the available types:
+ <variablelist>
+ <varlistentry>
+ <term>Hybrid</term>
+ <listitem>
+ <para>
+ A combination of satellite imagery and road data. This
+ is the default view.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Satellite</term>
+ <listitem>
+ <para>
+ Just the satellite imagery without any annotation.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Roadmap</term>
+ <listitem>
+ <para>
+ Roads, political boundaries and a few geographic features.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Terrain</term>
+ <listitem>
+ <para>
+ Contour intervals and shading that show hills and
+ valleys.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </para>
+ <para>
+ You can specify the range of zoom levels to download; smaller
+ numbers show more area with less resolution. The default
+ level, 0, shows about 3m/pixel. One zoom level change
+ doubles or halves that number.
+ </para>
+ <para>
+ The Tile Radius value sets how large an area around the center
+ point to download. Each tile is 512x512 pixels, and the
+ 'radius' value specifies how many tiles away from the center
+ will be downloaded. Specify a radius of 0 and you get only the
+ center tile. A radius of 1 loads a 3x3 grid, centered on the
+ specified location.