+ <varlistentry>
+ <term>zoom-min (optional)</term>
+ </varlistentry>
+ <varlistentry>
+ <term>zoom-max (optional)</term>
+ </varlistentry>
+ <varlistentry>
+ <term>lat-min (optional)</term>
+ </varlistentry>
+ <varlistentry>
+ <term>lat-max (optional)</term>
+ </varlistentry>
+ <varlistentry>
+ <term>lon-min (optional)</term>
+ </varlistentry>
+ <varlistentry>
+ <term>lon-max (optional)</term>
+ </varlistentry>