maemomapper.xml.in

Linux 下电子地图软件

        </listitem>
      </list>
      <heading>POI</heading>
      <para>
        The <display_text>POI</display_text> submenu performs actions
        on the POI nearest to the point on which the tap-and-hold operation
        was performed.  If no POIs are nearby, an error message will be
        displayed.
      </para>
      <list>
        <listitem>
          <display_text>View/Edit</display_text> - View and/or edit the
          selected POI.
        </listitem>
        <listitem>
          <display_text>Show Distance to</display_text> - Display the
          distance (in a straight line) to the selected POI.
        </listitem>
        <listitem>
          <display_text>Download Route to...</display_text> - Open the
          <ref refid="help_maemomapper_downroute"
            refdoc="Download Route"/> dialog with the selected POI's
          location pre-filled as the destination.
        </listitem>
        <listitem>
          <display_text>Add Route Point</display_text> - Add a point to the
          current route, based on the selected POI's location.  The point is
          not a waypoint.
        </listitem>
        <listitem>
          <display_text>Add Waypoint...</display_text> - Add a waypoint
          to the current route, based on the selected location.  You must
          provide a description for the waypoint to be legitimate.  By
          specifying an empty description, however, you can create a break
          in the route.  The break will not be connected to the rest of the
          route, so it can be used to start a new segment.
        </listitem>
      </list>
    </topic>
    <topic>
      <topictitle>Managing Repositories</topictitle>
      <context contextUID="help_maemomapper_repoman"/>
      <para>
        In Maemo Mapper, map data is divided into specific areas called
        <i>repositories</i>.  A repository is a source of map data, each of
        which has its own way of visualizing the Earth.  For example,
        repositories based on street maps typically draw roads as lines and
        buildings as areas, whereas repositories based on satellite data
        draw the Earth as it would appear from space.  There are also
        "hybrid" repositories that overlay street map data on top of
        satellite data, as well as topographical maps that show altitude
        data.
      </para>
      <para>
        Each repository is made up of maps at 16 different zoom levels.
        Zoom Level 0 is the highest resolution (closest to the Earth, i.e.
        "zoomed in"), and Zoom Level 15 is the lowest resolution (furthest
        from the Earth, i.e. "zoomed out").  Not all repositories are
        available at all zoom levels, and some repositories may even produce
        an error (which you can ignore) if you try to download maps at that
        zoom level.
      </para>
      <para>
        Once you have set up at least one repository, you can start
        downloading maps from that repository to your device's file system.
        For details on how to do this, see 
        <ref refid="help_maemomapper_mapman" refdoc="Managing Maps"/>.
      </para>
      <para>
        You can set up any number of repositories in Maemo Mapper, but only
        one can be active at any given time.  The <display_text>Manage
          Repositories</display_text> dialog is accessed via the
        <display_text>Manage Repositories...</display_text> menu item of the
        <display_text>Maps</display_text> menu, and it allows you to add,
        edit, and remove repositories.
      </para>
      <para>
        The <display_text>Manage Repositories...</display_text> has a combo
        box that controls which repository is being viewed and edited.  When
        a repository is selected, the controls below it display the current
        settings, which you can change:
      </para>
      <list>
        <listitem>
          <display_text>URL Format</display_text> - A specially formatted
          string that looks like a URL, but it needs to have at least one
          printf-style substitution strings (like %f or %s).  Normally, you
          must either get these URL formats from the internet
          (www.internettablettalk.com is a good source), or you can use the
          <display_text>Download...</display_text> button in the
          Repositories dialog box to download a sample.
        </listitem>
        <listitem>
          <display_text>Cache Dir.</display_text> - A directory on the file
          system (either on the device's internal memory, or an external
          memory card) in which maps are stored.  Maps are kept here
          indefinitely (until you delete them), so pick a directory with a
          lot of free space.  You can use the
          <display_text>Browse...</display_text> button to select the
          directory with a graphical file system browser, or you can enter
          the directory manually.
        </listitem>
        <listitem>
          <display_text>Download Zoom Steps</display_text> - Controls which
          zoom levels should be avoided when automatically downloading maps
          (i.e. Auto-Download is enabled).  The lowest setting (one bar)
          means to download every zoom level.  The highest setting (four
          bars) causes Maemo Mapper to only download every fourth zoom level
          (0, 4, 8, and 16).
        </listitem>
        <listitem>
          <display_text>View Zoom Steps</display_text> - Similar to the
          above-described <display_text>Download Zoom Steps</display_text>
          option, except that it controls how Maemo Mapper behaves when
          zooming.  For example, at two bars, pressing
          <graphic filename="2686KEY_zoom_in"/> causes Maemo Mapper to zoom
          in two levels instead of just one.  Setting this equal to
          <display_text>Download Zoom Steps</display_text> ensures that you
          see all maps at their native resolution.
        </listitem>
	<listitem>
	  <display_text>Double Pixels</display_text> - This forces Maemo
	  Mapper to avoid using the native resolution of any maps, instead
	  using pixel-doubling.  This is useful if your repository's maps
	  contain small, hard-to-read text, and you want to double the size
	  of the images to make them more readable.  This setting can also
	  affect the zoom levels that are downloaded when Auto-Download is
	  enabled.
	</listitem>
	<listitem>
	  <display_text>Next-able</display_text> - This oddly-named option
	  determines whether or not the "Select Next Repository" action
	  (which can be mapped to any of the hardware keys) will be able to
	  select this repository.  When unset, the "Select Next Repository"
	  action will simply skip over this repository.
	</listitem>
      </list>
      <para>
        In addition to the per-repository controls, there are a few buttons
        that provide additional functionality:
      </para>
      <list>
        <listitem>
          <display_text>Rename...</display_text> - Renames the currently
          selected repository.
        </listitem>
        <listitem>
          <display_text>Delete...</display_text> - Deletes the currently
          selected repository.
        </listitem>
        <listitem>
          <display_text>New...</display_text> - Adds a new repository.
        </listitem>
        <listitem>
          <display_text>Reset...</display_text> - Resets your repository
	  list to the factory default.  This will remove all of your
	  repositories and replace them with the single default repository
	  that comes with Maemo Mapper.
        </listitem>
        <listitem>
          <display_text>Download...</display_text> - Downloads information
          about several preset repositories, and adds them to your
          repository list.  They will be appended to any existing
          repositories you already have.  They are not read-only - you may
          edit them as you wish.  This is a good way to get started.
        </listitem>
      </list>
      <note>
        Certain repositories (most notably, the commercial ones) may
        have license agreements attached with their use.  It may be
        illegal to use a certain repository with Maemo Mapper or under
        certain conditions.  This includes the repositories downloaded
        via the <display_text>Download...</display_text> button.  If you
        are not sure if you are legally allowed to use a particular
        repository, you should delete it from your list of repositories.
        The authors of Maemo Mapper cannot be held responsible for your
        use of a particular repository.
      </note>
    </topic>
    <topic>
      <topictitle>Downloading Routes</topictitle>
      <context contextUID="help_maemomapper_downroute"/>
      <para>
        Route data can be loaded from GPX files, like the ones provided by
        the GPX Driving Directions web service
        (http://www.gnuite.com/cgi-bin/gpx.cgi).  Or, route data can be
        downloaded directly within Maemo Mapper using the
        <display_text>Download Route</display_text> dialog.
      </para>
      <para>
        Downloading routes requires an active connection to the internet,
        but once a route is loaded into Maemo Mapper, the internet
        connection is no longer needed (unless
        <display_text>Auto-Update</display_text> is enabled).  The route
        download functionality in Maemo Mapper actually uses the
        aforementioned GPX Driving Directions web service.
      </para>
      <para>
        The <display_text>Download Route</display_text> dialog contains the
        following controls:
      </para>
      <list>
        <listitem>
          <display_text>Source URL</display_text> - The web service from
          which driving directions are retrieved.  The default is fine, and
          it is usually left unchanged.
        </listitem>
        <listitem>
          <display_text>Auto-Update</display_text> - This option, only
          available if <display_text>Use GPS Location</display_text> is
          enabled, will cause Maemo Mapper to automatically re-download a
          new route if you stray from the route.  Note that you must have a
          continuous connection to the internet (i.e. cellular data service)
          for Auto-Update to work.
        </listitem>
        <listitem>
          <display_text>Use GPS Location</display_text> - If selected, then
          the current GPS location will be used as the
          <display_text>Origin</display_text>.
        </listitem>
        <listitem>
          <display_text>Use End of Route</display_text> - If selected, then
          the end of the route will be used as the
          <display_text>Origin</display_text>.  This is useful for stringing
          together multiple route downloads into a single route.
        </listitem>
        <listitem>
          <display_text>Origin</display_text> - If selected, then you must
          enter your own origin.  An origin can be specified in any format
          understood by Google Maps.  Some examples: "25, -43" (lat/lon),
          "68712" (zip code), "San Francisco, CA", "123 Main St, 45112",
          "5th and Main, 12151".  In fact, if your route download fails with
          a "Could not generate directions" error message, you can use
          Google Maps to test your origin for accuracy.
        </listitem>
        <listitem>
          <display_text>Destination</display_text> - The destination to
          which the directions will lead.  Like the
          <display_text>Origin</display_text>, a destination can be
          specified in any format understood by Google Maps.
        </listitem>
      </list>
    </topic>
    <topic>
      <topictitle>Managing Maps</topictitle>
      <context contextUID="help_maemomapper_mapman"/>
      <para>
        In Maemo Mapper, <i>repositories</i> represent sources of map data,
        and <i>maps</i> are just image files (e.g. PNG or JPEG) that are
        drawn onto the screen.  Once you have a repository set up (see 
        <ref refid="help_maemomapper_repoman"
          refdoc="Managing Repositories"/>), you can download maps from a
        repository into a Map Cache, which is just a directory on your
        device's file system.
      </para>
      <para>
        Maemo Mapper downloads maps from the current repository so that they
        can be drawn onto the screen and later recalled from disk, instead
        of downloading a map every time it is needed.  This is called
        <i>caching</i>, and it allows you to use Maemo Mapper even when you
        are not connected to the internet.
      </para>
      <para>
        Because Maemo Mapper downloads maps to your device's file system,
        you must be aware of how much disk space your maps are taking up,
        especially if you enable Auto-Download.
      </para>
      <para>
        Aside from the Auto-Download functionality, you can also download
        maps manually using the <display_text>Manage Maps...</display_text>
        menu item of the <display_text>Maps</display_text> menu.  The
        <display_text>Manage Maps</display_text> dialog allows you to
        download, overwrite, or delete maps, either by area or along your
        current route.  It contains up to three tabs, all of which control
        which and how many maps are downloaded.
      </para>
      <heading>Setup</heading>
      <para>
        The <display_text>Setup</display_text> tab controls what you what to
        do.  You can download maps (optionally overwriting
        already-downloaded maps) from the current repository to your
        device's file system, or you can delete maps (pertaining to the
        current repository) from your device's file system.  Both of these
        operations can be done either over a rectangular area or along your
        current route.
      </para>
      <list>
        <listitem>
          <display_text>Download Maps</display_text> - If selected, Maemo
          Mapper will download maps from the current repository to your
          device's file system, for the area you specify.  By default, Maemo
          Mapper only downloads the maps that you don't already have.
        </listitem>
        <listitem>
          <display_text>Overwrite</display_text> - If selected, then Maemo
          Mapper will download maps and overwrite any maps that you may have
          already downloaded.
        </listitem>
        <listitem>
          <display_text>Delete Maps</display_text> - If selected, Maemo
          Mapper will delete maps from your file system, for the area you
          specify.
        </listitem>
        <listitem>
          <display_text>By Area</display_text> - If selected, Maemo Mapper
          will download or delete maps for a particular rectangular area of
          the world, based on the latitude and longitude of an upper-left
          and lower-right corner.  See the <display_text>Area</display_text>
          tab to specify the coordinates.