-
+<para>
+This option specifies the maximum allowable error that may be introduced
+by removing a single point. The value of this option is a distance,
+specified in miles by default. You may also specify the distance in
+kilometers by adding a 'k' to the end of the number.
+</para>
+<para>
+How the error is determined depends on whether the <option>length</option>
+or <option>crosstrack</option> method is used. If you are using the length
+method, the error is the change in the length of the route introduced by
+removing a point. If you are using the crosstrack method, the error is the
+distance from the point to the line that results if that point is removed.
+</para>
-
-
- <para> The Simplify filter is used to simplify routes and
- tracks for use with formats that limit the number of points
- they can contain or just to reduce the complexity of a route.</para>
- <para>The Simplify filter attempts to remove points from each
- route until the number of points or the error is within the given
- bounds, while also attempting to preserve the shape of the original
- route as much as possible. </para>
- <para>You must specify either the "count" option or the "error" option.
- The count option requires a number, which is the maximum number
- of points that will appear in the simplified track. The error
- option takes a distance, optionally followed by an 'm' for miles or
- a 'k' for kilometers. That distance specifies the maximum error;
- how that error is determined depends on the simplification method,
- described next.</para>
- <para>You may also specify the method by which the filter chooses
- which points to remove. The options are "length", which tries to
- remove points that have the smallest effect on the overall length
- of the route, or "crosstrack", which tries to remove points that
- have the smallest overall effect on the shape of the route. The
- default, if you don't specify either option, is "crosstrack". </para>
- <para> The quality of the results will vary depending on the
- density of points in the original route and the length of the
- original route.</para>
- <para> For example, suppose you have a route from Street
- Atlas 2003 that you wish to use with a Magellan GPS receiver
- that only supports up to 50 points in a route:</para>
- <screen format="linespecific">gpsbabel -r -i saroute -f RoadTrip.anr \
- -x simplify,count=50 \
- -o magellan -F grocery.rte
-</screen>
+<para>
+The Simplify filter is used to simplify routes and tracks for use with
+formats that limit the number of points they can contain or just to
+reduce the complexity of a route.
+</para>
+<para>
+The filter attempts to remove points from each route until the number
+of points or the error is within the given bounds, while also attempting
+to preserve the shape of the original route as much as possible.
+</para>
+<para>
+The quality of the results will vary depending on the density of points
+in the original route and the length of the original route.
+</para>
+<para>
+For example, suppose you have a route from Street Atlas 2003 that you
+wish to use with a Magellan GPS receiver that only supports up to 50 points
+in a route:
+</para>
+<screen format="linespecific">gpsbabel -r -i saroute -f RoadTrip.anr -x simplify,count=50 -o magellan -F grocery.rte</screen>
-
-
-
- <para> The Lowrance iFinder GPS series has the unique capability
+<para>
+The Lowrance iFinder GPS series has the unique capability
to output its data to an MMC card. The data is saved to the card as a
.USR file and can be read by your computer using a card reader.
Waypoints, routes, tracks are supported. By default, Event marker
icons are converted to waypoints. Symbols tend to get lost in the
-translation.</para>
- <para> Additional options: ignoreicons - don't convert icons to
-waypoints merge - (USR output) merge all tracks into a single track
-with segments break - (USR input) break track segments into separate
-tracks</para>
+translation.
+</para>
projects / gpsbabel.git / commitdiff