Hi Gerd,
> I use MapSource 6.16.3 and it doesn't show the great circle line
> when I open the attached gpx file.
I can't see your attachment.
Mapsoruce draws great circle for direct routes (select "Use Direct
Routes" in Preferences). I have marked waypoints for LAX an JFK and then
created a route form these points. See gpx attached to my post.
In my opinion you should go for a correct solution regardless of speed
penalty. I would prefer reliable program over a fast one. Later you
probably can optimize some computations, where you know for sure, that
error is small.
--
Best regards,
Andrzej
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<gpx xmlns="http://www.topografix.com/GPX/1/1"; creator="MapSource 6.16.3" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd";>
<metadata>
<link href="http://www.garmin.com";>
<text>Garmin International</text>
</link>
<time>2014-08-02T12:41:33Z</time>
<bounds maxlat="40.784420287236571" maxlon="-73.783342838287354" minlat="33.95000696182251" minlon="-118.40000152587891"/>
</metadata>
<wpt lat="34.500010013580322" lon="-116.50001049041748">
<time>2014-08-02T12:41:00Z</time>
<name>D</name>
<cmt>Road</cmt>
<desc>Road</desc>
<sym>Flag, Blue</sym>
<extensions>
<gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
</gpxx:WaypointExtension>
</extensions>
</wpt>
<wpt lat="40.633342266082764" lon="-73.783342838287354">
<time>2014-08-02T12:21:56Z</time>
<name>JFK</name>
<cmt>Droga</cmt>
<desc>Droga</desc>
<sym>Flag, Blue</sym>
<extensions>
<gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
</gpxx:WaypointExtension>
</extensions>
</wpt>
<wpt lat="33.95000696182251" lon="-118.40000152587891">
<time>2014-08-02T12:21:33Z</time>
<name>LAX</name>
<cmt>Droga</cmt>
<desc>Droga</desc>
<sym>Flag, Blue</sym>
<extensions>
<gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
</gpxx:WaypointExtension>
</extensions>
</wpt>
<rte>
<name>LAX1 to JFK</name>
<extensions>
<gpxx:RouteExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:IsAutoNamed>true</gpxx:IsAutoNamed>
<gpxx:DisplayColor>Magenta</gpxx:DisplayColor>
</gpxx:RouteExtension>
</extensions>
<rtept lat="33.95000696182251" lon="-118.40000152587891">
<time>2014-08-02T12:21:33Z</time>
<name>LAX1</name>
<cmt>Droga</cmt>
<desc>Droga</desc>
<sym>Flag, Blue</sym>
<extensions>
<gpxx:RoutePointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:Subclass>004000000000FFFFFFFFFFFFFFFFFFFFFFFF</gpxx:Subclass>
</gpxx:RoutePointExtension>
</extensions>
</rtept>
<rtept lat="40.633342266082764" lon="-73.783342838287354">
<time>2014-08-02T12:21:56Z</time>
<name>JFK</name>
<cmt>Droga</cmt>
<desc>Droga</desc>
<sym>Flag, Blue</sym>
<extensions>
<gpxx:RoutePointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:Subclass>000000000000FFFFFFFFFFFFFFFFFFFFFFFF</gpxx:Subclass>
</gpxx:RoutePointExtension>
</extensions>
</rtept>
</rte>
</gpx>
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