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+--- Thread: Save some space... (/thread-467.html)
Save some space... - RsH - 09.09.2009
Below you can see the first 4 positions from a file that I have out of my I-gotU GT-120, and as it was output by Route Converter 1.29.17, where Route Converter changed the speed to M/S from Km/H.
Please save me some hard drive space and cut down the speed from the 15 decimal places to a shorter number of places, as even 4 decimal places in terms of m/s comes down to a mm/s accuracy. You can also round the elevation down to 2 or 3 decimal places, since the best a GPS will do is be accurate to the nearest meter or two of elevation. In a larger file, that will save quite a few kilobytes of space per GPX file. Mobile Action's numbers are inherently suggestive of a degree of accuracy that we know is NOT there.
FWIW
RsH
--------------------------------------------
Before Route Converter
--------------------------------------------
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<gpx creator="Mobile Action http://www.mobileaction.com/" version="1.0" xmlns="http://www.topografix.com/GPX/1/0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd">
<trk>
<name>2009 09 05 133136_1</name>
<desc>Color:004000ff</desc>
<trkseg>
<trkpt lat="43.767593" lon="-79.415749">
<ele>180.029999</ele>
<time>2009-09-05T17:31:36Z</time>
<speed>13.72</speed>
</trkpt>
<trkpt lat="43.767609" lon="-79.415672">
<ele>178.629990</ele>
<time>2009-09-05T17:31:38Z</time>
<speed>15.26</speed>
</trkpt>
<trkpt lat="43.767620" lon="-79.415550">
<ele>177.979996</ele>
<time>2009-09-05T17:31:40Z</time>
<speed>19.76</speed>
</trkpt>
<trkpt lat="43.767643" lon="-79.415405">
<ele>178.139999</ele>
<time>2009-09-05T17:31:42Z</time>
<speed>22.50</speed>
</trkpt>
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After Route Converter 1.29.17
---------------------------------------------------
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<gpx xmlns="http://www.topografix.com/GPX/1/0" version="1.0" creator="Generated by Christian Pesch's RouteConverter. See http://www.routeconverter.de">
<trk>
<name>2009 09 05 130000_1</name>
<desc>Color:004000ff</desc>
<trkseg>
<trkpt lon="-79.415749" lat="43.767593">
<ele>180.029999</ele>
<time>2009-09-05T17:31:36.000Z</time>
<speed>3.811111111111111</speed>
<name>Position 1</name>
</trkpt>
<trkpt lon="-79.415672" lat="43.767609">
<ele>178.62999</ele>
<time>2009-09-05T17:31:38.000Z</time>
<speed>4.238888888888889</speed>
<name>Position 2</name>
</trkpt>
<trkpt lon="-79.41555" lat="43.76762">
<ele>177.979996</ele>
<time>2009-09-05T17:31:40.000Z</time>
<speed>5.488888888888889</speed>
<name>Position 3</name>
</trkpt>
<trkpt lon="-79.415405" lat="43.767643">
<ele>178.139999</ele>
<time>2009-09-05T17:31:42.000Z</time>
<speed>6.25</speed>
<name>Position 4</name>
----------------------------------------------------
RE: Save some space... - routeconverter - 10.09.2009
(09.09.2009, 23:08)RsH Wrote: Please save me some hard drive space and cut down the speed from the 15 decimal places to a shorter number of places, as even 4 decimal places in terms of m/s comes down to a mm/s accuracy. You can also round the elevation down to 2 or 3 decimal places, since the best a GPS will do is be accurate to the nearest meter or two of elevation.
Hi Bob,
to save hard drive space, set the following registry entry to true
[HKEY_CURRENT_USER\Software\JavaSoft\Prefs\slash\navigation\util]
"reduce/Decimal/Places/To/Reasonable/Precision"="true"