Speed is reported to be 0.0

[lianergoist]

Hello

I have two problems.

1 - I log to gpx file every 60 seconds. Sometimes there are "holes" where speed is reported to be 0.0, but I know for sure I was moving. The position is also saved correct, but I noticed a pattern. All the trkpt with speed 0.0 is missing the course info.

Can I do something to fix it?

<trkpt lat="55.85398291" lon="9.97856142"><ele>40.309326171875</ele><time>2025-09-24T08:26:08.000Z</time><course>97.7</course><speed>1.05</speed><src>gps</src></trkpt>
<trkpt lat="55.85385636" lon="9.97976122"><ele>40.107421875</ele><time>2025-09-24T08:27:08.000Z</time><course>98.7</course><speed>1.14</speed><src>gps</src></trkpt>
<trkpt lat="55.85372414" lon="9.98082671"><ele>34.4378662109375</ele><time>2025-09-24T08:28:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85360725" lon="9.98196302"><ele>41.92041015625</ele><time>2025-09-24T08:29:08.000Z</time><course>108.7</course><speed>1.22</speed><src>gps</src></trkpt>
<trkpt lat="55.85348499" lon="9.98304199"><ele>39.79888916015625</ele><time>2025-09-24T08:30:08.000Z</time><course>87.6</course><speed>1.13</speed><src>gps</src></trkpt>

and here, 6 minutes with 0.0 ...

<trkpt lat="55.85243533" lon="9.99164971"><ele>39.322509765625</ele><time>2025-09-24T08:38:08.000Z</time><course>113.9</course><speed>1.12</speed><src>gps</src></trkpt>
<trkpt lat="55.8523096" lon="9.99275072"><ele>40.1890869140625</ele><time>2025-09-24T08:39:08.000Z</time><course>88.4</course><speed>1.23</speed><src>gps</src></trkpt>
<trkpt lat="55.85227969" lon="9.99364162"><ele>43.45819091796875</ele><time>2025-09-24T08:40:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85219995" lon="9.9945626"><ele>44.960693359375</ele><time>2025-09-24T08:41:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85202773" lon="9.99547915"><ele>41.96240234375</ele><time>2025-09-24T08:42:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.8519362" lon="9.99639931"><ele>40.19921875</ele><time>2025-09-24T08:43:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85183005" lon="9.99775832"><ele>41.53997802734375</ele><time>2025-09-24T08:44:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85173601" lon="9.99851406"><ele>39.0382080078125</ele><time>2025-09-24T08:45:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85154763" lon="9.99977486"><ele>42.53582763671875</ele><time>2025-09-24T08:46:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85142412" lon="10.00080405"><ele>40.992919921875</ele><time>2025-09-24T08:47:08.000Z</time><course>106.7</course><speed>1.25</speed><src>gps</src></trkpt>
<trkpt lat="55.85128919" lon="10.00193318"><ele>41.59033203125</ele><time>2025-09-24T08:48:08.000Z</time><course>112.2</course><speed>1.21</speed><src>gps</src></trkpt>
<trkpt lat="55.85120012" lon="10.00287696"><ele>41.867431640625</ele><time>2025-09-24T08:49:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.85112799" lon="10.00408738"><ele>41.3519287109375</ele><time>2025-09-24T08:50:08.000Z</time><course>101.8</course><speed>1.18</speed><src>gps</src></trkpt>
<trkpt lat="55.85102153" lon="10.0052494"><ele>39.2786865234375</ele><time>2025-09-24T08:51:08.000Z</time><course>88.1</course><speed>1.22</speed><src>gps</src></trkpt>

2. • When I DO take a break, and is not moving, GPSLogger still writes trkpt to the file. I have told GPSLogger to discard points if distance to previous point is less than 30 meters - but that doesn't work! The distance between points is only a meter or two.

<trkpt lat="55.82299438" lon="10.05021909"><ele>39.38909912109375</ele><time>2025-09-24T09:48:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82299426" lon="10.05022047"><ele>39.21234130859375</ele><time>2025-09-24T09:49:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82299437" lon="10.05022218"><ele>39.09912109375</ele><time>2025-09-24T09:50:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82299473" lon="10.05022416"><ele>39.022705078125</ele><time>2025-09-24T09:51:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82299512" lon="10.05022616"><ele>38.9608154296875</ele><time>2025-09-24T09:52:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82299528" lon="10.0502273"><ele>38.9029541015625</ele><time>2025-09-24T09:53:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82299531" lon="10.05022875"><ele>38.80963134765625</ele><time>2025-09-24T09:54:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301378" lon="10.05027335"><ele>37.3720703125</ele><time>2025-09-24T09:55:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301258" lon="10.05027386"><ele>37.41241455078125</ele><time>2025-09-24T09:56:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301212" lon="10.05027369"><ele>37.3807373046875</ele><time>2025-09-24T09:57:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.8230118" lon="10.05027323"><ele>37.3577880859375</ele><time>2025-09-24T09:58:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301165" lon="10.05027309"><ele>37.3463134765625</ele><time>2025-09-24T09:59:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.8230114" lon="10.05027269"><ele>37.3975830078125</ele><time>2025-09-24T10:00:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301114" lon="10.05027237"><ele>37.46490478515625</ele><time>2025-09-24T10:01:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301075" lon="10.0502721"><ele>37.54083251953125</ele><time>2025-09-24T10:02:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82301023" lon="10.05027206"><ele>37.62359619140625</ele><time>2025-09-24T10:03:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82300997" lon="10.05027213"><ele>37.68902587890625</ele><time>2025-09-24T10:04:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82300989" lon="10.05027198"><ele>37.71807861328125</ele><time>2025-09-24T10:05:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82300977" lon="10.05027187"><ele>37.736083984375</ele><time>2025-09-24T10:06:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>
<trkpt lat="55.82300997" lon="10.05027156"><ele>37.768310546875</ele><time>2025-09-24T10:07:08.000Z</time><speed>0.0</speed><src>gps</src></trkpt>

I hope someone can help me. I am happy to make a log file next time, if that will help.

[lianergoist]

Maybe isue 1 is related to 1137?

[mendhak]

That's an interesting observation and yeah possibly they might be related. In the app's code, I'm only writing out whatever the OS is reporting. You can even see there's a check to see if "has speed" is true before writing it:

gpslogger/gpslogger/src/main/java/com/mendhak/gpslogger/loggers/gpx/Gpx10FileLogger.java

Lines 358 to 360 in e9a0445

	if (loc.hasSpeed()) {
	track.append("<speed>").append(String.valueOf(loc.getSpeed())).append("</speed>");
	}

so it's doubly annoying since the OS says, yes I have a speed, here it is, nothing (which could be valid!)

For your second part - where you have set a distance filter, yes it definitely should be discarding. You can try a debug log, and in there you should see (when it works) statements that say that it's discarding the point since not enough distance has been covered.