Page 1 of 1

KML export of GPS data fails

PostPosted: Sun Sep 13, 2015 8:05 am
by aBUGSworstnightmare
Hey guys,

wanted to export my flight path (GPS data from LOG) to a .KML file for visualizing via Google earth, but the export fails completely on Windows version, MAC version generates an empty file only.

What am I doing wrong?
kml export fails.JPG

Re: KML export of GPS data fails

PostPosted: Sun Sep 13, 2015 12:45 pm
by LPR
Joerg

The newest QGC works fine for me but if your using an older QGC some of them will not export KMLs. Some SD cards give problems with errors and that could also be your problem.

Larry

Re: KML export of GPS data fails

PostPosted: Sun Sep 13, 2015 7:50 pm
by Max
Joerg, logDump.exe was missing from earlier releases of 1.6.x. You could download the latest QGC package again (1.6.3.1), and/or use the standalone log exporter.

-Max

Re: KML export of GPS data fails

PostPosted: Mon Sep 14, 2015 6:42 am
by aBUGSworstnightmare
Hi Max,
thanks for the hint; still used 1.6.3 :oops:
export.JPG

O.K. this solved the problem with the exporter but I still have not data in my .xml-file. Looks like no GPS related data gets logged with this FW (it's Peter's FW that I'm currently flying).
The log file in question is here https://www.dropbox.com/s/huz4g52rh7h4w ... L.LOG?dl=0
Would be great if someone can check what's going on.

Re: KML export of GPS data fails

PostPosted: Mon Sep 14, 2015 7:09 am
by Max
You have GPS H/V accuracy filters set to .5m but your logged accuracy never drops that low. Set them to 3m or so, then try the export again.

-Max

Re: KML export of GPS data fails

PostPosted: Mon Sep 14, 2015 8:13 am
by aBUGSworstnightmare
Max wrote:You have GPS H/V accuracy filters set to .5m but your logged accuracy never drops that low. Set them to 3m or so, then try the export again.

-Max


Will try later; did not expect that this is a filter condition.

Re: KML export of GPS data fails

PostPosted: Mon Sep 14, 2015 9:34 am
by aBUGSworstnightmare
Case closed! Set the accuracy to ~4m to get some data:
Capture.JPG
RCTSpider on 'rollercoaster' ride

Re: KML export of GPS data fails

PostPosted: Mon Sep 14, 2015 7:24 pm
by aBUGSworstnightmare
Hey guys,
is it possible that the exported log is not scaled correctly?
Here is the video from one of my CamCruiser's flights

and this is the exported track from the log file (https://www.dropbox.com/s/al1v43n3fb4c0 ... L.LOG?dl=0):
tracktosmall.JPG
This looks like it is too small since I used more 'space' for flying; i.e. at 3:31min when the craft is ascending in front of the trees

088-AQL.zip
.KML file for use in Google Earth i.e.
(271.77 KiB) Downloaded 273 times


Can you let me have your feedback on this? Will capture a 'flight' by carrying an M4 around the streets to see if it fits google map this week...

Re: KML export of GPS data fails

PostPosted: Tue Sep 15, 2015 1:34 am
by Max
Joerg, I can guarantee you that what you see on the map is exactly what was in the logs. There is no "scaling" since everything is logged in real-world coordinates (lat/lon/MSL alt). If you're missing records, that is most likely due to filtering being applied to the log export and/or poor GPS reception during parts of the flight.

-Max

Re: KML export of GPS data fails

PostPosted: Tue Sep 15, 2015 11:06 am
by aBUGSworstnightmare
Max wrote:Joerg, I can guarantee you that what you see on the map is exactly what was in the logs. There is no "scaling" since everything is logged in real-world coordinates (lat/lon/MSL alt). If you're missing records, that is most likely due to filtering being applied to the log export and/or poor GPS reception during parts of the flight.

-Max


Max, Im not missing records. O.K. my eyes are not that young anymore but I'm pretty sure I was not flying that Close to my Position.
result.JPG

I will check this when I'm back there with another FW (using Peter's FW atm) and will take some Pictures to Display craft positions (geo tagging).