Bug 234073 - digikam gpssync no altitude
Summary: digikam gpssync no altitude
Status: RESOLVED NOT A BUG
Alias: None
Product: digikam
Classification: Applications
Component: Geolocation-Correlator (show other bugs)
Version: unspecified
Platform: unspecified Linux
: NOR normal
Target Milestone: ---
Assignee: Digikam Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-04-11 18:21 UTC by Philippe ROUBACH
Modified: 2017-08-18 20:59 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In: 1.3.0
Sentry Crash Report:


Attachments
GPS_20100404_084801.log the nmea file logged with my gps photo tracker (15.50 KB, text/x-log)
2010-04-11 19:15 UTC, Philippe ROUBACH
Details
GPS_20100404_084801.gpx after converting with gebabbel (31.37 KB, text/plain)
2010-04-11 19:16 UTC, Philippe ROUBACH
Details

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Description Philippe ROUBACH 2010-04-11 18:21:14 UTC
Version:           1.2.0 (using 4.4.2 (KDE 4.4.2), Mandriva Linux release 2010.1 (Cooker) for i586)
Compiler:          gcc
OS:                Linux (i686) release 2.6.33.2-desktop-1mnb

launch digikam
selct photos
go to geolocalization/correlator
then
import a gpx track
then
execute
then
all seems ok
but altitude for all photos is set to 0

if i use a tool as geotag all my phot has an altitude

if i use "modify coordinate" altitude is set
Comment 1 Michael G. Hansen 2010-04-11 18:45:55 UTC
Hi Philippe,

sorry, I can not reproduce this problem. Where exactly is the altitude reported as 0?

If you want to, you can send me the GPX file and one photo where the altitude is not saved (mike AT mghansen DOT de, if you do not want to post it here).

Michael
Comment 2 Philippe ROUBACH 2010-04-11 19:15:30 UTC
Created attachment 42693 [details]
GPS_20100404_084801.log the nmea file logged with my gps photo tracker

altitude is 0 as result after correlator did their work
then
i apply correlator results
then
altitude 0 is in the metadata of the photo file
Comment 3 Philippe ROUBACH 2010-04-11 19:16:23 UTC
Created attachment 42694 [details]
GPS_20100404_084801.gpx after converting with gebabbel
Comment 4 Michael G. Hansen 2010-04-11 19:28:30 UTC
Hi Philippe,

thanks for posting the files. I can not see any altitude information in them. The NMEA file contains only GPRMC statements, which do not carry altitude information:

$GPRMC,091631.000,A,4439.5600,N,00110.5346,W,0.04,41.89,040410,,,D*49

Compare it with the documentation here:

http://www.gpsinformation.org/dale/nmea.htm#RMC

So, of course there is no altitude in the GPX files, either. Maybe you have accidentally changed something in your GPS tracker?

Please reopen if you can reproduce this bug with another GPX file which has altitude information. You can check it by opening the file with a text editor like kate, there should be <ele ...> tags in it, like here:

<trkpt lat="14.00" lon="7.00">
        <ele>14.7</ele>
        <time>2009-07-26T14:00:00Z</time>
        <fix>2d</fix>
        <sat>3</sat>
        <sym>Dot</sym>
</trkpt>

Michael
Comment 5 Philippe ROUBACH 2010-04-11 19:53:31 UTC
ok i understand
yes i record minimum data but i can record richer ones but i am not a nmea technician.
what is the name (as GPRMC) of the statements containing altitude ?

in the doc of the Amod AGL3080 there is this :

       LED Status         Output Format       Minimum   Minimum
                                              Records   Operation Hours
Mode 1 Memory Full Led    GGA/GSA/RMC/VTG->1  260,000   72 hours
       ON                 sec
                          GSV -> 5 sec
Mode 2 Memory Full Led    Only RMC->1 sec     1,040,000 288 hours
       Flash
Mode 3 GPS Led ON         GGA/GSA/RMC/VTG->5  260,000   360 hours
                          sec
Mode 4 GPS Led Flash      Only RMC->5 sec     1,040,000 1440 hours
Mode 5 Battery Low Led ON GGA/GSA/RMC/VTG->10 260,000   720 hours
                          sec
Mode 6 Battery Low Led    Only RMC->10 sec    1,040,000 2880 hours
       Flash

i learn everyday :)
Comment 6 Michael G. Hansen 2010-04-11 20:30:19 UTC
I set mine to record RMC and GGA. GGA contains both altitude information as well as the number of satellites and the precision of the position:

http://www.gpsinformation.org/dale/nmea.htm#GGA

I intend to extend the GPSSync in the next major version to look at the precision of the measurement, and mark the images which are not measured precisely (for example, when you just came out of a building) so that you can manually move those images to the right position.

I am glad that we found the problem ;-)

Michael
Comment 7 Philippe ROUBACH 2010-04-11 20:55:15 UTC
thanks i will setup my amod