Question

Extract GPS data from EXIF

Asked by: fungi8210

Hi,
    I'm developing my application on Windows Mobile platform.
    How do I extract GPS data from EXIF from a jpeg file?

I used the sample code from
http://www.windowsmobiledn.com/print/articles/?&atb.set(c_id)=57&atb.set(a_id)=6211&atb.perform(details)=&

but I was only able to extract data other than data for GPS.
When I try to extract GPS data, it returns blank data.

Anyone know why this is happening?
thanks!

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Asked On
2007-08-28 at 00:38:00ID22790906
Tags

gps

,

extract

,

exif

,

data

,

from

Topics

C++ Programming Language

,

C Programming Language

,

Windows MobileProgramming

Participating Experts
3
Points
500
Comments
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Answers

 

by: jaime_olivaresPosted on 2007-08-28 at 01:05:53ID: 19781117

I have never tried to extract gps data programatically, but have a look to this article about Exif Tools:
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/GPS.html
Where is stated: "...GPS tags are part of the EXIF standard, and are stored in a separate IFD within the EXIF information."

Exif Tools is a library written in Perl, you can review it at:
http://www.sno.phy.queensu.ca/~phil/exiftool/

 

by: jaime_olivaresPosted on 2007-08-28 at 01:10:02ID: 19781136

 

by: fungi8210Posted on 2007-08-28 at 01:38:41ID: 19781246

Hi,
   As I am developing on Windows Mobile platform, so are there libraries that is written in C or C++?
thanks

 

by: jasonclarkePosted on 2007-08-28 at 03:06:41ID: 19781571

There is a C++ library for EXIF here:

http://www.exiv2.org/

 

by: jkrPosted on 2007-08-28 at 08:26:01ID: 19783932

Check out "Image Properties Revealed" at http://www.codeguru.com/cpp/g-m/gdi/gdi/article.php/c3655/

This code (http://www.codeguru.com/code/legacy/gdi/qimageprops.zip) allows you to access the GPS data via

            PropertyTagGpsVer,
            PropertyTagGpsLatitudeRef,
            PropertyTagGpsLatitude,
            PropertyTagGpsLongitudeRef,
            PropertyTagGpsLongitude,
            PropertyTagGpsAltitudeRef,
            PropertyTagGpsAltitude,
            PropertyTagGpsGpsTime,
            PropertyTagGpsGpsSatellites,
            PropertyTagGpsGpsStatus,
            PropertyTagGpsGpsMeasureMode,
            PropertyTagGpsGpsDop,
            PropertyTagGpsSpeedRef,
            PropertyTagGpsSpeed,
            PropertyTagGpsTrackRef,
            PropertyTagGpsTrack,
            PropertyTagGpsImgDirRef,
            PropertyTagGpsImgDir,
            PropertyTagGpsMapDatum,
            PropertyTagGpsDestLatRef,
            PropertyTagGpsDestLat,
            PropertyTagGpsDestLongRef,
            PropertyTagGpsDestLong,
            PropertyTagGpsDestBearRef,
            PropertyTagGpsDestBear,
            PropertyTagGpsDestDistRef,
            PropertyTagGpsDestDist,

 

by: jkrPosted on 2009-09-11 at 13:05:37ID: 25313062

Not sure why you want to delete that. The link I provided contains the source code to extract the data that was sought.

 

by: jaime_olivaresPosted on 2009-09-11 at 13:59:57ID: 25313422

there is a lot of information in this question, I think it should not be deleted.
In worst case you can just close with no refund.

 

by: jkrPosted on 2009-09-12 at 11:18:22ID: 25317360

Would like to add http:#19783932 to the list of possible solutions.

20120131-EE-VQP-002

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