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Author Topic: EXIF Tags for GPS accuracy  (Read 9429 times)

ethanjpayne

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EXIF Tags for GPS accuracy
« on: April 22, 2020, 01:18:49 AM »
Hi there,

I'm working on adding all of our image metadata as EXIF tags so that we don't have to import a configuration file with our images.

Does anyone know the EXIF tags that Metashape looks for when loading in GPS accuracy / error values? I'm having a hard time finding these tags online.

Thanks for your help!

Paulo

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Re: EXIF Tags for GPS accuracy
« Reply #1 on: April 22, 2020, 04:03:13 AM »
Under XMP-Camera data section, the following tags would define GPSXYAccuracy (2 cm) and GPSZAccuracy (3 cm) and would be read by Metashape:

Code: [Select]
---- XMP-Camera ----
...
GPSXY Accuracy                  : 0.0208804
GPSZ Accuracy                   : 0.0280351

« Last Edit: April 22, 2020, 04:06:31 AM by Paulo »
Best Regards,
Paul Pelletier,
Surveyor

ethanjpayne

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Re: EXIF Tags for GPS accuracy
« Reply #2 on: April 23, 2020, 12:32:48 AM »
Awesome Paul, thanks for your help! Do you know if attitude accuracy values (roll, pitch, yaw) can also be read in similarly?

Alexey Pasumansky

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Re: EXIF Tags for GPS accuracy
« Reply #3 on: April 23, 2020, 01:06:41 AM »
Hello ethanjpayne,

Are you developing own camera/firmware or are using a standard one?
Best regards,
Alexey Pasumansky,
Agisoft LLC

ethanjpayne

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Re: EXIF Tags for GPS accuracy
« Reply #4 on: April 23, 2020, 08:58:19 PM »
Hey Alexey,

We're using a few cameras for our flight stack, like the Lumenera LT965R and some ICI 9000 series cameras (among others). We're grabbing RAWs from the cameras, then have our own program to convert them to TIF / JPG format, which we then feed into Metashape. We're adding our own EXIF / XMP tags from our payload's GPS / attitude sensors, and we want to include as much data as possible in the image metadata.

We also have some Micasense cameras, which do all of this internally. I've been trying to implement all the metadata tags from their images into our image processing pipeline, but even those images don't include GPS accuracy / attitude accuracy as EXIF / XMP tags. That's why I was curious to see if there's any additional metadata we can include in our tagging process that Metashape might accept to help speed up processing (or prevent the need of importing additional metadata CSV files).

Do you have a list of all the XMP / EXIF tags that Metashape looks for? That would actually be incredibly helpful.

Thanks for your help!

-Ethan
« Last Edit: April 23, 2020, 10:17:51 PM by ethanjpayne »

Alexey Pasumansky

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Re: EXIF Tags for GPS accuracy
« Reply #5 on: April 24, 2020, 01:46:14 AM »
Hello Ethan,

Can you please send a message to support@agisoft.com requesting the XMP/EXIF information, so that I could send the list of supported tags in a reply?
Best regards,
Alexey Pasumansky,
Agisoft LLC

jedfrechette

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Re: EXIF Tags for GPS accuracy
« Reply #6 on: April 24, 2020, 06:02:22 PM »
I'd be interested in this info too. Would it be possible to include in the docs?
Jed