exif data from the jpg pictures taken by a mini

[sar104]

@sar104 my exif viewer doesn't show a relative altitude field for photos taken with the MM so wasn't aware it recorded that. I presume the relative altitude datafield corresponds with the live altitude readout in the app then?

What are you using to view exif data?

Exiftool. For reference the full dataset looks like this:

File Name : DJI_0303.JPG​

Directory : /Volumes/NO NAME/DCIM/100MEDIA​

File Size : 5.6 MB​

File Modification Date/Time : 2020:05:03 09:52:04-06:00​

File Access Date/Time : 2020:05:18 00:00:00-06:00​

File Inode Change Date/Time : 2020:05:03 09:52:04-06:00​

File Permissions : rwxrwxrwx​

File Type : JPEG​

File Type Extension : jpg​

MIME Type : image/jpeg​

Exif Byte Order : Little-endian (Intel, II)​

Image Description : DCIM\100MEDIA\DJI_0303.JPG​

Camera Model Name : FC7203​

Orientation : Horizontal (normal)​

X Resolution : 72​

Y Resolution : 72​

Resolution Unit : inches​

Software : v02.51.0008​

Modify Date : 2020:05:03 09:52:05​

Y Cb Cr Positioning : Centered​

Exposure Time : 1/13​

F Number : 2.8​

Exposure Program : Program AE​

ISO : 200​

Exif Version : 0230​

Date/Time Original : 2020:05:03 09:52:05​

Create Date : 2020:05:03 09:52:05​

Components Configuration : -, Cr, Cb, Y​

Compressed Bits Per Pixel : 3.58737​

Shutter Speed Value : 1/12​

Aperture Value : 2.8​

Exposure Compensation : 0​

Max Aperture Value : 2.8​

Subject Distance : 0 m​

Metering Mode : Center-weighted average​

Light Source : Daylight​

Flash : No flash function​

Focal Length : 4.5 mm​

Warning : [minor] Possibly incorrect maker notes offsets (fix by 1783?)​

Make : DJI​

Speed X : +0.00​

Speed Y : +0.00​

Speed Z : +0.00​

Pitch : +2.40​

Yaw : +106.80​

Roll : -0.30​

Camera Pitch : -2.60​

Camera Yaw : +1.20​

Camera Roll : +0.00​

Flashpix Version : 0010​

Color Space : sRGB​

Exif Image Width : 4000​

Exif Image Height : 3000​

Interoperability Index : R98 - DCF basic file (sRGB)​

Interoperability Version : 0100​

Exposure Index : undef​

File Source : Digital Camera​

Scene Type : Directly photographed​

Custom Rendered : Normal​

Exposure Mode : Auto​

White Balance : Auto​

Digital Zoom Ratio : undef​

Focal Length In 35mm Format : 24 mm​

Scene Capture Type : Standard​

Gain Control : None​

Contrast : Normal​

Saturation : Normal​

Sharpness : Normal​

Subject Distance Range : Unknown​

Serial Number : 1SFLG9R0AK0ER6​

GPS Version ID : 2.3.0.0​

GPS Latitude Ref : North​

GPS Longitude Ref : East​

GPS Altitude Ref : Above Sea Level​

XP Comment : Type=N, Mode=P, DE=None​

XP Keywords : v02.51.0008;0.0.1;v1.0.0​

Compression : JPEG (old-style)​

Thumbnail Offset : 18432​

Thumbnail Length : 10277​

About : DJI Meta Data​

Format : image/jpg​

Absolute Altitude : +2173.80​

Relative Altitude : +0.00​

Gimbal Roll Degree : +0.00​

Gimbal Yaw Degree : +1.20​

Gimbal Pitch Degree : -2.60​

Flight Roll Degree : -0.30​

Flight Yaw Degree : +106.80​

Flight Pitch Degree : +2.40​

Cam Reverse : 0​

Gimbal Reverse : 0​

Version : 7.0​

Has Settings : False​

Has Crop : False​

Already Applied : False​

MPF Version : 0010​

Number Of Images : 2​

MP Image Flags : Dependent child image​

MP Image Format : JPEG​

MP Image Type : Large Thumbnail (VGA equivalent)​

MP Image Length : 411088​

MP Image Start : 5418100​

Dependent Image 1 Entry Number : 0​

Dependent Image 2 Entry Number : 0​

Image UID List : (Binary data 66 bytes, use -b option to extract)​

Total Frames : 1​

Image Width : 4000​

Image Height : 3000​

Encoding Process : Baseline DCT, Huffman coding​

Bits Per Sample : 8​

Color Components : 3​

Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1)​

Aperture : 2.8​

GPS Altitude : 2173.7 m Above Sea Level​

GPS Latitude : 0 deg 0' 0.00" N​

GPS Longitude : 0 deg 0' 0.00" E​

GPS Position : 0 deg 0' 0.00" N, 0 deg 0' 0.00" E​

Image Size : 4000x3000​

Preview Image : (Binary data 411088 bytes, use -b option to extract)​

Megapixels : 12.0​

Scale Factor To 35 mm Equivalent: 5.3​

Shutter Speed : 1/13​

Thumbnail Image : (Binary data 10277 bytes, use -b option to extract)​

Circle Of Confusion : 0.006 mm​

Field Of View : 73.7 deg​

Focal Length : 4.5 mm (35 mm equivalent: 24.0 mm)​

Hyperfocal Distance : 1.28 m​

Light Value : 5.6​

 

[Ronny St.]

What are you using to view exif data?

I am using Irfan which is free.

 

[Ronny St.]

So if I get it right, neither the app nor the exif is correct concerning altitude? In other words, you will never know what height a picture was taken from...

 

[scro]

It really depends on what you see as the "correct" altitude. If you want the actual altitude above sea level, then no. If you want altitude above takeoff point then the "relative altitude" tag will give you that.

Altitude above sea level is typically of less interest to drone pilots than altitude above local terrain. Drone laws all refer to altitude above ground, rather than sea level and wind speeds usually vary more relative to altitude above ground than altitude above sea level.

 

[scro]

I've been using XNview for image viewing and very basic editing. It seems to get most EXIF data tags but clearly doesn't display all of them. It also gives slightly different names to some of them. There seems to be a wide range of quality in EXIF data viewers and how they display the data, with many "interpreting" the data a bit.

 

[STS-Mavic-Mini]

I am using the built-in viewer from Windows10. It gives focal length, aperture, shuttertime,...and lots more but not coordinates. I will probably have to look for a better EXIF file reader.

In Windows 10, find the file with Explorer. Right click and choose Properties. Then choose Details. All the camera data should be there along with coordinates and altitude.

 

[Ronny St.]

In Windows 10, find the file with Explorer. Right click and choose Properties. Then choose Details. All the camera data should be there along with coordinates and altitude.

Thanks! I did not know I could retrieve them directly in Windows 10, so I learned something new again

 

[scro]

In Windows 10, find the file with Explorer. Right click and choose Properties. Then choose Details. All the camera data should be there along with coordinates and altitude.

It displays a fair bit of the exif info, but not all of it. For example, it doesn't get the altitude above takeoff point (ie relative altitude). Still, there's a load of interesting info there

 

[EyesWideShut]

In Windows 10, find the file with Explorer. Right click and choose Properties. Then choose Details. All the camera data should be there along with coordinates and altitude.

Thanks for that tip. Yes along with GPS longitude and latitude there is a figure for Altitude. Guessing it's above sea level in meters and may not be accurate but may be useful anyways.

 

[STS-Mavic-Mini]

You're welcome. Nice to know you already have the tools in your belt once in awhile.