Are Social Media Websites Preserving Your Photo Metadata?
The members of the Controlled Vocabulary forum are attempting to answer the question above (do social media websites or other image sharing services you use preserve your embedded photo metadata after upload?) by conducting a survey of the various services.
When Social Media websites or other online services intentionally or accidentally remove metadata embedded in the images you upload, they are violating the first two principles put forward in the Metadata Manifesto namely; 1) Metadata is essential to identify and track digital images; and 2) Ownership metadata must never be removed.
Any automated system for managing or displaying digital files should honor these principles. At minimum, these systems need to preserve ownership metadata by default and discourage removal of other metadata by warning users about the legal implications of removal.
It seems hard to imagine that simply by uploading an image to one of these websites that all the metadata within a file would disappear. Especially since there is no warning or notification given. However, the preliminary results of this Controlled Vocabulary Survey regarding the Preservation of Photo Metadata by Social Media Websites make it look like the people behind these services have little awareness of the importance of preserving embedded photo metadata.
If you don't find your favorite service in the list of preliminary results, there are instructions on the social media photo metadata preservation survey web page about how to participate. Simply download the testbed file seen above, and upload it to the service you want to survey. Instructions on how to use a simple online tool to view the metadata are given on the page above. You should see sections outlining all of the IPTC, XMP, and Exif metadata fields contained in the image.
However it appears that even the Blogger platform suffers from the same issue this survey hopes to point out. If you investigate you will find that even the image that was resized to 276 pixels wide (and then uploaded to accompany this post) has had all of it's XMP metadata removed!
It looks like you have to upload the image to your own website and then reference that image in your blog post if you are serious about preserving all of your embedded photo metadata.