Drone content extension

[mojodna]

(This is mostly a placeholder, but I'd like to capture metadata items that are common to drone imagery.)

Imagery captured using drones has some different characteristics than satellite imagery, in part because it is typically produced by stitching together multiple images taken at varying headings, angles, exposures, and times.

• startDateTime - time at which the first item contributing to the image was captured
• endDateTime - time at which the last item contributing to the image was captured
• ...

[matthewhanson]

@mojodna as you and I talked about, start_datetime and end_datetime (no mixing camelcase in!) applies to a lot of data, even the EO profile and maybe deserves being made either optional core fields or it's own extension. Will start new ticket

[threewordphrase]

Does STAC contain an elegant structure to reference several source images that may have been used to generate one single mosaic?

[m-mohr]

Hi @threewordphrase, we are still thinking about mosaics in STAC, see #150

Currently, you can add several derived_from links to the Item, which link to the source imagery.

[m-mohr]

Some related extensions have been proposed:

• https://github.com/linz/stac/tree/master/extensions/aerial-photo
• https://github.com/linz/stac/tree/master/extensions/camera

[PowerChell]

Existing extensions cover this well, closing.