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stac-extensions / perspective-imagery

Describes perspective imagery collected by photogrammetric or non-photogrammetric cameras
Apache License 2.0
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Add a field of view (fov) property #5

Closed PanierAvide closed 2 years ago

PanierAvide commented 2 years ago

Hello,

As we're making use of STAC and its extension in a project to allow hosting of street imagery, we would find interesting to have a property allowing to describe the camera field of view. This would allow us to make a standardized distinction between 360° pictures and classic pictures (useful for a web viewer to have a proper rendering).

If this proposal makes sense to you, I can offer a PR to add this in the extension.

Best regards.

AsgerPetersen commented 2 years ago

Hi @PanierAvide

Thank you for raising this issue!

"Field of view" seems like a good candidate for inclusion in this extension. I guess there are cases where an estimated field of view is the best available information about the camera. Also - together with the perspective_centre and view:azimuth the field of view would give a pretty good idea of the scene. So your PR is very welcome.

I am a little curious about how well 360° would fit with this extension. Could you share how you plan to describe your data?

Best regards Asger

PanierAvide commented 2 years ago

Hi, thanks for your feedback. I will work on the pull request soon.

We already have a working API to offer 360° pictures metadata, here's an example collection and here an example of a single picture. As I'm quite new to the world of STAC schemes, you may have some suggestions about improvements on it was implemented.

Best regards.

heidivanparys commented 2 years ago

@PanierAvide The STAC community seems to be most active on gitter, I would recommend also asking for feedback in https://gitter.im/SpatioTemporal-Asset-Catalog/Lobby.

AsgerPetersen commented 2 years ago

@PanierAvide I am sorry. I have been busy lately. The links seem to be broken now.

PanierAvide commented 2 years ago

Sorry for that, here is a more stable URL for collections : https://geovisio.fr/api/collections/ And for individual pictures : https://geovisio.fr/api/search

AsgerPetersen commented 2 years ago

Thank you. The field_of_view is a very welcome contribution to this spec.

I am no expert in 360 degree images, so I dont know if it is defined as perspective imagery. But it seems to make sense in your use case.