What is current status of UDM2?

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Permanently deleted user

• April 26, 2019 08:36

I read this article of new Usable Data Masks:

https://www.planet.com/pulse/planets-new-usable-data-masks/

I tried Search API for assets of a PlanetScope item on April 1, 2019 but I cannot find udm2 or basic_udm2 asset within asset list.

Does anybody where or when we have udm2 data?

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• Official comment

  

  Benjamin Trigona-Harany

  • April 26, 2019 15:11

  Hi, it's now available for Open California users in our APIs (not yet in Planet Explorer).

  You can read about how to use it in the technical blog post Finding the Usable Data in Planet Imagery and in our documentation.

  Best, Ben

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  Permanently deleted user

  • May 04, 2019 08:11

  Thanks for your help.

  I understand now.

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  bas altena

  • May 21, 2019 08:00

  Dear,

  I have two questions concerning this issue.

  - Looking into the documentation it seems only the basic-level product has a UDM2 layer, is this correct?

  - I was wondering what algorithm is behind the cloud cover, as I am working in snowcovered areas, cloud detection is not trivial and knowing what procedure is behind helps in what level of confidence I can put on this meta data.

  Thanks in advance, Bas

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  Pooja Pandey

  • May 21, 2019 08:10

  Hi Bas,

   

  - UDM2 is only available for PSScene4Band at the moment.

  - You can find out more about our UDM2 in the following links:

  https://developers.planet.com/docs/api/udm-2/

  https://medium.com/planet-stories/finding-the-usable-data-in-planet-imagery-64582d21430e

   

  I believe they should contain the answers to your questions. 

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  bas altena

  • May 21, 2019 08:15

  Dear Pooja, thank you for your quick response.

  Though from these resources I am unable to find out how these UDM2 data is constructed. Is it done through training, on a scene-per-scene basis through physical/spectral relations or through stacking? If available, can references be provided?

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