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Novos serviços de imagem Landsat Collection 2

EmilyWindahl

Na primavera de 2021, a Esri introduzirá novos serviços de imagem Landsat compostos por imagens Landsat 8, Collection 2 Level-2 lançadas pelo USGS em dezembro de 2020. Esses novos serviços não incluirão apenas todas as melhorias de qualidade da Collection 2, mas também fornecerão aos usuários imagens corrigidas atmosfericamente e prontas para análise com a atualização adicional dos produtos Level-1 para Level-2.<\/P>

O plano original era aposentar os serviços existentes, mas descobrimos que <\/SPAN>não<\/STRONG> <\/SPAN>iremos aposentar os serviços existentes, afinal. Continuaremos a suportar e atualizar todos os serviços de imagem Landsat Level-1 existentes além de publicar o novo serviço Level-2<\/SPAN>.<\/P>Para mais detalhes, confira Introduzindo Landsat Collection 2<\/A>.<\/P>

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Comentários

MattWilkie1

Thank you for the clarification @RWaterman. So is my revised understanding correct: it is not possible to narrow to a specific pre-Landsat 8 year, say 1987, using existing ArcGIS Online services?

Background: we have staff who are using Google Earth Engine to extract specific historical years from Landsat going back to 1984 for analysis in ArcGIS Desktop. It's created an administrative storage and management problem in the filesystem as people cache their own idiosyncratic copies. I'm looking at options alleviate this overhead.

RWaterman

@MattWilkie1 , we will have the new Collection 2 service available very soon to provide as much overlap and transition time as we possibly can.

We will post details in the blog post Emily noted as soon as the new service is available: Introducing Landsat Collection 2 and retiring Collection 1.

The new service is just Landsat 8 Collection 2 (as replacement for the existing Landsat 8 Collection 1).

MattWilkie1

It doesn't like there is to be any service availability overlap between Collection 1 retiring and Collection 2 being brought online. Is that right? We're only a few weeks away from C1 going away and I haven't found any C2 availability. How are we to prep for the change? What do we do with new projects being created now that seek to use these services? Is historical landsat 4&5 going to be in the C2 service or is just LS8? (At only every 5 years the GLS service is temporally coarser grained than what we're looking for.)

Thanks!

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