Je cherche à travailler avec des bandes individuelles de l'imagerie Sentinel 2, mais il semble que je ne puisse pas interagir avec plus de trois bandes à la fois dans ArcGIS Pro 2.2.1 ou ArcMap 10.3.1.<\/P>
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Le chargement des vues Sentinel-2 depuis le catalogue ArcGIS Pro (via AGOL), directement depuis les services WMS\/ArcGIS Rest (1<\/A>, 2<\/A>) donne les mêmes 3 bandes visibles. Je peux cependant appliquer des modèles de traitement fournis avec le service rest, comme inclus dans l'image jointe. <\/P><\/P>Existe-t-il un moyen d'utiliser les 13 bandes via un WMS qui ne nécessite pas d'abonnement, ou d'extraire manuellement et de surveiller les ensembles de données open source AWS ? Idéalement, j'aimerais avoir les bandes disponibles pour des modèles de fonction raster personnalisés dans ArcGIS Pro afin de pouvoir faire des choses un peu plus sophistiquées comme la détection de changement en bordure urbaine en temps réel. <\/P><\/P>L'indice urbain est disponible ici<\/A>, par exemple. Et la détection de changement est discutée ici<\/A>, et pourrait être appliquée comme modèle de fonction raster pour une visualisation en temps réel - si seulement nous pouvions voir chacune des 13 bandes via le WMS. <\/P><\/P><\/P><\/P><\/P><\/BODY><\/HTML>
Existe-t-il un moyen d'utiliser les 13 bandes via un WMS qui ne nécessite pas d'abonnement, ou d'extraire manuellement et de surveiller les ensembles de données open source AWS ? Idéalement, j'aimerais avoir les bandes disponibles pour des modèles de fonction raster personnalisés dans ArcGIS Pro afin de pouvoir faire des choses un peu plus sophistiquées comme la détection de changement en bordure urbaine en temps réel. <\/P>
L'indice urbain est disponible
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Load the service into the map
Go to table of contents, right click --> properties --> processing templates --> none
select layer in table of contents, go to Image Service Layer on toolbar and select Symbology
... and you can assign any band to the R and G and B displays
Note the Processing Templates provide faster access to the most common band combinations and indices (see 2nd screenshot above)
Laurent,
ArcGIS has settings to take care of this resolution issue: As a property of many band related functions you can specify your choice for the output cellsize type using the selector:
This is part of all math functions, too. If you have simplified the process and use the "user defined" Method of the Band Arithmetic function (which your question indicates), your mix of band-resolutions will be resolved as the "best available". I tested the line that I have suggested with Sentinel2 in "Band Arithmetic" and it works just fine:RGB (4/3/2)
BandArithmetic Function: (B12 / B13) + (B8 / B13) + (B8 / B3)
Sorry - some city-patch - not ideal for regiolith
G.
Thank you Guenter. I'll take another look at my formula, but I think the issue is with the mix of band resolution that the Sentinel imagery is generated from. I beleive that there is a mix from 10m, 20m & 60m. So with my formulae I don't get the result I'm after. I'm comparing this to a standalone image that was created from resampled bands and then the formulae applied.
Look I'm not an expert by any means when it comes to Remote Sensing data, so I may be approaching this all wrong.
Laurent, what is your issue here? Not the results you expect? Without checking the literature:Does (B11 / B12) + (B8 / B12) + (B8 / B3) refer to the band naming/order in the Sentinel doc? Or is it (which would be crutial!)the band order in the dataset when in ArcGIS?Please keep in mind that there is a Band 8A in sentinel - and counting this is band 9 - so all following are one number up!So as a simple example: If you would need a formula like "NarrowNIR" / "Cirrus" in the sense of Sentinel doc this would be "8A" / "10" , but in the sense of band order in ArcGIS this would be "B9" / "B11" !!If that "error" happend on your formula above, the real formula most likely should be (B12 / B13) + (B8 / B13) + (B8 / B3) RegardsGuenter
Anyone have success with custom functions like this Regolith Ratio;
(B11 / B12) + (B8 / B12) + (B8 / B3)
*thirteen bands being delivered
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Thanks Abhijit.
I did try that and it wasn't obvious that any more bands had become available.
I'll give it another try soon.
Is there any particular function where it should be obvious that all three bands are being delivered? Certainly the legend and raster info items still indicated three bands only.
Simon
Simon,
set the processing templates as NONE, you will have access to all the 13 bands, Then you can apply your raster function templates to use any of the 13 bands
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