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Mr SID & ArcGIS Online

JD1016

Olá,

Eu tenho um mosaico Mr. SID de resolução de 3 polegadas, RGB, esfera auxiliar web mercator que pesa 24 gigas.

Eu gostaria muito de adicionar essa imagem à minha galeria de mapas base no arcgis online para torná-la disponível tanto para meus clientes internos quanto móveis.

No passado, eu criei pacotes de tiles, deixei o Desktop fazer o processamento e carreguei no ArcGIS Online, mas não com um mosaico desse tamanho.

Tenho entendido que você não pode criar um pacote de tiles usando uma imagem Mr. SID. Isso está correto?

Também ouvi dizer que convertê-lo para um TIF usando JPEG YCbCr para compressão a 75% resultará em um produto ainda maior. Isso está correto?

Se tudo isso estiver correto, então como posso colocar essa imagem no ArcGIS Online para ser usada como uma camada de tiles hospedada a partir de um pacote de tiles carregado?

Obrigado.

Jeff

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Mosaic datasets

Accepted answers

jcarlson

Check out the Extract Package tool for getting the files out of the tile pack.

https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/extract-package.htm

Seems silly to do it in two tools, but I don't know if there's a direct method to just output the tiles in a folder structure in the first place. At least, not in ArcGIS.

Since you basemap gallery is made up of web maps, it really doesn't matter where the tiles are coming from. Our basemaps use a custom URL from where the tiles are stored, so I add the layer via URL, then save the web map and share it to our basemap group.

All comments

JD1016

Excellent! Thank you, Josh!

Jeff

jcarlson

Check out the Extract Package tool for getting the files out of the tile pack.

https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/extract-package.htm

Seems silly to do it in two tools, but I don't know if there's a direct method to just output the tiles in a folder structure in the first place. At least, not in ArcGIS.

JD1016

I've never generated a tile cache as a directory of tile images. That interesting. All my current aerials were uploaded via a tile package and "unwrapped" so to speak in AGO saving the credits as you mentioned. These are then added to the Basemap Gallery widget for each of my applications so the user can select different aerial years for viewing and swapping out the basemap backdrop as they go along.

Is there any documentation accessible discussing the generation of a tile cache as a directory of tile images?

How would this work in conjunction with my current setup using the Basemap Gallery widget for my other aerials?

Thanks.

Jeff

jcarlson

It's my understanding you cannot create a tile package using a Mr. SID image. Is that correct?

No, that's not correct. When you publish a tile package to AGOL, the input file can be any recognized raster format. Many of our basemap tiles started as SIDs.

If you publish a hosted imagery service from it, you will end up moving the entire file to AGOL, which will cost you lots of credits. But you get the option to manage the cache on AGOL. If you just generate a tile package locally, you can publish that to AGOL itself, and at least save the SID storage space.

Another alternative is to generate your tile cache as a directory of tile images. Instead of a .tpkx file or what have you, it would be JPEGs in nested folders like 4/14/233.jpg.

Once you have those tiles generated, you can just drop them on any publicly-accessible file hosting platform or web server (we use AWS S3), and you can add the imagery service to your maps using a url like http://web-host/your-tileset-name/{z}/{x}/{y}.jpg and the web map will grab the tiles based on the visible extent and zoom level.

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