Latest Contributions by JeffreySwain

ArcGIS Online imagery hosting is by value, not by reference, so all the data you want to host will be hosted in ArcGIS Online. You can replace the imagery within the imagery layer and keep the same item details through the Python API. For what you have described, Image Server would be offer the 'by reference' you are looking for and allow just the inputs to be updated without replacing the entire input dataset.  ... View more

You can now update the imagery layers as described in this blog.  https://www.esri.com/arcgis-blog/products/arcgis-online/imagery/update-arcgis-online-imagery-layers-python You can also create multidimensional imagery layers as crfs or mosaic datasets and then publish them as imagery layers.  Here is another blog discussing the process.  https://www.esri.com/arcgis-blog/products/arcgis-pro/imagery/assessing-canadian-wildfire-damage-with-landsat-data-and-arcgis-online-creation-of-multidimensional-imagery Once created, you can use the time settings or multidimensional settings to manipulate them in Map Viewer.  https://doc.arcgis.com/en/arcgis-online/create-maps/configure-multidimensional.htm ... View more

My question would be if you want to display one at a time or would you want to display multiple a the same time? If you only want to display a 'slice' or one at a time, then have you considered a multidimensional imagery layer?   You could then use the multidimensional settings to control the display. https://doc.arcgis.com/en/arcgis-online/create-maps/configure-multidimensional.htm Here is a blog about how to make your own.  https://www.esri.com/arcgis-blog/products/arcgis-pro/imagery/assessing-canadian-wildfire-damage-with-landsat-data-and-arcgis-online-creation-of-multidimensional-imagery Once you create it, then you can simply show the slice or one CAD file tif you are interested. This way you wouldn't have to worry about the visibility. If you wanted more than one, then you can add the imagery layer multiple times in a map and choose different images or use the Multidimensional filter raster function to access them.  ... View more

I have a lot of questions about this. Did you ever figure out what was causing the delay?  Or did you try using Python or the web interface? https://doc.arcgis.com/en/arcgis-online/manage-data/publish-imagery-layers.htm ... View more

The Dude abides ..  ... View more

Can you share the imagery layer with 'Everyone' that may give us a clue as to what is going on if you haven't already contacted Esri Support.  ... View more

https://www.esri.com/arcgis-blog/products/arcgis-online/imagery/update-arcgis-online-imagery-layers-python https://www.arcgis.com/home/item.html?id=d15200aa7f2a49fea35784d19ae5851a#overview This functionality is available through the python api now.  ... View more

Available through the Python API.  ... View more

https://www.arcgis.com/home/item.html?id=d15200aa7f2a49fea35784d19ae5851a#overview Hi Chris, You can now overwrite the imagery layers in ArcGIS Online. I have included a python notebook and a blog that I have written about it. You can replace all the imagery information in the existing layer and maintain the item details.  https://www.esri.com/arcgis-blog/products/arcgis-online/imagery/update-arcgis-online-imagery-layers-python Multidimensional imagery layers can be updated the same way.  ... View more

Hey Thomas,  Each of the imagery layers have specific purposes and uses and there are blogs that detail some of the varied use cases. Choosing the Perfect Imagery How can tiled imagery layers make your organization more successful For your description, I would encourage you to consider an alternative if you are looking to provide a single imagery layer that shows time periods. You could use a multidimensional tiled imagery layer to accomplish the same thing. The tiled layer is a single layer that can offer what you are looking for. Here is one that I have created that shows Landsat data over the years.  Lake Mead Time Series tiled imagery layer You can use the multidimensional settings in Map Viewer or in ArcGIS Pro to display different time periods.  I have included instructions on how to create the imagery layer with the mosaic dataset.  Assess wildfire damage in ArcGIS Online This should work for your purposes. You can : Share the imagery layer publicly Display one layer at a time Show the time periods Good luck and please let me know if you have any follow up questions.  ... View more

Hi Duncan,  All of the layers in ArcGIS Online have upsides and downsides and can be used for very different purposes. For the Wayback imagery, the tile layers perform exceptionally well and look amazing. For the purposes of the Wayback machine, they perform amazingly. The app visualizes what once was so tile layers work exceptionally. For more analytical purposes, imagery layers provide pixel values and source metadata. So the wayback machine has performed its purpose as the start of your analysis and led you to other research options.  I hope your research works out and if you have any other questions feel free to message me on the Esri Community app.  ... View more

Hey Duncan,  I went in and was looking into your issue and there are a few things to discuss. So first since you are using the World Imagery layer you need to understand that while it shows imagery it is a tile layer. So what you are reviewing is the metadata of the tiles, not the source imagery. So when a tile layer is created, 'tiles' based on the source imagery are created. So the metadata you are looking at refers to the creation of the tiles rather than the source imagery. That metadata is updated each time the tiles for that tile layer are updated which happens periodically.  If you are interested in pixel values and the source imagery, then be sure to select an Imagery layer  like this one - US NAIP Imagery layer.  Once an imagery layer like that is added to ArcGIS Pro, you can use the Raster Item Explorer. Hope this helps.  Jeff ... View more

What are the pixel values ?  ... View more