Latest Contributions by JeffreySwain

Imagery layers can be created from ArcGIS Pro, from a browser, or even through a Python notebook. There are different types of layers for different uses. For instance, the tile packages and the cached tiles in general are built for primarily performance not for raster analysis. The trade off is losing access to the pixel values in a pop-up to achieve better performance when displaying the imagery in the map or app. If the value of the pixels for thematic imagery or using the imagery in other analysis is important then the imagery layers from ArcGIS Image for ArcGIS Online or ArcGIS Image Server. For a layer that will simply be used to provide context to a web map or allow someone to visualize what is there, then the tile cache, tile package, or other cached imagery layer will work fine. With ArcGIS Image for ArcGIS Online, you can provide a fast displaying imagery layer with the ability to visualize it how you want because it provides access to the raster bands and pixel values. For a cached layer, those choices have already been made to provide a specific visualization. Some cached layers can be used in analysis with the proper environment settings, but in general an image service or imagery layer will provide the functionality to use the imagery as you would a image on your desktop application.  ... View more

The idea of the overviews are to improve the performance once the overviews are created. However, the processing speed is dependent on a lot of factors. Without more information about the spatial extent of the mosaic dataset, the type of input imagery used in the mosaic dataset, or the overview generation. These overviews are designed to improve the performance ultimately and if you have a lot of overviews to generate, your generation settings are turned to ignore the pyramids, or have input highly compressed images.  A few tips that I follow, is try to put the contiguous portions of the input images together and process them as a set. You can also create a mosaic dataset with other image services or other mosaic datasets. So if you have a mosaic dataset with disparate images, this is something to consider.  ... View more

Great ! All of the deep learning models have parameters to adjust to meet your classification needs.  ... View more

So @KerryHe to clarify, is the tiled imagery layer used in existing web maps/apps? This is a workflow that has been discussed in the team and wanted to understand your workflow to support it fully.  ... View more

Hey @mapmcburney , So it looks like you are creating an imagery layer through the Create Hosted Imagery Layer wizard. It also appears to be over 79 Gigs of imagery that is being used to create the imagery layer. Is that correct?  I am curious about the size of the prior imagery layers you have created. Also can you indicate if you are creating a dynamic imagery layer (image collection) or a tiled imagery layer and what type of input imagery you are using? (tif, jpg, img, etc) ... View more

Ok so there is a problem with the org with image collections. Also it appears you are using netCDFs can you tell me which version of netCDF you are using?  ... View more

Can you confirm if you can create an image collection dynamic imagery layer through the web app? If you can, then it is something else going on. Please let me know.  ... View more

So you can create dynamic imagery layers, but not image collection varieties? If you can create the dynamic layers, then you should be able to create them. What is the specific error you are getting? ... View more

Hey @GilMastrapa , You will need the image collection layer configuration in order to update it. So you will need to use that configuration. Sorry I wasn't precise before.  ... View more

Hey @GilMastrapa ,  Do you know if you are using dynamic or tiled imagery layers? The update will only work on dynamic image collections. So if you are not using the image collections, the update is not supported. As a question about your workflow, how large are the files that you are changing out every few hours? ... View more

The updating of an existing imagery layer in ArcGIS Online is something that is only available currently as a dynamic image collection, but depending on the workflow, size, and the update schedule perhaps smaller .crf based imagery layers that can be deleted and replaced may work in the meantime. It all depends on the desired workflow and usage. The multidim process I described will unlock the data in map viewer to be visualized similarly to what you can with other netCDF based or other multidimensional data. If you are not as interested in using those tools like you see here.    Then the image collection with the image filtering may be desired. Feel free to reach out to discuss some more and work through your workflow.    ... View more

Hi @NigelBerjak , Is that layer public?  Or simply on ArcGIS Online within your organization? If you share its URL I can be specific, but here is some general stuff. Depending on they type of layer, enabling the pop-ups on that layer should reveal their pixel values if they are a imagery layer from ArcGIS Image for ArcGIS Online or an image service. If the layer is a tile cache or map image, then the pixel values will not be visible.  Here is a map image layer (map service) so this one will not have access to the pixel values.  A quick reminder is looking for the Pop-ups button amongst the properties for the layer. As you can see here the pop-ups are not available.  The layer I used was from ArcGIS Image which makes all the cell/pixel values available. You can see the icon for the layer is a little different.  So if you do not own the layer, but want to see the pixel values, you have to enable the pop-ups here.  If they are available based on the layer you have selected. So not all layers have same qualities or abilities, but take a look at ArcGIS Image layers if you want to see those values. In this blog, you can read more about some of the advantages.    ... View more

If you are still having trouble, take a look at this blog.  Enable ArcGIS Image for ArcGIS Online ... View more