Cell information of rasters for web map

[NigelBerjak]

Hi all

I have some large raster datasets that I want to obtain the cell values from in ArcGIS online via a web map. However currently, after tiling the raster, it seems that I cannot get the cell value via a popup unless I then link a feature collection of polygons, containing the values. I can do this, but it eats credits like Pac-Man eats food and is not sustainable.

This is a general question about the raster popup cell values, however the current datasets I am trying to incorporate are the Global Wind Atlas data sets that they have available i.e. if I could get these using a WMS or similar service, presently it would overcome my difficulty. However the principle for me is more how to produce a raster for ArcGIS online web maps that can have pop-up information be displayed from cell values.

Thanks and I hope someone has a simple solution that I have overlooked.

[JayantaPoddar]

You would need to create Image Service (ArcGIS Enterprise Server required). This capability is currently unavailable with ArcGIS Online, thus ArcGIS Enterprise + Image Server (optional) required.

ArcGIS Image for ArcGIS Online is coming soon, if you can wait.

Also image tiling directly in ArcGIS Online consumes a high amount of credits, as you mentioned. In future, you can proceed by creating map tile package and then upload to ArcGIS Online (For creating Basemaps, etc.)

[NigelBerjak]

Hi Jayanta

Thanks for your quick response. Unfortunately I do not have access to an Enterprise server, so this is not an option. Do you have a time frame of when the implementation is going to occur? I have a client wanting to incorporate these types of information.

ps. Yes, I am now processing everything on my PC.

[JayantaPoddar]

You could connect with your local Esri distributor to get a confirmation on the (approximate) release date of ArcGIS Image for ArcGIS Online, if available. I don't want to take a rough guess since its product page says "Coming Soon".

Maybe someone from the product team can confirm.

[NigelBerjak]

Hi Jayanta

Thanks. I will contact the South African help desk and ask them to review. This seems to be quite a basic thing that really should be part of any GIS, online or desktop, I would think. Hopefully the time frames will not be months as I need a workable solution soon.

[JeffreySwain]

Hi @NigelBerjak ,

I hope that you were able to access the pixel values through ArcGIS Image for ArcGIS Online. Access to the pixel values are a standard for both types of imagery layers in ArcGIS Image for ArcGIS Online. 

[NigelBerjak]

Hi Jeffrey

Thanks for your response. Please can you advise how you managed this approach so I can try to replicate it on one of my web layer rasters, and example of which is included below. I am using AGOL and not my own web server.

 

[JeffreySwain]

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. 

[NigelBerjak]

Hi Jeffrey

I see that the layer I created (https://tiles.arcgis.com/tiles/1JzTHhMEiV3vKRuI/arcgis/rest/services/ZAF_CF_IEC3_Unique_download_det...) is a Tile Layer (hosted) map service (see image below)

What do I need to upload this file, from ArcPro, as in order to allow the pixel values to be accessible? Previously I have linked a vector point file with the data to 'enable' values, but this consumes so many credits that it makes it extremely prohibitive.

Regards,

Nigel

[shawnvickers]

Has anyone solved this?  I have the same problem.  I can't understand why such a basic GIS function is so needlessly complicated.  This is exactly why people look for alternatives to ESRI software.