Control query def of Image service

mody_buchbinder — Tue, 04 Apr 2023 08:28:50 GMT

This problem connects to other community but I would like to get a python answer.

I am creating an image service with query def.

I just create an image service (based on Mosaic). I load it into classic web map, set a query def and do a Save Layer.

When I show this image service in Web Map (classic) and Pro I can see the query def.

When I show the rest information I cannot see the query def.

I found no way in Python api or rest to change (or even see) the query def.

My understanding was that EVERYTHING is shown in the rest.

I do not see such operation in REST or property in ImageLayer for python.

Thanks

Re: Control query def of Image service

Clubdebambos — Mon, 17 Apr 2023 09:40:52 GMT

Hi @mody_buchbinder

I have no Image Service to test this on. If you have set a filter (definition query) in the WebMap it can be accessed via the Python API. The below works for layers in a WebMap. The code is commented. I hope it helps.

from arcgis import GIS ## connect to the AGOL instance agol = GIS("home") ## reference the webamp through the id provided item = agol.content.get("INSERT_WM_ID") ## reference the webmap content/config item_data = item.get_data() ## the title of the layer in the webmap wm_lyr_title = "" ## for each operationalLayer in the webmap for lyr in item_data["operationalLayers"]: ## if the layer matches the title of interest if lyr["title"] == wm_lyr_title: ## if a filter is set in the webmap the ['layerDefinition']['definitionExpression'] can be accessed try: print(lyr['layerDefinition']['definitionExpression']) ## if no filter set a Key Error will be thrown ## ['layerDefinition']['definitionExpression'] only exists in JSON when a filter set except KeyError: print(wm_lyr_title,"has no definition query / filter set")

You can also find the JSON using AGO Assistant https://ago-assistant.esri.com/

From the banner at the top of the screen click on the I want to... dropdown and select View an Item's JSON

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Control query def of Image service

Re: Control query def of Image service