How to modify Text in Sketch Layer

[KazFukuoka]

There is a Web Map that has a Sketch Layer with a Text in it.
How can I modify the Text by using ArcGIS API for Python?

[Clubdebambos · Accepted solution]

Hi @KazFukuoka,

Here's how you can do it...

from arcgis.gis import GIS

## access ArcGIS Online
agol = GIS("home")

## the name of the Sketch layer in the layer list
sketch_lyr_name = "Sketch"

## get the WebMap as an item object
item = agol.content.get("WM_ITEM_ID")

## get the WebMap JSON definition as a dictionary
item_data = item.get_data()

## for each layer in the operationalLayers
for lyr in item_data["operationalLayers"]:
    ## when we hit the Sketch layer of interest
    if lyr["title"] == sketch_lyr_name:
        ## iterate over the layers in the Sketch layer eg. Polygons, Polylines, Points, Text
        for sketch_lyr in lyr["featureCollection"]["layers"]:
            ## we are interested in the Text layer of the Sketch
            if sketch_lyr["layerDefinition"]["name"] == "Text":
                ## for each feature in the Text layer of the skatch
                ## at this point if there is only one text you could use
                ## indexing instead sketch_lyr["featureSet"]["features"][0]
                for f in sketch_lyr["featureSet"]["features"]:
                    #print(f["symbol"]["text"])
                    ## if the current text begins with what we are looking for
                    if f["symbol"]["text"].startswith("UNIQUE START OF TEXT"): # UPDATE CODE HERE
                        ## update the text
                        f["symbol"]["text"] = "UPDATED TEXT" # UPDATE CODE HERE

## update the WebMap Item definition
updated_properties = {"text" : item_data}
item.update(item_properties=updated_properties)

Update the text in lines 29 and 31.

Please let us know if this works for you.

All the best,

Glen

[KazFukuoka]

Thank you for the detailed answer. This is amazing.
I am almost there.

- I fould f["symbol"]["text"] and modified.
- item.update() returned True.
- But the change does not happen online.

Is there any "commit" or "writeback" necessary?

    itemWebMap = gis.content.get(IdWebMapContacts)
    dataWebMap = itemWebMap.get_data()

    for layerOp in dataWebMap['operationalLayers']:
        if layerOp['title'] != NameSketch: continue

        for layerFeature in layerOp['featureCollection']['layers']:
            if layerFeature['layerDefinition']['name'] != 'Text': continue

            if len(layerFeature['featureSet']['features']) != 1:
                ErrorExit('There must be one feature')

            for feature in layerFeature['featureSet']['features']:
                feature['symbol']['text'] += '<<UPDATED TEXT>>'

    dataNew = {'text' : dataWebMap}
    result = itemWebMap.update(item_properties=dataNew)
    if not result:
        ErrorExit('Update failed')

[Clubdebambos]

Hi @KazFukuoka,

Do not use <> in your testing text on line 14, it probably thinks this is a tag (html). It does not work with <> but I removed and worked just fine.

[KazFukuoka]

Wow, I never thought about it. Everything is working now.
Thanks a lot for the detailed info 😀