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My map with gradient color symbology looks/acts correctly in ArcGIS Pro. When I successfully upload it into ArcGIS Online, the colors no longer match up with the data. I think this has something to do with the fact that the data is a one-to-many relationship for the 50 US States (multiple data points for each state over time): I think ArcGIS Online is not reading the polygon boundaries correctly because there are overlapping, existing polygons for each state(for example: Each row of data for Alabama contains the same polygon column information). Is there a way for me to display this correctly on ArcGIS Online?

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To get the desired output we need to have the table in ArcGIS online, and the workflow is given below:-

  1. Create a relationship class between the feature class and the table based on the Global ID and GUID fields.

  2. Publish the feature class and the related table to ArcGIS Online as a hosted feature layer.

  3. Open the hosted feature layer in ArcGIS Online Map Viewer, and join the related table with the feature layer.

    a) In ArcGIS Online Map Viewer, click the Analysis tab, and navigate to Summarize Data > Join Features.

    b) In the Join Features pane, select the feature layer for Choose target layer.

    c) For Choose layer to join to target layer, select the related table.

    d) For Select the type(s) of joins, click Choose the fields to match and select the Global ID and GUID fields.

    e) Select the join operation type, and specify a name for the Result layer name.

    f) Click RUN ANALYSIS to perform the join. A new, joined feature layer containing the related table values is added to the Contents pane.

  4. Symbolize the joined feature layer with values from the related table.

    a) On the Details tab, click Content to view the layers in the Contents pane.

    b) Hover over the joined feature layer, and click Change Style.

    c) In the Change Style pane, for Choose an attribute to show, select the desired fields from the related table to symbolize the layer.

    d) For Select a drawing style, select Types (Unique Symbols), and click OPTIONS to configure the symbol.

    e) Click OK, and click DONE to apply the symbol. The layer is symbolized with values from the related table.

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  • Would you mind clarifying more about creating a relationship class between the feature class and the table based on the Global ID and GUID fields? I established a one-to-many relationship in the ArcGIS Online join. After I did the online join, each row was assigned a unique Object ID- is this not enough? I also noticed after the online Join that all of my dates are now off. Thank you. Commented Nov 15, 2020 at 17:07
  • support.esri.com/en/technical-article/000015422, this is for use in ArcGIS Collector, you can follow the exact workflow. Commented Nov 15, 2020 at 17:34
  • Thank you for your assistance- I'm beginning to understand the problem better! I followed the tutorial and then executed the ArcGIS Online join, but am still ending up with only the 50 rows of data from my original target layer. I have 1006 total rows from the related table that should have been added. Any suggestions? There seems to be an issue with the one-to-many relationship. Commented Nov 15, 2020 at 18:44

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