Adrian,
Here is a screen shot of the legend.
Notice that the 1% Annual Chance shows up 20 times, the Regulatory Floodway shows up 11 times, the Special Floodway shows up 4 times, and the 0.2% Annual Chance shows up 5 times. What I would like is for each of these to only appear once. This is public NFHL data from the FEMA REST site Layer: Flood Hazard Zones (ID: 28)
I've tried all the setting on Pro that I could. By looking at the table of content, my best guess is that the FEMA Flood Hazard data has the 1% Annual Chance data broken into 20 records for the current extent and that is why it shows 20 times.
Here is a screen shot showing the layer in the table of contents.
I'm seeing now that what shows in the table of contents is what is showing in the legend, and that does make sense. I was hoping to use the REST URL because then the floodplain would update when FEMA updates it. Instead I've got to download the digital data, apply whatever symbology I want, and then create a legend. But then I've got to keep an eye on the data because if it gets updated, then I have to download the new data, and point the layer to that new downloaded data.
I'd say the problem is not the legend, but the data.
I should have looked at the table of contents before asking the question.
Thank you for looking at my question.
Brian Anderson