My experience with Esri is with ArcSDE from about 10 years ago. At this stage, I'm left with no obvious clues. Browsing the documentation, I found this page on Layers and Data. Looking at the Core Layer Types section, it looks like a
FeatureLayer isn't what I'm looking for - my database will be on Amazon RDS, not in the ArcGIS cloud.
For example, I'm thinking that I could create a web service call that returns the data from the PostgreSQL database. I could then consume this data and generate a