I'm trying to run a POC to expose a rest API (with a JSON response, no UI is needed), which (at first stage), trying to figure out if there is a line of sight between two points (actually, I need to see if a fresnel zone has no obstructions between two points).
I have no clue on how to get started on that. I tried using the Java SDK, but I do not need a native desktop app.
I do not understand the rest API docs. I do not understand the different things Esri is offering and to be honest, I'm a bit lost right now.
Can anyone steer me in the right direction? what is the best way of writing a restful service which uses Esri as its internal engine? Where should I start if I have never used Esri's products (or any other similar products)?