Delphi Readers and Writers JSON Framework

[wright 2]

Hello,
I am learning to use the TJSONIterator(Readers and Writers JSON Framework) under delphi 10.3.3 and I found a russian link putting this into practice through the creation of an application assessing the negative impact on the environment: https://webdelphi.ru/. 

Firstly, i have a custom class definition named "NVOS.JsonParser.pas" and the "open-data-1.json" file, i don't know how to proceed

However, I can't figure out already knowing that the result should look like: "App.png". 

 

open-data-1.json