patchie

What do i need to do with the data to present a map on screen in a website and to be able to interact with it? I want to make a map with my own data stored in postgres, and be able to create polygons and chains of straight lines using mousepointer to send postgis queries back to the server. I want to use Postgres with Postgis, and Python3 using flask. My example: I need the shapes stored in a database (postgres for example) I need a technology to calculate data positions for me (ex. postgis) Then i need something that talks to Postgis (ex. GeoAlchemy2) Then i need a javascript client to show the data? (like QGIS Web Client?) Giving me alternative libs/extensions/apps i can use for my project is a bonus Thanks in advance.