This is a demo tutorial. While there is no step-by-step commentary available (yet), the live demo below is fully functional. Feel free to open it for full source code.
This demo shows how we can use any image as a MapChart background that pans and zooms together with the map itself.
See the Pen amCharts 4: Use custom image as draggable and zoomable MapChart background by amCharts team (@amcharts) on CodePen.24419