Amchart map from geojson, just show a rectangle

Question

My Output

This is my output, just a rectangle, not like a maps when I try it at geojson.io or mapshapper, and there is no error in my browser console..

My Geojson

I already use "id" inside features object, this is my sample geoJson :

{type: "FeatureCollection", features: Array(14)}
features: Array(14)

0:
geometry: {type: "Polygon", coordinates: Array(1)}
properties:{
id: 332112
kabupaten: "DEMAK"
kecamatan: "Bonang"
provinsi: "JAWA TENGAH"
__proto__: Object
type: "Feature"
__proto__: Object
}

1: {type: "Feature", geometry: {…}, properties: {…}}
2: {type: "Feature", geometry: {…}, properties: {…}}

AmChart Code

My vue js code to load amcharts map

import * as am4core from "@amcharts/amcharts4/core"
import * as am4maps from "@amcharts/amcharts4/maps"
import robots from "./assets/demak"

export default {
  mounted() {
    let map = am4core.create("chartdiv", am4maps.MapChart)

    map.geodata = robots

    console.log(robots);


    map.projection = new am4maps.projections.Miller()
    var polygonSeries = map.series.push(new am4maps.MapPolygonSeries())
    polygonSeries.useGeodata = true

    var polygonTemplate = polygonSeries.mapPolygons.template;
polygonTemplate.fill = am4core.color("#74B266");
polygonTemplate.tooltipText = "{KABUPATEN}";
var hs = polygonTemplate.states.create("hover");
hs.properties.fill = am4core.color("#367B25");

// Add zoom control
map.zoomControl = new am4maps.ZoomControl();

  },
  beforeDestroy() {
    if (this.map) {
      this.map.dispose()
    }
  }
}

Answer 1

The problem is mapshaper was rearranging your maps coordinates in the anti-clockwise direction and Amharts assume it arranged clockwise.
You can read the explanation and try python code to re-arrange it in:
https://www.wemcouncil.org/wp/how-to-make-mapshaper-output-compatible-with-amcharts4-using-python
it work for my case.