Composite symbol

Stack several symbols into one. This is the real source of the example app’s composite-symbol screen — run it on a device or simulator to see it live.

app/symbols/composite-symbol.tsx

import { Graphic, GraphicsOverlay, Map, MapView, type Symbol } from 'expo-arcgis';

// A composite symbol draws several symbols stacked as one — here a white halo behind a red dot,
// a common "pin" look built without a picture marker.
const PIN: Symbol = {
  type: 'composite',
  symbols: [
    { type: 'simple-marker', color: '#ffffff', size: 22 },
    { type: 'simple-marker', color: '#e63946', size: 11 },
  ],
};

/** A composite symbol stacks several symbols into one — a white halo behind a red dot. */
export default function CompositeSymbol() {
  return (
    <Map basemap="arcGISNavigation" initialViewpoint={{ latitude: 34.05, longitude: -118.24, scale: 1_000_000 }}>
      <GraphicsOverlay>
        <Graphic geometry={{ type: 'point', x: -118.24, y: 34.05 }} symbol={PIN} />
      </GraphicsOverlay>
      <MapView style={{ flex: 1 }} />
    </Map>
  );
}