Function mousedown

src/components/map/SelectMap.tsx:45–49

(e)

  const map = useMapEvents({
    mousedown(e) {
      if (!isDrag) {
        setFirstPoint(e.latlng);
      }
    },
    mousemove(e) {
      if (firstPoint) {
        lastLatlngRef.current = adjustLng(e.latlng);