Google Pickerを使って場所（緯度・経度）を選択させる https://blog.r3it.com/google-picker-map-81ad931d5bd0

entry.jsx

// @flow
import React from "react";
import { render } from "react-dom";
import Picker from "./Picker";

(function () {

  kintone.events.on(["app.record.create.show", "app.record.edit.show"], (event: Kintone.RecordEvent) => {

    const elm = kintone.app.record.getSpaceElement("space1");
    if (!elm) {
      return event;
    }

    const picked = data => {
      if (data && data.action === "picked" && data.docs && data.docs[0]) {
        const doc = data.docs[0];
        const item = kintone.app.record.get();
        item.record["緯度"]["value"] = doc.latitude || "";
        item.record["経度"]["value"] = doc.longitude || "";
        item.record["name"]["value"] = doc.name || "";
        item.record["url"]["value"] = doc.url || "";
        item.record["address"]["value"] = (doc.addressLines && doc.addressLines[0]) ? doc.addressLines[0] : "";
        kintone.app.record.set(item);
      }
    };

    render(
      <Picker onChange={picked} />,
      elm
    );

    return event;

  });

})();