簡易逆ジオコーディングサービスをUnityで使う

using Mapbox.Unity.Location;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using UnityEngine;
using UnityEngine.Networking;

public class ReverseGeocoding : MonoBehaviour
{
	const string ApiUrl = "https://aginfo.cgk.affrc.go.jp/ws/rgeocode.php";

	void Start()
	{
			string requestUrl = ApiUrl;

			Dictionary<string, string> keyValuePairs = new Dictionary<string, string>();
			keyValuePairs["lat"] = "34.6";
			keyValuePairs["lon"] = "133";
			keyValuePairs["ax"] = "10";
			keyValuePairs["ar"] = "1000";
			keyValuePairs["opt"] = "jpr";

			if (keyValuePairs.Count > 0)
			{
				string paramJoinedStr = string.Join("&", keyValuePairs.Select(pair => string.Format("{0}={1}", pair.Key, pair.Value)));
				requestUrl = string.Format("{0}?{1}", requestUrl, paramJoinedStr);
			}

			StartCoroutine(GetRequest(requestUrl));
		}
	}

	IEnumerator GetRequest(string uri)
	{
		using (UnityWebRequest webRequest = UnityWebRequest.Get(uri))
		{
			yield return webRequest.SendWebRequest();

			if (webRequest.isNetworkError)
			{
				Debug.Log("Error: " + webRequest.error);
			}
			else
			{
				Debug.Log("Received: " + webRequest.downloadHandler.text);

				XDocument xml = XDocument.Parse(webRequest.downloadHandler.text);
				XNamespace nsSys = "http://aginfo.cgk.affrc.go.jp/ts";

				XElement rgeocode = xml.Element(nsSys + "rgeocode");
				if (rgeocode != null)
				{
					XElement result = rgeocode.Element(nsSys + "result");
					if (result != null)
					{
						XElement prefecture = result.Element(nsSys + "prefecture");
						if (prefecture != null)
						{
							XElement pcode = prefecture.Element(nsSys + "pcode");
							if (pcode != null)
							{
								Debug.Log("pcode.Value : " + pcode.Value);
							}
							XElement pname = prefecture.Element(nsSys + "pname");
							if (pname != null)
							{
								Debug.Log("pname.Value : " + pname.Value);
							}
						}
					}
				}
			}
		}
	}
}