diff --git a/DokoMemo/dokomemo.js b/DokoMemo/dokomemo.js
index 360d787..246ccf8 100644
--- a/DokoMemo/dokomemo.js
+++ b/DokoMemo/dokomemo.js
@@ -9,6 +9,10 @@
 	    '<a href="http://maps.gsi.go.jp/development/ichiran.html">国土地理院</a>',
 	    maxZoom: 20, maxNativeZoom: 18
 	});
+    var gsiPhoto = L.tileLayer(
+	'https://cyberjapandata.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg',
+	{attribution: '&copy; <a href="http://maps.gsi.go.jp/development/ichiran.html">国土地理院</a>',
+	 maxZoom: 20, maxNativeZoom: 18});
     var osmLayer = L.tileLayer(
 	'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
 	    attribution:
@@ -28,6 +32,7 @@
 	"(オフライン用)大学周辺OSM": offlineLayerOSM,
 	OpenStreetMap: osmLayer,
 	地理院地図: gsiLayer,
+	地理院空中写真: gsiPhoto,
     };
     function workerInit() {
 	if ('serviceWorker' in navigator) {
diff --git a/DokoMemo/img/koekimap.png b/DokoMemo/img/koekimap.png
index f3dd2ef..b50f111 100644
--- a/DokoMemo/img/koekimap.png
+++ b/DokoMemo/img/koekimap.png
Binary files differ
diff --git a/DokoMemo/img/osm-koekimap.png b/DokoMemo/img/osm-koekimap.png
index b50f111..f3dd2ef 100644
--- a/DokoMemo/img/osm-koekimap.png
+++ b/DokoMemo/img/osm-koekimap.png
Binary files differ