diff --git a/app/build.gradle b/app/build.gradle
index 40adf01..dbf7c23 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -27,6 +27,8 @@
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     // Retrofit
     implementation "com.squareup.retrofit2:retrofit:2.5.0"
+    //Jackson
+    implementation 'com.squareup.retrofit2:converter-jackson:2.5.0'
     //QRコードリーダー
     implementation 'com.journeyapps:zxing-android-embedded:3.6.0'
     implementation 'com.android.support:design:28.0.0'
diff --git a/app/src/main/java/com/example/cosmosclient/retrofitsample/Ele.java b/app/src/main/java/com/example/cosmosclient/retrofitsample/Ele.java
new file mode 100644
index 0000000..22eb70a
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/retrofitsample/Ele.java
@@ -0,0 +1,6 @@
+package com.example.cosmosclient.retrofitsample;
+
+public class Ele {
+    public String elevation;
+    public String hsrc;
+}
diff --git a/app/src/main/java/com/example/cosmosclient/retrofitsample/GisActivity.java b/app/src/main/java/com/example/cosmosclient/retrofitsample/GisActivity.java
new file mode 100644
index 0000000..e85e386
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/retrofitsample/GisActivity.java
@@ -0,0 +1,60 @@
+package com.example.cosmosclient.retrofitsample;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+
+import com.example.cosmosclient.R;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+public class GisActivity  extends AppCompatActivity{
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_gis);
+
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl("http://cyberjapandata2.gsi.go.jp/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        GisService service = retrofit.create(GisService.class);
+//        ObjectMapper mapper = new ObjectMapper();
+//        try {
+//            ArrayList<Ele> list = mapper.readValue((InputStream) service.listEles(140.08531, 36.103543, "JSON"), new TypeReference<ArrayList<Ele>>() {});
+//        } catch (IOException e) {
+//            e.printStackTrace();
+//        }
+
+        Call<Ele> call = service.listEles(140.08531, 36.103543, "JSON");
+        call.enqueue(new Callback<Ele>() {
+            @Override
+            public void onResponse(Call<Ele> call, Response<Ele> response) {
+                if (response.isSuccessful()) {
+                    Ele result = response.body();
+                    System.out.println(result.elevation);
+                    System.out.println(result.hsrc);
+                }
+            }
+
+            @Override
+            public void onFailure(Call<Ele> call, Throwable t) {
+                t.printStackTrace();
+            }
+
+        });
+    }
+
+}
diff --git a/app/src/main/java/com/example/cosmosclient/retrofitsample/GisService.java b/app/src/main/java/com/example/cosmosclient/retrofitsample/GisService.java
new file mode 100644
index 0000000..f036f50
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/retrofitsample/GisService.java
@@ -0,0 +1,15 @@
+package com.example.cosmosclient.retrofitsample;
+
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+
+import java.util.ArrayList;
+
+import retrofit2.Call;
+import retrofit2.http.GET;
+import retrofit2.http.Query;
+
+public interface GisService {
+    @GET("general/dem/scripts/getelevation.php")
+    Call<Ele> listEles(@Query("lon") double lon, @Query("lat") double lat, @Query("outtype") String outtype);
+
+}
diff --git a/app/src/main/res/layout/activity_gis.xml b/app/src/main/res/layout/activity_gis.xml
new file mode 100644
index 0000000..d8fb324
--- /dev/null
+++ b/app/src/main/res/layout/activity_gis.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</android.support.constraint.ConstraintLayout>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index fafc1b9..02199bb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@
         
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.0'
+        classpath 'com.android.tools.build:gradle:3.4.1'
         
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 18955ab..ff18aab 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Fri Apr 26 15:58:11 JST 2019
+#Tue May 28 15:35:44 JST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip