diff --git a/main.js b/main.js
index 24ffeb8..bd94c74 100644
--- a/main.js
+++ b/main.js
@@ -179,34 +179,38 @@ function changeBaseMap(newMap){
       basemapStyle = "https://tiles.openfreemap.org/styles/liberty"
       break;
     case "google_satellite":
-      basemapStyle = {
+   basemapStyle = {
     version: 8,
     sources: {
       "raster-tiles": {
         type: "raster",
         tiles: [
-          "https://mt0.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
-          "https://mt1.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
-          "https://mt2.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
-          "https://mt3.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
+          "https://api.maptiler.com/tiles/satellite-v2/{z}/{x}/{y}.jpg?key=6mG881AthmTTWyLvFyjH"
         ],
         tileSize: 256,
-      },
+        attribution: "© MapTiler",
+        maxzoom: 20
+      }
     },
-    layers: [{ id: "raster-layer", type: "raster", source: "raster-tiles" }],
+    layers: [
+      {
+        id: "satellite-layer",
+        type: "raster",
+        source: "raster-tiles"
+      }
+    ]
   }
     break;
   case "terrain":
     basemapStyle = {
         version: 8,
         sources: {
-            osm: {
-                type: 'raster',
-                tiles: ['https://a.tile.openstreetmap.org/{z}/{x}/{y}.png'],
-                tileSize: 256,
-                attribution: '© OpenStreetMap Contributors',
-                maxzoom: 19
-            },
+            topo: {
+        type: 'raster',
+        url: 'https://api.maptiler.com/maps/topo-v4/tiles.json?key=6mG881AthmTTWyLvFyjH',
+        tileSize: 256,
+        maxzoom: 20
+      },
             // Use a different source for terrain and hillshade layers, to improve render quality
             terrainSource: {
                 type: 'raster-dem',
@@ -219,9 +223,9 @@ function changeBaseMap(newMap){
         },
         layers: [
             {
-                id: 'osm',
+                id: 'topo',
                 type: 'raster',
-                source: 'osm'
+                source: 'topo'
             },
             {
                 id: 'hills',
@@ -242,18 +246,15 @@ function changeBaseMap(newMap){
       basemapStyle =  {
         version: 8,
         sources: {
-            osm: {
-                type: 'raster',
-                 tiles: [
-                  "https://mt0.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
-                  "https://mt1.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
-                  "https://mt2.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
-                  "https://mt3.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
+             "raster-tiles": {
+        type: "raster",
+        tiles: [
+          "https://api.maptiler.com/tiles/satellite-v2/{z}/{x}/{y}.jpg?key=6mG881AthmTTWyLvFyjH"
         ],
-                tileSize: 256,
-                attribution: '© OpenStreetMap Contributors',
-                maxzoom: 19
-            },
+        tileSize: 256,
+        attribution: "© MapTiler",
+        maxzoom: 20
+      },
             // Use a different source for terrain and hillshade layers, to improve render quality
             terrainSource: {
                 type: 'raster-dem',
@@ -266,9 +267,9 @@ function changeBaseMap(newMap){
         },
         layers: [
             {
-                id: 'osm',
+                id: 'raster-tiles',
                 type: 'raster',
-                source: 'osm'
+                source: 'raster-tiles'
             },
             {
                 id: 'hills',