diff --git a/src/map/map.ts b/src/map/map.ts
index 6bd36a8..1e2115c 100644
--- a/src/map/map.ts
+++ b/src/map/map.ts
@@ -1,7 +1,7 @@
 import L from 'leaflet';
 
 import { readPB, readQ, type MapData } from './utils/read';
-import { type TileType } from './utils/parsePB';
+import { type TileType, tileTypes } from './utils/parsePB';
 
 type Tiles = {
     [K in TileType]: {
@@ -27,8 +27,6 @@ const gQuery: string = 'q';
 const gZoom: string = 'z';
 const params: URLSearchParams = new URLSearchParams(document.location.search);
 
-console.log(params);
-
 let mapData: MapData = {};
 
 if (params.has(gPos)) {
@@ -53,25 +51,23 @@ const map: L.Map = L.map('map', {
     minZoom: 0.5,
 });
 
-if (mapData.area) {
+if (mapData.markers?.length == 0 && mapData.area) {
     map.setView([mapData.area.lat, mapData.area.lon]);
 }
 
 if (mapData.markers) {
-    mapData.markers.forEach((marker) => {
-        let mapMarker = L.marker([marker.lat, marker.lon]).addTo(map);
-        if (marker.label) {
-            mapMarker.bindPopup(marker.label, { closeButton: false }).openPopup();
-        }
-    });
-
     if (mapData.markers.length === 1) {
         let mapMarker = mapData.markers[0];
         map.setView([mapMarker.lat, mapMarker.lon]);
     }
+
+    mapData.markers.forEach((marker) => {
+        let mapMarker = L.marker([marker.lat, marker.lon]).addTo(map);
+        mapMarker.bindPopup(marker.label, { closeButton: false }).openPopup();
+    });
 }
 
-L.tileLayer(tileProviders[mapData.tile ?? 'roadmap'].layer, {
+L.tileLayer(tileProviders[mapData.tile || tileTypes[0]].layer, {
     maxZoom: 19,
-    attribution: tileProviders[mapData.tile ?? 'roadmap'].attr,
+    attribution: tileProviders[mapData.tile || tileTypes[0]].attr,
 }).addTo(map);
diff --git a/src/map/utils/parsePB.ts b/src/map/utils/parsePB.ts
index 5778070..6d0db6f 100644
--- a/src/map/utils/parsePB.ts
+++ b/src/map/utils/parsePB.ts
@@ -1,5 +1,5 @@
 export type TileType = 'roadmap' | 'satellite';
-export const tileTypes = ['roadmap', 'satellite'];
+export const tileTypes: TileType[] = ['roadmap', 'satellite'];
 
 function convertType(item: string): [string | TileType | number, boolean] {
     item = item.replace(/^\d+/, '');
diff --git a/src/map/utils/read.ts b/src/map/utils/read.ts
index 7cd96ac..cf944e3 100644
--- a/src/map/utils/read.ts
+++ b/src/map/utils/read.ts
@@ -9,7 +9,7 @@ const dmsMatch: RegExp = /^\d{1,2}°\d{1,2}'\d{1,2}\.\d"(N|S) \d{1,2}°\d{1,2}'\
 export type Marker = {
     lat: number;
     lon: number;
-    label?: string;
+    label: string;
 };
 
 export type MapData = {
@@ -40,7 +40,7 @@ export async function readPB(param: string): Promise<MapData> {
         lon: mapArea[1],
     };
 
-    mapData.zoom = getMapZoom(mapArea[0]);
+    mapData.zoom = getMapZoom(mapArea[0]) ?? 17;
 
     let currMarkers: any[] | string = data[1];
     if (typeof currMarkers !== 'string') {
@@ -54,6 +54,7 @@ export async function readPB(param: string): Promise<MapData> {
                     mapData.markers?.push({
                         lat: lat,
                         lon: lon,
+                        label: `${lat} ${lon}`,
                     });
                 }
             } else {
diff --git a/src/map/utils/zoom.ts b/src/map/utils/zoom.ts
index ccaa47c..66729ba 100644
--- a/src/map/utils/zoom.ts
+++ b/src/map/utils/zoom.ts
@@ -1,13 +1,11 @@
 // https://groups.google.com/g/google-earth-browser-plugin/c/eSL9GlAkWBk/m/T4mdToJz_FgJ
 
 const factor: number = 35200000;
+const precision: number = 10;
 
 export function getMapZoom(alt: number): number {
-    console.log(alt);
-
-    // convert GE lookAt range to GMap zoom
     let zoom = Math.log2(factor / alt) * 1.225;
-    console.log(zoom);
+    zoom = Math.round((zoom + Number.EPSILON) * precision) / precision;
 
     if (zoom < 0) {
         zoom = 0;