From f8349862ffac4fa832c9d6a2438e7e051fe8944b Mon Sep 17 00:00:00 2001
From: ingalls <nick@ingalls.ca>
Date: Wed, 2 Oct 2024 10:42:23 -0400
Subject: [PATCH] Check if source exists

---
 api/web/src/stores/map.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/api/web/src/stores/map.ts b/api/web/src/stores/map.ts
index 27d514324..9cbedc8f3 100644
--- a/api/web/src/stores/map.ts
+++ b/api/web/src/stores/map.ts
@@ -116,7 +116,7 @@ export const useMapStore = defineStore('cloudtak', {
         // TODO: Convert to overlay
         addTerrain: async function(): void {
             const basemaps = await this.listTerrain();
-            if (basemaps.items.length) {
+            if (basemaps.items.length && !this.map.getSource('-2')) {
                 this.map.addSource('-2', {
                     type: 'raster-dem',
                     url: String(stdurl(`/api/basemap/${basemaps.items[0].id}/tiles?token=${localStorage.token}`)),