From 1e08deb7823af157237b64f96219b3c333e08c16 Mon Sep 17 00:00:00 2001
From: Joe McMahon <joe@mcmahongroup.org>
Date: Wed, 11 Feb 2026 09:45:40 -0500
Subject: [PATCH] Updated with lint and build clean up

---
 public/modules/io/export.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/public/modules/io/export.js b/public/modules/io/export.js
index f4166f96..3f9db732 100644
--- a/public/modules/io/export.js
+++ b/public/modules/io/export.js
@@ -664,7 +664,8 @@ function saveGeoJsonZones() {
     const coordinates = getZonePolygonCoordinates(zone.cells);
     
     // Only add feature if we have valid coordinates
-    if (coordinates[0].length > 1) {
+    // GeoJSON LinearRing requires at least 4 positions (with first == last)
+    if (coordinates[0].length >= 4) {
       const properties = {
         id: zone.i,
         name: zone.name,