diff --git a/src/plugins/layers/useGrayLine.js b/src/plugins/layers/useGrayLine.js
index 55eb769..af4d115 100644
--- a/src/plugins/layers/useGrayLine.js
+++ b/src/plugins/layers/useGrayLine.js
@@ -631,44 +631,9 @@ export function useLayer({ enabled = false, opacity = 0.5, map = null }) {
           const lowerSeg = lowerSegments[i];
           
           if (upperSeg.length > 1 && lowerSeg.length > 1) {
-            // Get the longitude range for this segment
-            const segLons = upperSeg.map(p => p[1]);
-            const segMinLon = Math.min(...segLons);
-            const segMaxLon = Math.max(...segLons);
-            
             // Create polygon from upper segment + reversed lower segment
-            let enhancedZone = [...upperSeg, ...lowerSeg.reverse()];
-            
-            // If this segment is at a map edge (near ±180°), close it properly
-            // by extending to the map bounds
-            const isWestEdge = segMinLon < -170;  // Near -180°
-            const isEastEdge = segMaxLon > 170;   // Near +180°
-            
-            if (isWestEdge || isEastEdge) {
-              // Get the latitude range
-              const lats = enhancedZone.map(p => p[0]);
-              const maxLat = Math.max(...lats);
-              const minLat = Math.min(...lats);
-              
-              // Close the polygon by adding corner points at the map edge
-              if (isWestEdge) {
-                // Add corners at -180°
-                const firstLat = enhancedZone[0][0];
-                const lastLat = enhancedZone[enhancedZone.length - 1][0];
-                enhancedZone.push([lastLat, -180]);
-                enhancedZone.push([maxLat, -180]);
-                enhancedZone.push([firstLat, -180]);
-              }
-              
-              if (isEastEdge) {
-                // Add corners at +180°
-                const firstLat = enhancedZone[0][0];
-                const lastLat = enhancedZone[enhancedZone.length - 1][0];
-                enhancedZone.push([lastLat, 180]);
-                enhancedZone.push([maxLat, 180]);
-                enhancedZone.push([firstLat, 180]);
-              }
-            }
+            // This creates a closed shape between the two lines
+            const enhancedZone = [...upperSeg, ...lowerSeg.slice().reverse()];
             
             // Debug: Show longitude range of this polygon
             const polyLons = enhancedZone.map(p => p[1]);
@@ -679,9 +644,7 @@ export function useLayer({ enabled = false, opacity = 0.5, map = null }) {
               upperPoints: upperSeg.length,
               lowerPoints: lowerSeg.length,
               totalPolygonPoints: enhancedZone.length,
-              lonRange: `${polyMinLon.toFixed(1)} to ${polyMaxLon.toFixed(1)}`,
-              isWestEdge,
-              isEastEdge
+              lonRange: `${polyMinLon.toFixed(1)} to ${polyMaxLon.toFixed(1)}`
             });
             
             const enhancedPoly = L.polygon(enhancedZone, {