From f1e31cb721886d94c855a1809ac74fa835113409 Mon Sep 17 00:00:00 2001
From: Hamza-Ayed <hamzaayedflutter@gmail.com>
Date: Tue, 18 Aug 2026 12:54:35 +0300
Subject: [PATCH] refactor(tactical): remove ridge lines to keep map
 uncluttered and focused strictly on wadi flows

---
 apps/web/src/utils/elevationService.ts | 80 --------------------------
 1 file changed, 80 deletions(-)

diff --git a/apps/web/src/utils/elevationService.ts b/apps/web/src/utils/elevationService.ts
index 3f7f4c7..2406e5d 100644
--- a/apps/web/src/utils/elevationService.ts
+++ b/apps/web/src/utils/elevationService.ts
@@ -1131,87 +1131,7 @@ export async function calculateTerrainStudy(
     }
   }
 
-  // 7. Trace Natural Ridge Watershed Divides (Dominant High Crests)
-  // Crest cells: high elevation, local peak curvature, divergent flow (low flow accumulation)
-  const ridgeCandidates: Array<{ r: number; c: number; elev: number; tpi: number }> = [];
-  for (let r = 1; r < gridSize - 1; r++) {
-    for (let c = 1; c < gridSize - 1; c++) {
-      const el = elevationGrid[r][c];
-      if (el >= minElev + relief * 0.45 && flowAcc[r][c] <= 2) {
-        // Compute 3x3 local mean
-        let sum = 0;
-        let count = 0;
-        for (let dr = -1; dr <= 1; dr++) {
-          for (let dc = -1; dc <= 1; dc++) {
-            sum += elevationGrid[r + dr][c + dc];
-            count++;
-          }
-        }
-        const localMean = sum / count;
-        const tpi = el - localMean;
-        if (tpi >= 1.5) {
-          ridgeCandidates.push({ r, c, elev: el, tpi });
-        }
-      }
-    }
-  }
 
-  // Group connected ridge candidates into crest lines
-  const visitedRidge = Array(gridSize).fill(false).map(() => Array(gridSize).fill(false));
-  for (const rc of ridgeCandidates) {
-    if (visitedRidge[rc.r][rc.c]) continue;
-    const ridgeLine: [number, number][] = [];
-    let currR = rc.r;
-    let currC = rc.c;
-
-    while (currR >= 0 && currR < gridSize && currC >= 0 && currC < gridSize) {
-      visitedRidge[currR][currC] = true;
-      const pt = gridCoords[currR * gridSize + currC];
-      const distFromCenter = calculateDistance(centerLat, centerLng, pt.lat, pt.lng);
-      if (distFromCenter <= radiusMeters * 1.05) {
-        ridgeLine.push([pt.lng, pt.lat]);
-      }
-
-      // Find best unvisited ridge neighbor
-      let bestNext: { r: number; c: number } | null = null;
-      let highestNeighborElev = -9999;
-      for (let dr = -1; dr <= 1; dr++) {
-        for (let dc = -1; dc <= 1; dc++) {
-          if (dr === 0 && dc === 0) continue;
-          const nr = currR + dr;
-          const nc = currC + dc;
-          if (nr >= 0 && nr < gridSize && nc >= 0 && nc < gridSize && !visitedRidge[nr][nc]) {
-            const isCand = ridgeCandidates.some(c => c.r === nr && c.c === nc);
-            if (isCand && elevationGrid[nr][nc] > highestNeighborElev) {
-              highestNeighborElev = elevationGrid[nr][nc];
-              bestNext = { r: nr, c: nc };
-            }
-          }
-        }
-      }
-
-      if (!bestNext) break;
-      currR = bestNext.r;
-      currC = bestNext.c;
-    }
-
-    if (ridgeLine.length >= 3) {
-      spatialFeatures.push({
-        type: 'Feature',
-        properties: {
-          layerType: 'ridge',
-          category: 'key-terrain',
-          title: `⛰️ سلسلة تلال وقمم حاكمة (خط تقسيم مياه)`,
-          color: '#d97706',
-          width: 2.5
-        },
-        geometry: {
-          type: 'LineString',
-          coordinates: ridgeLine
-        }
-      });
-    }
-  }
 
   // 8. Regional Sector Intelligence Context
   let sectorName = 'قطاع عمليات ميداني';