diff --git a/index.html b/index.html
index 2d4407de..e4cd8ea2 100644
--- a/index.html
+++ b/index.html
@@ -3685,10 +3685,6 @@
         <input id="submapCopyRivers" class="checkbox" type="checkbox">
         <label for="submapCopyRivers" class="checkbox-label">Rivers</label>
       </div>
-      <div data-tip="Copy markers from the original map. Regenerate markers if not checked." >
-        <input id="submapCopyMarkers" class="checkbox" type="checkbox" checked>
-        <label for="submapCopyMarkers" class="checkbox-label">Markers</label>
-      </div>
       <div data-tip="Copy Zones from the original map. Regenerate Zones if not checked." class="disabled">
         <input id="submapCopyZones" class="checkbox" type="checkbox" disabled>
         <label for="submapCopyZones" class="checkbox-label">Zones</label>
@@ -3698,6 +3694,17 @@
         <label for="submapCopyRoads" class="checkbox-label">Roads</label>
       </div>
       <hr />
+
+      <p>Lock remapped items for:</p>
+      <div data-tip="Lock all markers copied from the original map." >
+        <input id="submapLockMarkers" class="checkbox" type="checkbox" checked>
+        <label for="submapLockMarkers" class="checkbox-label">Markers</label>
+      </div>
+      <div data-tip="Lock all burgs copied from the original map." >
+        <input id="submapLockBurgs" class="checkbox" type="checkbox" checked>
+        <label for="submapLockBurgs" class="checkbox-label">Burgs (cities)</label>
+      </div>
+
       <p>Extra / experimental features:</p>
       <div data-tip="Rivers on the parent map errode land (helps to get similar river network.)" >
         <input id="submapDepressRivers" class="checkbox" type="checkbox">
diff --git a/modules/submap.js b/modules/submap.js
index 7e562aa2..b3ca8b2b 100644
--- a/modules/submap.js
+++ b/modules/submap.js
@@ -5,6 +5,7 @@ Experimental submaping module
 
 window.Submap = (function () {
   const isWater = (map, id) => map.grid.cells.h[map.pack.cells.g[id]] < 20? true: false;
+  const inMap = (x,y) => x>0 && x<graphWidth && y>0 && y<graphHeight;
 
   function resample(parentMap, projection, options) {
     // generate new map based on an existing one (resampling parentMap)
@@ -290,13 +291,21 @@ window.Submap = (function () {
     }
     Military.redraw();
 
-    stage("markers and zones (if requested).");
-    if (!options.copyMarkers) Markers.generate();
-    else {
-      // TODO
-      pack.markers = [];
+    stage("Copying markers.");
+    for (const m of pack.markers) {
+      const [x, y] = projection(m.x, m.y, false);
+      if (!inMap(x, y)) {
+        Markers.deleteMarker(m.i);
+      } else {
+        m.x = x;
+        m.y = y;
+        m.cell = findCell(x, y);
+        if (options.lockMarkers) m.lock = true;
+      }
     }
-    
+    drawMarkers();
+
+    stage("Regenerating Zones.");
     if (!options.copyZones) addZones();
     Names.getMapName();
     stage("Submap done.");
@@ -327,7 +336,6 @@ window.Submap = (function () {
   }
 
   function copyBurgs(parentMap, projection, options) {
-    const inMap = (x,y) => x>0 && x<graphWidth && y>0 && y<graphHeight;
     const cells = pack.cells;
     const childMap = { grid, pack }
     const isCoast = c => cells.t[c] === 1
@@ -379,7 +387,7 @@ window.Submap = (function () {
         b.cell = cityCell;
         [b.x, b.y] = cells.p[cityCell];
       }
-      b.lock = true;
+      if (!b.lock) b.lock = options.lockBurgs;
       pack.cells.burg[b.cell] = id;
       if (options.promoteTown) b.capital = 1;
     });
diff --git a/modules/ui/submap.js b/modules/ui/submap.js
index 2ee0181b..084c594b 100644
--- a/modules/ui/submap.js
+++ b/modules/ui/submap.js
@@ -22,10 +22,12 @@ const generateSubmap = debounce(async function () {
   const checked = id => Boolean(document.getElementById(id).checked)
   const options = {
     copyBurgs: checked("submapCopyBurgs"),
-    copyMarkers: checked("submapCopyMarkers"),
     copyZones: checked("submapCopyZones"),
-    copyZones: checked("submapCopyRivers"),
-    copyZones: checked("submapCopyRoads"),
+    copyRivers: checked("submapCopyRivers"),
+    copyRoads: checked("submapCopyRoads"),
+
+    lockMarkers: checked("submapLockMarkers"),
+    lockBurgs: checked("submapLockBurgs"),
 
     depressRivers: checked("submapDepressRivers"),
     addLakesInDepressions: checked("submapAddLakeInDepression"),