diff --git a/index.html b/index.html
index 0b817396..d648ecfd 100644
--- a/index.html
+++ b/index.html
@@ -1313,7 +1313,7 @@
 
         <button id="configureWorld" data-tip="Click to open world configurator to setup map position on Globe and World climate" onclick="editWorld()">Configure World</button>
         <button id="openSubmapOptions" data-tip="Click to generate new (sub)map from the current viewport" onclick="openSubmapOptions()">Submap</button>
-        <button id="optionsReset" data-tip="Click to restore default options (page will be reloaded)" onclick="restoreDefaultOptions()">Reset to defaults</button>
+        <button id="optionsReset" data-tip="Click to restore default options (page will be reloaded)" onclick="restoreDefaultOptions()">Reset</button>
 
       </div>
 
@@ -3507,7 +3507,7 @@
       <p style="font-style: italic; color: red">Original map will be destroyed! Don't forget to save your work!</p>
       <div id="submapStage"></div>
       <div id="submapProgress"></div>
-      <button id="start" data-tip="Start submap resampling" class="options glow" onclick="generateSubmap()">Ok</button>
+      <button id="start" data-tip="Start submap resampling" class="options glow" onclick="generateSubmap()">Generate</button>
     </div>
 
     <div id="alert" style="display: none" class="dialog">
diff --git a/modules/submap.js b/modules/submap.js
index 7a529ab6..6f4cb421 100644
--- a/modules/submap.js
+++ b/modules/submap.js
@@ -50,7 +50,7 @@ window.Submap = (function () {
       grid.cells.h[id] = gridCells.h[cid];
       grid.cells.temp[id] = gridCells.temp[cid];
       grid.cells.prec[id] = gridCells.prec[cid];
-      id%50 || progress(id * 100.0 / grid.points.length)
+      id%50 || progress(id * 100.0 / grid.points.length);
     })
     // TODO: add smooth/noise function for h, temp, prec n times
 
@@ -112,32 +112,42 @@ window.Submap = (function () {
     // Cultures.expand();
     // TODO: update culture centers
 
-    // transfer states and burgs. filter states without land
-    const validStates = new Set(pack.cells.state)
-    console.log(validStates);
-    pack.states = baseState.pack.states;
-    console.log(pack.states)
-    pack.validStates = pack.states.filter(s => validStates.has(s.i))
+    // transfer states and burgs. mark states without land as removed.
+    const validStates = new Set(pack.cells.state);
+    pack.states = baseState.pack.states
+    pack.states.forEach(s => {
+      if (!validStates.has(s.i)) s.removed=true;
+    });
 
     // BurgsAndStates.generate();
     // Religions.generate();
     // BurgsAndStates.defineStateForms();
-    BurgsAndStates.generateProvinces();
     // BurgsAndStates.defineBurgFeatures();
 
-    // update burg list
-    //const validBurgs = new Set(pack.cells.burgs);
+    // remove non-existent burgs
     pack.burgs = baseState.pack.burgs
-    //  .filter(b => validBurgs.has(b.i))
+
+
+    const [[xmin, ymin], [xmax, ymax]] = getViewBoxExtent();
+    const inMap = (x,y) => x>xmin && x<xmax && y>ymin && y<ymax;
 
     // remap burgs to the best new cell
     pack.burgs.forEach((b, i) => {
-      [b.x, b.y] = projection(b.x, b.y);
+      [b.x,b.y] = projection(b.x, b.y);
+      if (!inMap(b.x,b.y)) {
+        // out-of-map (removed) burgs' cell will be undefined
+        console.log('burg is out of map:', b)
+        b.removed=true;
+        b.cell = undefined;
+        return;
+      }
       b.cell = findCell(b.x, b.y);
       pack.cells.burg[b.cell] = i;
       // TODO: move port burgs to coast b.x, b.y,
     });
 
+    BurgsAndStates.generateProvinces();
+
     drawStates();
     drawBorders();
     BurgsAndStates.drawStateLabels();
@@ -155,5 +165,6 @@ window.Submap = (function () {
     INFO && console.groupEnd("Generated Map " + seed);
   }
 
+  // export
   return { resample }
 })();
diff --git a/modules/ui/submap.js b/modules/ui/submap.js
index 7dce33e5..108ffde8 100644
--- a/modules/ui/submap.js
+++ b/modules/ui/submap.js
@@ -27,8 +27,8 @@ const generateSubmap = debounce(function (x, y, w, h) {
     progress: p => progressUI.innerHTML = p,
   }
 
+  const [[x0, y0], [x1, y1]] = getViewBoxExtent();
   const projection = (x, y) => {
-    const [[x0, y0], [x1, y1]] = getViewBoxExtent();
     return [x * (x1-x0) / graphWidth + x0, y * (y1-y0) / graphHeight + y0]
   }