diff --git a/main.js b/main.js
index 224a1fde..f9146b6f 100644
--- a/main.js
+++ b/main.js
@@ -1635,18 +1635,13 @@ function addZones(number = 1) {
       cellsArray.push(q);
       if (cellsArray.length > power) break;
 
-      try {
-        cells.c[q].forEach(e => {
-          if (used[e]) return;
-          if (cells.state[e] !== state.i) return;
-          used[e] = 1;
-          if (e % 4 !== 0 && !cells.c[e].some(c => cells.state[c] === neib)) return;
-          queue.push(e);
-        });
-      } catch (er) {
-        console.error('Error in rebel generation: ', q, cellsArray);
-        throw er;
-      }
+      cells.c[q].forEach(e => {
+        if (used[e]) return;
+        if (cells.state[e] !== state.i) return;
+        used[e] = 1;
+        if (e % 4 !== 0 && !cells.c[e].some(c => cells.state[c] === neib)) return;
+        queue.push(e);
+      });
     }
 
     const rebels = rw({Rebels: 5, Insurgents: 2, Mutineers: 1, Rioters: 1, Separatists: 1, Secessionists: 1, Insurrection: 2, Rebellion: 1, Conspiracy: 2});
diff --git a/modules/river-generator.js b/modules/river-generator.js
index 59a27468..957fe6fc 100644
--- a/modules/river-generator.js
+++ b/modules/river-generator.js
@@ -35,13 +35,11 @@ window.Rivers = (function () {
     TIME && console.timeEnd("generateRivers");
 
     function drainWater() {
-      const pixel2 = distanceScale * distanceScale
       //const MIN_FLUX_TO_FORM_RIVER = 10 * distanceScale;
       const MIN_FLUX_TO_FORM_RIVER = 30;
       const cellsNumberModifier = (pointsInput.dataset.cells / 10000) ** 0.25;
 
       const prec = grid.cells.prec;
-      // const area = c => pack.cells.area[c] * pixel2;
       const area = pack.cells.area;
       const land = cells.i.filter(i => h[i] >= 20).sort((a, b) => h[b] - h[a]);
       const lakeOutCells = Lakes.setClimateData(h);
diff --git a/modules/submap.js b/modules/submap.js
index f9b70bff..d46be5e9 100644
--- a/modules/submap.js
+++ b/modules/submap.js
@@ -1,17 +1,29 @@
 "use strict";
 /*
-Experimental submaping module
+Cell resampler module used by submapper and resampler (transform)
+main function: resample(options);
 */
 
 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, options) {
-    // generate new map based on an existing one (resampling parentMap)
-    // parentMap: {seed, grid, pack} from original map
-    // projection: map function from old to new coordinates or backwards
-    //  prj(x,y,direction:bool) -> [x',y']
+  function resample(parentMap, options) { /*
+    generate new map based on an existing one (resampling parentMap)
+    parentMap: {seed, grid, pack} from original map
+    options = {
+          projection: f(Number,Number)->[Number, Number]
+                      function to calculate new coordinates
+          inverse: g(Number,Number)->[Number, Number]
+                    inverse of f
+          depressRivers: Bool     carve out riverbeds?
+          smoothHeightMap: Bool   run smooth filter on heights
+          addLakesInDepressions:  call FMG original funtion on heightmap
+
+          lockMarkers: Bool       Auto lock all copied markers
+          lockBurgs: Bool         Auto lock all copied burgs
+      }
+    */
 
     const projection = options.projection;
     const inverse = options.inverse;