diff --git a/index.css b/index.css
index 4a7a1dd0..c1985428 100644
--- a/index.css
+++ b/index.css
@@ -1289,8 +1289,13 @@ div.states > div.biomeArea {
   cursor: pointer;
 }
 
+#picker text {
+	cursor: default;
+}
+
 #pickerHeader {
 	fill: #916e7f;
+	stroke: #5d4651;
 	cursor: move;
 }
 
@@ -1302,8 +1307,17 @@ div.states > div.biomeArea {
 	cursor: move !important;
 }
 
-#picker text {
-	cursor: default;
+#pickerCloseRect {
+	cursor: pointer;
+	fill: #916e7f;
+	stroke: #f8ffff;
+}
+
+#pickerCloseText {
+	fill: #f8ffff;
+  font-size: 10px;
+	font-family: Arial, Helvetica, sans-serif;
+	pointer-events: none;
 }
 
 #pickerControls line {
@@ -1322,6 +1336,20 @@ div.states > div.biomeArea {
 	stroke: #000000;
 }
 
+#pickerSpaces input {
+  height: 8px;
+  width: 16px;
+  font-size: smaller;
+	text-align: center;
+	-moz-appearance: textfield;
+}
+
+#pickerSpaces input::-webkit-inner-spin-button,
+#pickerSpaces input::-webkit-outer-spin-button {
+	-webkit-appearance: none;
+	margin: 0;
+}
+
 #pickerColors rect, #pickerHatches rect {
 	cursor: pointer;
 }
diff --git a/index.html b/index.html
index 0eaea9dc..7d32395e 100644
--- a/index.html
+++ b/index.html
@@ -1788,9 +1788,9 @@
 
         <div>
           <p>Cell info:</p>
-          <span>Coord: </span><span id="heightmapInfoX"></span>/<span id="heightmapInfoY"></span>
-          <span style="margin-left:8px">Cell: </span><span id="heightmapInfoCell"></span>
-          <span style="margin-left:8px">Height: </span><span id="heightmapInfoHeight"></span>
+          <span>Coord: </span><span id="heightmapInfoX"></span>/<span id="heightmapInfoY"></span><br>
+          <span>Cell: </span><span id="heightmapInfoCell"></span><br>
+          <span>Height: </span><span id="heightmapInfoHeight"></span>
         </div>
 
         <button data-tip="Finalize the heightmap and exit the edit mode" id="finalizeHeightmap" class="glow">Exit Customization</button>
@@ -2369,7 +2369,7 @@
         <button id="convertAutoHue" data-tip="Auto-assign colors based on hue (good to colored images)" class="icon-brush"></button>
         <button id="convertColorsMinus" data-tip="Reduce the number of colors. Minimal number is 3" class="icon-minus-squared"></button>
         <button id="convertColorsPlus" data-tip="Increase the number of colors. Maximum number is 256" class="icon-plus-squared"></button>
-        <input id="convertColors" value="12" style="display: none"/>
+        <input id="convertColors" value="18" style="display: none"/>
         <button id="convertComplete" data-tip="Complete the assignment. All unassigned colors will be considered as ocean" class="icon-check"></button>
       </div>
 
diff --git a/main.js b/main.js
index dbad159c..945f45be 100644
--- a/main.js
+++ b/main.js
@@ -391,7 +391,7 @@ function focusOn() {
   }
 
   const b = +params.get("burg");
-  if (b) {
+  if (b && pack.burgs[b]) {
     x = pack.burgs[b].x;
     y = pack.burgs[b].y;
   }
diff --git a/modules/ui/editors.js b/modules/ui/editors.js
index bf5037fb..4f544f4b 100644
--- a/modules/ui/editors.js
+++ b/modules/ui/editors.js
@@ -252,9 +252,13 @@ function clearLegend() {
 
 // draw color (fill) picker
 function createPicker() {
+  const pos = () => tip("Drag to change the picker position");
+  const cl = () => tip("Click to close the picker");
+  const closePicker = () => contaiter.style("display", "none");
+
   const contaiter = d3.select("body").append("svg").attr("id", "pickerContainer").attr("width", "100%").attr("height", "100%");
-  const curtain = contaiter.append("rect").attr("x", 0).attr("y", 0).attr("width", "100%").attr("height", "100%").attr("opacity", .2);
-  curtain.on("click", () => contaiter.style("display", "none")).on("mousemove", () => tip("Click to close the picker"));
+  contaiter.append("rect").attr("x", 0).attr("y", 0).attr("width", "100%").attr("height", "100%").attr("opacity", .2)
+    .on("mousemove", cl).on("click", closePicker);
   const picker = contaiter.append("g").attr("id", "picker").call(d3.drag().on("start", dragPicker));
 
   const controls = picker.append("g").attr("id", "pickerControls");
@@ -279,6 +283,24 @@ function createPicker() {
   controls.selectAll("line").on("click", clickPickerControl);
   controls.selectAll("circle").call(d3.drag().on("start", dragPickerControl));
 
+  const spaces = picker.append("foreignObject").attr("id", "pickerSpaces")
+    .attr("x", 4).attr("y", 20).attr("width", 303).attr("height", 20)
+    .on("mousemove", () => tip("Color value in different color spaces. Edit to change"));
+  const html = `
+  <label style="margin-right: 6px">HSL: 
+    <input type="number" id="pickerHSL_H" data-space="hsl" min=0 max=360 value="231">,
+    <input type="number" id="pickerHSL_S" data-space="hsl" min=0 max=100 value="70">, 
+    <input type="number" id="pickerHSL_L" data-space="hsl" min=0 max=100 value="70">
+  </label>
+  <label style="margin-right: 6px">RGB: 
+    <input type="number" id="pickerRGB_R" data-space="rgb" min=0 max=255 value="125">,
+    <input type="number" id="pickerRGB_G" data-space="rgb" min=0 max=255 value="142">, 
+    <input type="number" id="pickerRGB_B" data-space="rgb" min=0 max=255 value="232">
+  </label>
+  <label>HEX: <input type="text" id="pickerHEX"  data-space="hex" style="width:42px" autocorrect="off" spellcheck="false" value="#7d8ee8"></label>`;
+  spaces.node().insertAdjacentHTML('beforeend', html);
+  spaces.selectAll("input").on("change", changePickerSpace);
+
   const colors = picker.append("g").attr("id", "pickerColors").attr("stroke", "#333333");
   const hatches = picker.append("g").attr("id", "pickerHatches").attr("stroke", "#333333");
   const hatching = d3.selectAll("g#hatching > pattern");
@@ -287,12 +309,12 @@ function createPicker() {
   const clr = d3.range(number).map(i => d3.hsl(i/number*360, .7, .7).hex());
   clr.forEach(function(d, i) {
     colors.append("rect").attr("id", "picker_" + d).attr("fill", d).attr("class", i?"":"selected")
-      .attr("x", i*22+4).attr("y", 20).attr("width", 16).attr("height", 16);
+      .attr("x", i*22+4).attr("y", 40).attr("width", 16).attr("height", 16);
   });
 
   hatching.each(function(d, i) {
     hatches.append("rect").attr("id", "picker_" + this.id).attr("fill", "url(#" + this.id + ")")
-      .attr("x", i*22+4).attr("y", 41).attr("width", 16).attr("height", 16);
+      .attr("x", i*22+4).attr("y", 61).attr("width", 16).attr("height", 16);
   });
 
   colors.selectAll("rect").on("click", pickerFillClicked).on("mousemove", () => tip("Click to fill with the color"));
@@ -302,8 +324,10 @@ function createPicker() {
   const bbox = picker.node().getBBox();
   const width = bbox.width + 8;
   const height = bbox.height + 9;
-  const pos = () => tip("Drag to change the picker position");
-  picker.insert("rect", ":first-child").attr("x", 0).attr("y", 0).attr("width", width).attr("height", height).attr("fill", "#ffffff").on("mousemove", pos);
+
+  picker.insert("rect", ":first-child").attr("x", 0).attr("y", 0).attr("width", width).attr("height", height).attr("fill", "#ffffff").attr("stroke", "#5d4651").on("mousemove", pos);
+  picker.insert("text", ":first-child").attr("x", 291).attr("y", -11).attr("id", "pickerCloseText").text("✖");
+  picker.insert("rect", ":first-child").attr("x", 288).attr("y", -21).attr("id", "pickerCloseRect").attr("width", 14).attr("height", 14).on("mousemove", cl).on("click", closePicker);
   picker.insert("text", ":first-child").attr("x", 12).attr("y", -10).attr("id", "pickerLabel").text("Color Picker").on("mousemove", pos);
   picker.insert("rect", ":first-child").attr("x", 0).attr("y", -30).attr("width", width).attr("height", 30).attr("id", "pickerHeader").on("mousemove", pos);
   picker.attr("transform", `translate(${(svgWidth-width)/2},${(svgHeight-height)/2})`);
@@ -314,6 +338,25 @@ function updateSelectedRect(fill) {
   document.getElementById("picker").querySelector("rect[fill='"+fill+"']").classList.add("selected");
 }
 
+function updateSpaces() {
+  // hsl
+  const h = getPickerControl(pickerH, 360);
+  const s = getPickerControl(pickerS, 1);
+  const l = getPickerControl(pickerL, 1);
+  pickerHSL_H.value = rn(h);
+  pickerHSL_S.value = rn(s * 100); // multiplied by 100
+  pickerHSL_L.value = rn(l * 100); // multiplied by 100
+
+  // rgb
+  const rgb = d3.color(d3.hsl(h, s, l));
+  pickerRGB_R.value = rgb.r;
+  pickerRGB_G.value = rgb.g;
+  pickerRGB_B.value = rgb.b;
+
+  // hex
+  pickerHEX.value = rgb.hex();
+}
+
 function updatePickerColors() {
   const colors = d3.select("#picker > #pickerColors").selectAll("rect");
   const number = colors.size();
@@ -339,6 +382,7 @@ function openPicker(fill, callback) {
     if (!isNaN(hsl.h)) setPickerControl(pickerH, hsl.h, 360);
     if (!isNaN(hsl.s)) setPickerControl(pickerS, hsl.s, 1);
     if (!isNaN(hsl.l)) setPickerControl(pickerL, hsl.l, 1);
+    updateSpaces();
     updatePickerColors();
   }
 
@@ -380,13 +424,20 @@ function dragPicker() {
 }
 
 function pickerFillClicked() {
-  updateSelectedRect(this.getAttribute("fill"));
+  const fill = this.getAttribute("fill");
+  updateSelectedRect(fill);
   openPicker.updateFill();
+
+  const hsl = d3.hsl(fill);
+  if (isNaN(hsl.h)) return; // not a color
+  setPickerControl(pickerH, hsl.h, 360);
+  updateSpaces();
 }
 
 function clickPickerControl() {
   const min = this.getScreenCTM().e;
   this.nextSibling.setAttribute("cx", d3.event.x - min);
+  updateSpaces();
   updatePickerColors();
   openPicker.updateFill();
 }
@@ -398,11 +449,33 @@ function dragPickerControl() {
   d3.event.on("drag", function() {
     const x = Math.max(Math.min(d3.event.x, max), min);
     this.setAttribute("cx", x);
+    updateSpaces();
     updatePickerColors();
     openPicker.updateFill();
   });
 }
 
+function changePickerSpace() {
+  const valid = this.checkValidity();
+  if (!valid) {tip("You must provide a correct value", false, "error"); return;}
+
+  const space = this.dataset.space;
+  const i = Array.from(this.parentNode.querySelectorAll("input")).map(input => input.value); // inputs
+  const fill = space === "hex" ? d3.rgb(this.value) 
+    : space === "rgb" ? d3.rgb(i[0], i[1], i[2]) 
+    : d3.hsl(i[0], i[1]/100, i[2]/100);
+
+  const hsl = d3.hsl(fill);
+  if (isNaN(hsl.l)) {tip("You must provide a correct value", false, "error"); return;}
+  if (!isNaN(hsl.h)) setPickerControl(pickerH, hsl.h, 360);
+  if (!isNaN(hsl.s)) setPickerControl(pickerS, hsl.s, 1);
+  if (!isNaN(hsl.l)) setPickerControl(pickerL, hsl.l, 1);
+
+  updateSpaces();
+  updatePickerColors();
+  openPicker.updateFill();
+}
+
 // remove all fogging
 function unfog() {
   defs.select("#fog").selectAll("path").remove();
diff --git a/modules/ui/heightmap-editor.js b/modules/ui/heightmap-editor.js
index c8f3035a..2738c790 100644
--- a/modules/ui/heightmap-editor.js
+++ b/modules/ui/heightmap-editor.js
@@ -82,9 +82,9 @@ function editHeightmap() {
     heightmapInfoX.innerHTML = rn(p[0]);
     heightmapInfoY.innerHTML = rn(p[1]);
     heightmapInfoCell.innerHTML = cell;
-    heightmapInfoHeight.innerHTML = grid.cells.h[cell];
-
-    tip("Height: " + getFriendlyHeight(grid.cells.h[cell]));
+    const h = grid.cells.h[cell];
+    heightmapInfoHeight.innerHTML = `${h} (${getFriendlyHeight(h)})`;
+    if (tooltip.dataset.main) showMainTip();
 
     // move radius circle if drag mode is active
     const pressed = document.querySelector("#brushesButtons > button.pressed");
@@ -218,6 +218,14 @@ function editHeightmap() {
       if (grid.cells.h[i] < 20) grid.cells.h[i] = 20;
     }
 
+    // save culture centers x and y to restore center cell id after re-graph
+    for (const c of pack.cultures) {
+      if (!c.i || c.removed) continue;
+      const p = pack.cells.p[c.center];
+      c.x = p[0];
+      c.y = p[1];
+    }
+
     markFeatures();
     OceanLayers();
     calculateTemperatures();
@@ -299,6 +307,11 @@ function editHeightmap() {
       else {p.center = provCells[0]; p.burg = pack.cells.burg[p.center];}
     }
 
+    for (const c of pack.cultures) {
+      if (!c.i || c.removed) continue;
+      c.center = findCell(c.x, c.y);
+    }
+
     BurgsAndStates.drawStateLabels();
     drawStates();
     drawBorders();
@@ -883,7 +896,12 @@ function editHeightmap() {
     setOverlayOpacity(0);
     
     document.getElementById("convertImageLoad").classList.add("glow"); // add glow effect
-    tip('Image Converter is opened. Upload the image and assign the colors to desired heights', true); // main tip
+    tip('Image Converter is opened. Upload the image and assign the colors to desired heights', true, "warn"); // main tip
+
+    // remove all heights
+    grid.cells.h = new Uint8Array(grid.cells.i.length);
+    terrs.selectAll("*").remove();
+    updateHistory();
 
     if (modules.openImageConverter) return;
     modules.openImageConverter = true;
@@ -944,8 +962,8 @@ function editHeightmap() {
       colorsUnassigned.style.display = "block";
       colorsAssigned.style.display = "none";
 
-      const gridColors = grid.points.map(function(p) {
-        const x = Math.floor(p[0]), y = Math.floor(p[1]);
+      const gridColors = grid.points.map(p => {
+        const x = Math.floor(p[0]-.01), y = Math.floor(p[1]-.01);
         const i = (x + y * graphWidth) * 4;
         const r = data[i], g = data[i+1], b = data[i+2];
         return [r, g, b];
@@ -961,7 +979,7 @@ function editHeightmap() {
           return clr;
         }).on("click", mapClicked);
 
-      const unassigned = [...usedColors].sort((a, b) => d3.lab(a).b - d3.lab(b).b);
+      const unassigned = [...usedColors].sort((a, b) => d3.lab(a).l - d3.lab(b).l);
       const unassignedContainer = d3.select("#colorsUnassigned");
       unassignedContainer.selectAll("div").data(unassigned).enter().append("div")
         .attr("data-color", i => i).style("background-color", i => i)
@@ -1002,7 +1020,7 @@ function editHeightmap() {
       const height = +this.getAttribute("data-color");
       const rgb = color(1 - height/100);
 
-      const selectedColor = imageConverter.querySelector("div.selectedColor");      
+      const selectedColor = imageConverter.querySelector("div.selectedColor");
       selectedColor.style.backgroundColor = rgb;
       selectedColor.setAttribute("data-color", rgb);
       selectedColor.setAttribute("data-height", height);
@@ -1027,19 +1045,19 @@ function editHeightmap() {
       unassigned.forEach(function(el) {
         const colorFrom = el.getAttribute("data-color");
         const lab = d3.lab(colorFrom);
-        const normalized = type === "hue" ? rn(normalize(lab.b + lab.a / 2, -50, 200), 2) : rn(normalize(lab.l, 0, 100), 2);
+        const normalized = type === "hue" ? rn(normalize(lab.b + lab.a / 2, -50, 200), 2) : rn(normalize(lab.l, -15, 100), 2);
         const colorTo = color(1 - normalized);
         const heightTo = normalized * 100;
-        
+
         terrs.selectAll("polygon[fill='" + colorFrom + "']").attr("fill", colorTo).attr("data-height", heightTo);
         el.style.backgroundColor = colorTo;
         el.setAttribute("data-color", colorTo);
         el.setAttribute("data-height", heightTo);
-        colorsAssigned.appendChild(el);        
+        colorsAssigned.appendChild(el);
       });
       
       colorsAssigned.style.display = "block";
-      colorsUnassigned.style.display = "none";   
+      colorsUnassigned.style.display = "none";
     }
     
     function changeConvertColorsNumber(change) {
diff --git a/modules/utils.js b/modules/utils.js
index 55f8efe7..ea6ed102 100644
--- a/modules/utils.js
+++ b/modules/utils.js
@@ -24,13 +24,14 @@ function getBoundaryPoints(width, height, spacing) {
 // get points on a regular square grid and jitter them a bit
 function getJitteredGrid(width, height, spacing) {
   const radius = spacing / 2; // square radius
-  const jittering = radius * 0.9; // max deviation
-  const jitter = function() {return Math.random() * 2 * jittering - jittering;};
+  const jittering = radius * .9; // max deviation
+  const jitter = () => Math.random() * 2 * jittering - jittering;
+
   let points = [];
   for (let y = radius; y < height; y += spacing) {
     for (let x = radius; x < width; x += spacing) {
-      let xj = rn(x + jitter(), 2);
-      let yj = rn(y + jitter(), 2);
+      const xj = Math.min(rn(x + jitter(), 2), width);
+      const yj = Math.min(rn(y + jitter(), 2), height);
       points.push([xj, yj]);
     }
   }