Index: binaries/data/mods/public/maps/random/mainland.js
===================================================================
--- binaries/data/mods/public/maps/random/mainland.js
+++ binaries/data/mods/public/maps/random/mainland.js
@@ -149,11 +149,11 @@
 		[new SimpleObject(aBushMedium, 1, 2, 0, 2), new SimpleObject(aBushSmall, 2, 4, 0, 2)]
 	],
 	[
-		scaleByMapSize(16, 262),
-		scaleByMapSize(8, 131),
-		planetm * scaleByMapSize(13, 200),
-		planetm * scaleByMapSize(13, 200),
-		planetm * scaleByMapSize(13, 200)
+		scaleByMapAreaAbsolute(16),
+		scaleByMapAreaAbsolute(8),
+		planetm * scaleByMapAreaAbsolute(13),
+		planetm * scaleByMapAreaAbsolute(13),
+		planetm * scaleByMapAreaAbsolute(13)
 	],
 	avoidClasses(clForest, 0, clPlayer, 0, clHill, 0));
 
Index: binaries/data/mods/public/maps/random/rmgen/library.js
===================================================================
--- binaries/data/mods/public/maps/random/rmgen/library.js
+++ binaries/data/mods/public/maps/random/rmgen/library.js
@@ -80,6 +80,36 @@
 	return min + (max - min) * (g_MapSettings.Size - minMapSize) / (maxMapSize - minMapSize);
 }
 
+/**
+ * Interpolate quadratic between (min, minMapArea) and (max, maxMapArea) with respect to the mapSize.
+ * Default values set on the area of tiny and giant map sizes according to the map shape (square or circular).
+ */
+function scaleByMapArea(
+	min,
+	max,
+	minMapArea = g_MapSettings.CircularMap ? diskArea(64) : 16384,
+	maxMapArea = g_MapSettings.CircularMap ? diskArea(256) : 262144)
+{
+	return min + (max - min) *
+		((g_MapSettings.CircularMap ?
+		  diskArea(g_MapSettings.Size / 2) :
+		  g_MapSettings.Size * g_MapSettings.Size) - minMapArea) / (maxMapArea - minMapArea);
+}
+
+/**
+ * Interpolate quadraticly between (0,0) and (base, baseArea) with respect to the map size.
+ * @param base - Value we should attain at baseArea.
+ * @param disallowedArea - Area deducted from the map area.
+ * @param baseArea - Area at which the base value should be attained. Defaults to the map area of a tiny map of current shape (square or circular).
+ */
+function scaleByMapAreaAbsolute(
+	base,
+	disallowedArea = 0,
+	baseArea = g_MapSettings.CircularMap ? diskArea(64) : 16384)
+{
+	return scaleByMapArea(0, base, disallowedArea, baseArea + disallowedArea);
+}
+
 function randomPositionOnTile(tilePosition)
 {
 	return Vector2D.add(tilePosition, new Vector2D(randFloat(0, 1), randFloat(0, 1)));