diff --git a/src/util/AreaMap2D.hpp b/src/util/AreaMap2D.hpp
index 547b05b4..1c3041be 100644
--- a/src/util/AreaMap2D.hpp
+++ b/src/util/AreaMap2D.hpp
@@ -6,16 +6,17 @@
 #include <glm/glm.hpp>
 
 namespace util {
-    template<class T>
-    using OutCallback = std::function<void(const T&)>;
 
     template<class T, typename TCoord=int>
     class AreaMap2D {
+    public:
+        using OutCallback = std::function<void(const T&)>;
+    private:
         TCoord offsetX, offsetY;
         TCoord sizeX, sizeY;
         std::vector<T> firstBuffer;
         std::vector<T> secondBuffer;
-        OutCallback<T> outCallback;
+        OutCallback outCallback;
 
         size_t valuesCount = 0;
     
@@ -93,7 +94,7 @@ namespace util {
             return true;
         }
 
-        void setOutCallback(const OutCallback<T>& callback) {
+        void setOutCallback(const OutCallback& callback) {
             outCallback = callback;
         }
 
diff --git a/src/world/generator/SurroundMap.cpp b/src/world/generator/SurroundMap.cpp
index e54da0e0..fd31d3e7 100644
--- a/src/world/generator/SurroundMap.cpp
+++ b/src/world/generator/SurroundMap.cpp
@@ -4,114 +4,25 @@
 #include <cstring>
 #include <stdexcept>
 
-void SurroundMap::resetMarks() {
-    for (auto& [_, entry] : entries) {
-        entry.marked = false;
-    }
+SurroundMap::SurroundMap(int loadDistance, ubyte maxLevel) 
+    : areaMap((loadDistance + maxLevel) * 2 + 1, 
+              (loadDistance + maxLevel) * 2 + 1),
+      levelCallbacks(maxLevel),
+      maxLevel(maxLevel) 
+{}
+
+void SurroundMap::setLevelCallback(int level, LevelCallback callback) {
+    levelCallbacks.at(level) = callback;
 }
 
-bool SurroundMap::createEntry(const glm::ivec2& origin) {
-    auto& entry = entries[origin];
-    if (entry.confirmed) {
-        return false;
-    }
-    entry.confirmed = true;
-
-    // calculate initial number of surrounding entries (any level)
-    int bitOffset = 0;
-    for (int y = -1; y <= 1; y++) {
-        for (int x = -1; x <= 1; x++) {
-            if (x == y && x == 0) {
-                continue;
-            }
-            const auto& found = entries.find(origin + glm::ivec2(x, y));
-            if (found != entries.end()) {
-                entry.surrounding |= (1 << bitOffset);
-                if (found->second.level == 0) {
-                    found->second.surrounding |= (1 << (7 - bitOffset));
-                }
-            }
-            bitOffset++;
-        }
-    }
-    return true;
+void SurroundMap::setOutCallback(util::AreaMap2D<ubyte>::OutCallback callback) {
+    areaMap.setOutCallback(callback);
 }
 
-std::vector<glm::ivec2> SurroundMap::upgrade() {
-    std::vector<glm::ivec2> expansion;
-    std::queue<glm::ivec2> expanding;
-    for (const auto& [pos, entry] : entries) {
-        if (entry.confirmed && entry.surrounding != 0xFF) {
-            expanding.push(pos);
-        }
-    }
-    while (!expanding.empty()) {
-        assert(expanding.size() < 64);
-
-        glm::ivec2 pos = expanding.front();
-        expanding.pop();
-
-        const auto& found = entries.find(pos);
-        assert(found != entries.end() && "concurrent modification");
-
-        auto& entry = found->second;
-        int uplevelSurrounding = 0;
-        int bitOffset = 0;
-        for (int y = -1; y <= 1; y++) {
-            for (int x = -1; x <= 1; x++) {
-                if (x == y && x == 0) {
-                    continue;
-                }
-                glm::ivec2 npos = {pos.x+x, pos.y+y};
-                const auto& nfound = entries.find(npos);
-                
-                if (entry.surrounding & (1 << bitOffset)) {
-                    auto& nentry = nfound->second;
-                    if (nentry.level > entry.level) {
-                        uplevelSurrounding |= (1 << bitOffset);
-                    }
-                    bitOffset++;
-                    continue;
-                }
-                if (entry.level == 0) {
-                    // neighbour entry does not exist
-                    createEntry(npos);
-                    expansion.push_back(npos);
-                } else{
-                    assert(nfound != entries.end() && "invalid map state");
-                    if (nfound->second.level == entry.level + 1) {
-                        nfound->second.surrounding |= (1 << (7 - bitOffset));
-                        expanding.push(npos);
-                    }
-                }
-                bitOffset++;
-            }
-        }
-        // level up
-        entry.surrounding = uplevelSurrounding;
-        entry.level++;
-    }
-    return expansion;
+void SurroundMap::completeAt(int x, int y) {
+    // TODO
 }
 
-void SurroundMap::getLevels(unsigned char* out, int width, int height, int ox, int oy) const {
-    std::memset(out, 0, width * height);
-    for (const auto& [pos, entry] : entries) {
-        int x = pos.x - ox;
-        int y = pos.y - oy;
-        if (x < 0 || x >= width || y < 0 || y >= height) {
-            continue;
-        }
-
-        int surroundNum = 0;
-        for (int i = 0; i < 8; i++) {
-            if (entry.surrounding & (1 << i)) {
-                surroundNum++;
-            }
-        }
-        if (surroundNum) {
-            out[y * width + x] = surroundNum + 1;
-        }
-        out[y * width + x] = entry.level + 1;
-    }
+void SurroundMap::setCenter(int x, int y) {
+    areaMap.setCenter(x, y);
 }
diff --git a/src/world/generator/SurroundMap.hpp b/src/world/generator/SurroundMap.hpp
index f8bca041..3a99817e 100644
--- a/src/world/generator/SurroundMap.hpp
+++ b/src/world/generator/SurroundMap.hpp
@@ -5,43 +5,23 @@
 #define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/hash.hpp>
 
+#include "typedefs.hpp"
+#include "util/AreaMap2D.hpp"
+
 class SurroundMap {
-    struct Entry {
-        /// @brief Level is increased when all surrounding (8) entries having
-        // greather or equal confirmed level
-        int level = 0;
-        /// @brief bits storing surrounding entries having greather or equal
-        /// confirmed level.
-        /// 0 - is x=-1,y=-1 offset, 1 is x=0,y=-1, ... 7 is x=1,y=1
-        /// (Prevents extra access to the entries hashmap)
-        uint8_t surrounding = 0x0;
-        /// @brief level confirmed status (entry is ready to expand)
-        bool confirmed = false;
-        /// @brief mark used on sweep event (extra isles garbage collection)
-        bool marked = false;
-    };
-    std::unordered_map<glm::ivec2, Entry> entries;
 public:
-    /// @brief Reset all isles marks
-    void resetMarks();
+    using LevelCallback = std::function<void(ubyte)>;
+private:
+    util::AreaMap2D<ubyte> areaMap;
+    std::vector<LevelCallback> levelCallbacks;
+    ubyte maxLevel;
+public:
+    SurroundMap(int loadDistance, ubyte maxLevel);
 
-    /// @brief Mark all connected entries
-    /// @param origin origin point
-    void markIsle(const glm::ivec2& origin);
+    void setLevelCallback(int level, LevelCallback callback);
+    void setOutCallback(util::AreaMap2D<ubyte>::OutCallback callback);
 
-    /// @brief Erase all non-marked isles
-    /// @return erased entries positions
-    std::vector<glm::ivec2> sweep();
+    void completeAt(int x, int y);
 
-    /// @brief Attempt to upgrade all confirmed entries with specified level
-    /// @param level target entries level
-    /// @return All upgraded entries positions 
-    std::vector<glm::ivec2> upgrade();
-    
-    /// @brief Create entry if does not exist
-    /// @param origin entry position
-    /// @return true if new entry has been created
-    bool createEntry(const glm::ivec2& origin);
-
-    void getLevels(unsigned char* out, int width, int height, int ox, int oy) const;
+    void setCenter(int x, int y);
 };
diff --git a/test/world/generator/SurroundMap.cpp b/test/world/generator/SurroundMap.cpp
index b9e0bbb2..dc29ea03 100644
--- a/test/world/generator/SurroundMap.cpp
+++ b/test/world/generator/SurroundMap.cpp
@@ -3,11 +3,5 @@
 #include "world/generator/SurroundMap.hpp"
 
 TEST(SurroundMap, InitTest) {
-    int w = 8;
-    int h = 8;
-
-    SurroundMap map;
-    map.createEntry({w/2, h/2});
-    map.createEntry({w/2+1, h/2+1});
-    EXPECT_EQ(map.upgrade().size(), 12);
+    SurroundMap map(50, 8);
 }