Fix elevation calculation and polar snowline threshold preventing unit movement

terrainmovementmanager.cpp

@@ -12,8 +12,8 @@ TerrainMovementConfig::TerrainMovementConfig()
       snowHeightKm(3.1f),
       polarSnowLineEnabled(true),
       polarSnowLineBaseKm(2.5f),
-      polarSnowFactorStart(0.40f),
-      polarSnowFactorEnd(0.85f),
+      polarSnowFactorStart(0.88f),
+      polarSnowFactorEnd(0.98f),
       uphillSlopeMultiplier(4.0f),
       downhillSlopeBonusMultiplier(2.0f),
       minStepCost(0.25f),
@@ -143,7 +143,7 @@ QString TerrainMovementManager::getTerrainType(int tx, int ty, Matrix2D<TerrainP
         return "water";
     }
 
-    float heightKm = (tp.height / 255.0f) * 3.5f + 1.0f;
+    float heightKm = (tp.height / 255.0f) * 3.5f;
 
     // 2. High peak snow
     if (heightKm >= m_config.snowHeightKm) {