diff --git a/src/main/java/de/rondiplomatico/nds/NDSEnvelope.java b/src/main/java/de/rondiplomatico/nds/NDSEnvelope.java
index cda7555..eb1a834 100644
--- a/src/main/java/de/rondiplomatico/nds/NDSEnvelope.java
+++ b/src/main/java/de/rondiplomatico/nds/NDSEnvelope.java
@@ -47,40 +47,40 @@ public NDSCoordinate getNorthWest() {
     }
     
     public int[] getMasterTileInfo(int maxLevels) {
-        NDSCoordinate point0                 = getSouthWest();
-        NDSCoordinate point1                 = getSouthEast();
-        NDSCoordinate point2                 = getNorthEast();
-        NDSCoordinate point3                 = getNorthWest();
+        NDSCoordinate point0                = getSouthWest();
+        NDSCoordinate point1                = getSouthEast();
+        NDSCoordinate point2                = getNorthEast();
+        NDSCoordinate point3                = getNorthWest();
         return getMasterTileInfo(point0, point1, point2, point3, maxLevels);
     }
     
     public int[] getMasterTileInfo(NDSCoordinate point0, NDSCoordinate point1, NDSCoordinate point2, NDSCoordinate point3, int maxLevels) {
         int masterTileLevel                 = -1;
-        int masterTileID                     = -1;
+        int masterTileID                    = -1;
         for (int li = 0; li < maxLevels; li++) {
-            NDSTile currTile0                = new NDSTile(li, point0);
-            NDSTile currTile1                = new NDSTile(li, point1);
-            NDSTile currTile2                = new NDSTile(li, point2);
-            NDSTile currTile3                = new NDSTile(li, point3);
+            NDSTile currTile0               = new NDSTile(li, point0);
+            NDSTile currTile1               = new NDSTile(li, point1);
+            NDSTile currTile2               = new NDSTile(li, point2);
+            NDSTile currTile3               = new NDSTile(li, point3);
             int currTileID0                 = currTile0.getTileNumber();
             int currTileID1                 = currTile1.getTileNumber();
             int currTileID2                 = currTile2.getTileNumber();
             int currTileID3                 = currTile3.getTileNumber();
-            boolean singleTileID             = (currTileID0 == currTileID1) && (currTileID0 == currTileID2) && (currTileID0 == currTileID3);
+            boolean singleTileID            = (currTileID0 == currTileID1) && (currTileID0 == currTileID2) && (currTileID0 == currTileID3);
             // if at least one tile ID is different, we discard the tile IDs and keep our previously detected tile ID (i.e. on the previous level)
             if(!singleTileID) {
                 break;
             }
             // store tile info
             masterTileLevel                 = li;
-            masterTileID                     = currTileID0;
+            masterTileID                    = currTileID0;
         }
         // check if valid result
         if (masterTileID == -1) {
             System.out.println(">>>ERROR: Invalid master tile ID.");
             System.exit(1);
         }
-        int[] masterTileInfo                 = {masterTileLevel, masterTileID};
+        int[] masterTileInfo                = {masterTileLevel, masterTileID};
         return masterTileInfo;
     }
 }
\ No newline at end of file
diff --git a/src/main/java/de/rondiplomatico/nds/polygon.java b/src/main/java/de/rondiplomatico/nds/polygon.java
index bff0566..8865b73 100644
--- a/src/main/java/de/rondiplomatico/nds/polygon.java
+++ b/src/main/java/de/rondiplomatico/nds/polygon.java
@@ -247,18 +247,18 @@ public static double[][] refinePolygon(int level, double[][] polygonCoordinates,
     
     public static int[] getTileNumbersOnLevel(int level, double[][] polygonCoordinates){
         int numCoord                                = polygonCoordinates.length;
-        int[] tileNumbers                               = new int[numCoord];
+        int[] tileNumbers                           = new int[numCoord];
         // loop over all coordinates to get map tile IDs
         for (int idx = 0; idx < numCoord; idx++) {
-            NDSCoordinate currCoord                 = new NDSCoordinate(polygonCoordinates[idx][1], polygonCoordinates[idx][0]);
+            NDSCoordinate currCoord                 = new NDSCoordinate(polygonCoordinates[idx][0], polygonCoordinates[idx][1]);
             NDSTile currTile                        = new NDSTile(level, currCoord);
-            tileNumbers[idx]                            = currTile.getTileNumber();
+            tileNumbers[idx]                        = currTile.getTileNumber();
         }
         return tileNumbers;
     }
     
     public static int[] getUniqueTileNumbersOnLevel(int level, double[][] polygonCoordinates){
-        int[] tileNumbers                               = getTileNumbersOnLevel(level, polygonCoordinates);
+        int[] tileNumbers                           = getTileNumbersOnLevel(level, polygonCoordinates);
         return IntStream.of(tileNumbers).distinct().toArray();
     }
 }