diff --git a/javascript/exampleData/Shapefiles/Arealdekke_klippa.zip b/javascript/exampleData/Shapefiles/Arealdekke_klippa.zip
deleted file mode 100644
index 42c7449c852b90b1dd5f7a88f07af5dc04301644..0000000000000000000000000000000000000000
Binary files a/javascript/exampleData/Shapefiles/Arealdekke_klippa.zip and /dev/null differ
diff --git a/javascript/exampleData/Shapefiles/Bygg&Anlegg_f_klippa.zip b/javascript/exampleData/Shapefiles/Bygg&Anlegg_f_klippa.zip
deleted file mode 100644
index 5b4a2015dff5eeecfba76f59dfb51e2f2f78f701..0000000000000000000000000000000000000000
Binary files a/javascript/exampleData/Shapefiles/Bygg&Anlegg_f_klippa.zip and /dev/null differ
diff --git a/javascript/exampleData/Shapefiles/Bygg&Anlegg_l_klippa.zip b/javascript/exampleData/Shapefiles/Bygg&Anlegg_l_klippa.zip
deleted file mode 100644
index d907438652000af4e3802dc85ff93aab0f31eb32..0000000000000000000000000000000000000000
Binary files a/javascript/exampleData/Shapefiles/Bygg&Anlegg_l_klippa.zip and /dev/null differ
diff --git a/javascript/exampleData/Shapefiles/Samferdsel_klippa.zip b/javascript/exampleData/Shapefiles/Samferdsel_klippa.zip
deleted file mode 100644
index 3ec9bcdbdaf7c4a9359fe8d0637959dbd1fbdbda..0000000000000000000000000000000000000000
Binary files a/javascript/exampleData/Shapefiles/Samferdsel_klippa.zip and /dev/null differ
diff --git a/javascript/exampleData/TrainingCenters.geojson b/javascript/exampleData/TrainingCenters.geojson
deleted file mode 100644
index 06c104bab3ed55bd0c8b110c2f39e68a3e70fdc8..0000000000000000000000000000000000000000
--- a/javascript/exampleData/TrainingCenters.geojson
+++ /dev/null
@@ -1,33 +0,0 @@
-{
-    "type": "FeatureCollection",
-    "properties": {"name": "Training centers"},
-    "features": [
-        {
-            "type": "Feature",
-            "properties": {"name": "SIT Gløshaugen"},
-            "geometry": {
-                "type": "Polygon",
-                "coordinates": [[
-                    [10.403855, 63.421078],
-                    [10.404845, 63.421427],
-                    [10.40556, 63.421042],
-                    [10.404572, 63.420705],
-                    [10.403855, 63.421078]
-                ]]
-            }
-        }, {
-            "type": "Feature",
-            "properties": {"name": "SIT Dragvoll"},
-            "geometry": {
-                "type": "Polygon",
-                "coordinates": [[
-                    [10.474145, 63.407263],
-                    [10.475657, 63.407148],
-                    [10.475491, 63.406157],
-                    [10.473766, 63.406265],
-                    [10.474145, 63.407263]
-                ]]
-            }
-        }
-    ]
-}
\ No newline at end of file
diff --git a/javascript/exampleData/Universities.geojson b/javascript/exampleData/Universities.geojson
deleted file mode 100644
index 56842e9be804758125c68e6881fe0a88a891b691..0000000000000000000000000000000000000000
--- a/javascript/exampleData/Universities.geojson
+++ /dev/null
@@ -1,33 +0,0 @@
-{
-    "type": "FeatureCollection",
-    "properties": {"name": "Universities"},
-    "features": [
-        {
-            "type": "Feature",
-            "properties": {"name": "Gløshaugen"},
-            "geometry": {
-                "type": "Polygon",
-                "coordinates": [[
-                    [10.403787, 63.420031],
-                    [10.410954, 63.414691],
-                    [10.404863, 63.414188],
-                    [10.398170, 63.418901],
-                    [10.403787, 63.420031]
-                ]]
-            }
-        }, {
-            "type": "Feature",
-            "properties": {"name": "Dragvoll"},
-            "geometry": {
-                "type": "Polygon",
-                "coordinates": [[
-                    [10.467217, 63.409471],
-                    [10.471829, 63.408921],
-                    [10.47094, 63.406668],
-                    [10.466968 , 63.407128],
-                    [10.467217, 63.409471]
-                ]]
-            }
-        }
-    ]
-}
\ No newline at end of file
diff --git a/javascript/fileHandler.js b/javascript/fileHandler.js
index 6b7c335b1041092e89c18b907e9f98c6a640dbe6..29bfda322076feb3a4e6adbf97ca660a84bf4b40 100644
--- a/javascript/fileHandler.js
+++ b/javascript/fileHandler.js
@@ -35,9 +35,13 @@ function handleFile() {
         })
     }
     
-    overlayMaps[selectedFile.name] = newLayer;
+    if (doLayerExist(selectedFile.name)) {
+        return alert("This layer is already added to the map!");
+    } else {
+        overlayMaps[selectedFile.name] = newLayer;
 
-    updateSidebar();
-    
-    handleLayer(selectedFile.name);
+        updateSidebar();
+        
+        handleLayer(selectedFile.name);
+    }
 }
diff --git a/javascript/geoJSON.js b/javascript/geoJSON.js
index f75cd9cbc997f7c6ed050fd7da2832e92ded3ed8..fd9b0ffb4a2a1968cf928a36ac35c8c94540e7bc 100644
--- a/javascript/geoJSON.js
+++ b/javascript/geoJSON.js
@@ -1,79 +1,10 @@
-// Test-data jeg tester funksjonalitet på:
-// Det fungerer ikke å lese fra fil ved å kun kjøre html-filen lokalt
-
-var U = {
-  "type": "FeatureCollection",
-  "properties": {"name": "Universities"},
-  "features": [
-      {
-          "type": "Feature",
-          "properties": {"name": "Gløshaugen"},
-          "geometry": {
-              "type": "Polygon",
-              "coordinates": [[
-                  [10.403787, 63.420031],
-                  [10.410954, 63.414691],
-                  [10.404863, 63.414188],
-                  [10.398170, 63.418901],
-                  [10.403787, 63.420031]
-              ]]
-          }
-      }, {
-          "type": "Feature",
-          "properties": {"name": "Dragvoll"},
-          "geometry": {
-              "type": "Polygon",
-              "coordinates": [[
-                  [10.467217, 63.409471],
-                  [10.471829, 63.408921],
-                  [10.47094, 63.406668],
-                  [10.466968 , 63.407128],
-                  [10.467217, 63.409471]
-              ]]
-          }
-      }
-  ]
-};
-
-var TC = {
-  "type": "FeatureCollection",
-  "properties" : {"name": "Training centers"},
-  "features": [
-      {
-          "type": "Feature",
-          "properties": {"name": "SIT Gløshaugen"},
-          "geometry": {
-              "type": "Polygon",
-              "coordinates": [[
-                  [10.403855, 63.421078],
-                  [10.404845, 63.421427],
-                  [10.40556, 63.421042],
-                  [10.404572, 63.420705],
-                  [10.403855, 63.421078]
-              ]]
-          }
-      }, {
-          "type": "Feature",
-          "properties": {"name": "SIT Dragvoll"},
-          "geometry": {
-              "type": "Polygon",
-              "coordinates": [[
-                  [10.474145, 63.407263],
-                  [10.475657, 63.407148],
-                  [10.475491, 63.406157],
-                  [10.473766, 63.406265],
-                  [10.474145, 63.407263]
-              ]]
-          }
-      }
-  ]
-};
-
-var test1 = L.geoJSON(U, {style: getStyle()});
-var test2 = L.geoJSON(TC, {style: getStyle()});
-
 // Det jeg skal ha med i ferdig versjon:
 
+/*
+Det fungerer ikke å lese fra fil ved å kun kjøre html-filen lokalt
+Har derfor brukt litt eksempeldata fra koden
+*/
+
 var Arealdekke = L.geoJSON(null, {style: getStyle()});
 var Bygg_f = L.geoJSON(null, {style: getStyle()});
 var Bygg_l = L.geoJSON(null, {style: getStyle()});
diff --git a/javascript/leafletLayerControl.js b/javascript/leafletLayerControl.js
index 7fa775db5b0e8eea82b38a07f47b167f0b959ff1..f4bab28638dffda4331ba25489c38e8cca1b51b2 100644
--- a/javascript/leafletLayerControl.js
+++ b/javascript/leafletLayerControl.js
@@ -21,8 +21,6 @@ function loadExampleData() {
         overlayMaps["Bygg_f"] = Bygg_f;
         overlayMaps["Bygg_l"] = Bygg_l;
         overlayMaps["Samferdsel"] = Samferdsel;
-        overlayMaps["test1"] = test1;
-        overlayMaps["test2"] = test2;
         
         updateSidebar();
         exampleLoaded = true;
diff --git a/javascript/turfFormatConverter.js b/javascript/turfFormatConverter.js
index 617d02d32464b72ddce571054a9cf42ebeff8e40..2bc235c7658247489b515c80fa5a5116481c6d6d 100644
--- a/javascript/turfFormatConverter.js
+++ b/javascript/turfFormatConverter.js
@@ -51,31 +51,12 @@ function isInputMultiPolygon(layer) {
 }
 
 function turnList(liste) {
-    /*var more = false;
-    try {
-        var test = liste[0][0][0];
-        if (test != null) {
-            more = true;
-        }
-    } catch {
-
-        more = false;
-    }
-
-    if (more) {
-        var newList = [];
-        console.log("JA")
-        for (var i = 0; i < layer.length; i++) {
-            newList.push(turnList(liste[i]));
-        }
-    } else {*/
     var newList = [];
 
     for (var i = liste.length - 1; i > -1; i--) {
         newList.push(liste[i]);
     }
-    //}
-
+    
     return newList;
 }