diff --git a/src/buildingpart.js b/src/buildingpart.js
index 84160dc..3f642ce 100644
--- a/src/buildingpart.js
+++ b/src/buildingpart.js
@@ -270,7 +270,7 @@ class BuildingPart {
       const options = {
         center: center,
         angle: angle / 180 * Math.PI,
-        depth: this.options.roof.height,
+        depth: this.options.roof.height ?? 3,
       };
       const geometry = new WedgeGeometry(this.shape, options);
 
@@ -434,7 +434,7 @@ class BuildingPart {
 
   /**
    * OSM compass degrees are 0-360 clockwise.
-   *
+   * 0 degrees is North.
    * @return {number} degrees
    */
   static atanRadToCompassDeg(rad) {
diff --git a/src/extras/BuildingShapeUtils.js b/src/extras/BuildingShapeUtils.js
index 6dedcf8..091f533 100644
--- a/src/extras/BuildingShapeUtils.js
+++ b/src/extras/BuildingShapeUtils.js
@@ -287,7 +287,6 @@ class BuildingShapeUtils extends ShapeUtils {
    */
   static combineCoordinates(shape) {
     const points = shape.extractPoints().shape;
-    points.pop();
     var x = [];
     var y = [];
     var vec;
@@ -337,7 +336,6 @@ class BuildingShapeUtils extends ShapeUtils {
    */
   static edgeLength(shape) {
     const points = shape.extractPoints().shape;
-    points.pop();
     const lengths = [];
     var p1;
     var p2;
@@ -359,7 +357,6 @@ class BuildingShapeUtils extends ShapeUtils {
    */
   static vertexAngle(shape) {
     const points = shape.extractPoints().shape;
-    points.pop();
     const angles = [];
     var p0;
     var p1;
@@ -394,7 +391,6 @@ class BuildingShapeUtils extends ShapeUtils {
    */
   static edgeDirection(shape) {
     const points = shape.extractPoints().shape;
-    points.pop();
     const angles = [];
     var p1;
     var p2;
@@ -418,7 +414,6 @@ class BuildingShapeUtils extends ShapeUtils {
   static surrounds(shape, point) {
     var count = 0;
     const vecs = shape.extractPoints().shape;
-    vecs.pop();
     var vec;
     var nextvec;
     for (let i = 0; i < vecs.length; i++) {
@@ -468,7 +463,7 @@ class BuildingShapeUtils extends ShapeUtils {
    * Return the angle of the longest side of a shape with 90° vertices.
    *
    * @param {THREE.Shape} shape - the shape
-   * @return {number}
+   * @return {number} in radians from Pi > x > -Pi
    */
   static longestSideAngle(shape) {
     const lengths = BuildingShapeUtils.edgeLength(shape);
diff --git a/test/building.test.js b/test/building.test.js
index 1bc9167..96f75a2 100644
--- a/test/building.test.js
+++ b/test/building.test.js
@@ -309,6 +309,10 @@ test('Test downloading type=building with multipolygon outline and multiple inne
   const building = new Building('42', innerData);
   expect(building.id).toBe('42');
   expect(building.outerElement.shape.holes.length).toBe(1);
+  const urlBase = 'https://api.openstreetmap.org/api/0.6/';
+  expect(global.fetch.mock.calls[0][0]).toBe(urlBase + 'relation/42/full');
+  expect(global.fetch.mock.calls[1][0]).toBe(urlBase + 'relation/40/full');
+  expect(global.fetch.mock.calls[2][0]).toBe(urlBase + 'map?bbox=30.4980057,59.9380365,30.4993839,59.9385087');
 });
 
 window.printError = printError;
diff --git a/test/buildingpart.test.js b/test/buildingpart.test.js
index f368452..16f6c55 100644
--- a/test/buildingpart.test.js
+++ b/test/buildingpart.test.js
@@ -61,6 +61,8 @@ test('Constructor', () => {
   expect(part.options.roof.orientation).toBe('along');
 
   // toDo: Mock BuildingShapeUtils and test options
+  expect(BuildingShapeUtils.edgeDirection(part.shape)).toStrictEqual([1.5707963267948966, 0, -1.5707963267948966, 3.141592653589793]);
+  expect(BuildingShapeUtils.longestSideAngle(part.shape)).toBe(1.5707963267948966);
   expect(part.options.roof.direction).toBe(90);
   expect(errors.length).toBe(0);
 });
diff --git a/test/utils.test.js b/test/utils.test.js
index b673c85..b71d8c5 100644
--- a/test/utils.test.js
+++ b/test/utils.test.js
@@ -115,20 +115,17 @@ const rightTriangle = new Shape();
 rightTriangle.moveTo(1, 1);
 rightTriangle.lineTo(1, -1);
 rightTriangle.lineTo(-1, 1);
-rightTriangle.lineTo(1, 1);
 
 const rightTriangle2 = new Shape();
 rightTriangle2.moveTo(1, 1);
 rightTriangle2.lineTo(-1, 1);
 rightTriangle2.lineTo(1, -1);
-rightTriangle2.lineTo(1, 1);
 
 const rectangle = new Shape();
 rectangle.moveTo(-4.332738077015795, -5.882209888874915);
 rectangle.lineTo(-4.332738077015795, 5.88221335051411);
 rectangle.lineTo(4.332747472106493, 5.88221335051411);
 rectangle.lineTo(4.332747472106493, -5.882209888874915);
-rectangle.lineTo(-4.332738077015795, -5.882209888874915);
 
 test('Extents no Rotation', () => {
   expect(BuildingShapeUtils.extents(rightTriangle)).toStrictEqual([-1, -1, 1, 1]);