diff --git a/src/Converter/Feature2Mesh.js b/src/Converter/Feature2Mesh.js
index f459bb29e5..3a9d07408e 100644
--- a/src/Converter/Feature2Mesh.js
+++ b/src/Converter/Feature2Mesh.js
@@ -10,6 +10,19 @@ import Coordinates from 'Core/Geographic/Coordinates';
 
 const coord = new Coordinates('EPSG:4326', 0, 0, 0);
 
+/**
+ * @class
+ * @classdesc FeatureContext is a class to store all informations
+ * about context to generate the style of each FeatureGeometry.
+ *
+ * @property {Coordinates}      worldCoord @private Coordinates of the FeatureGeometry in world system.
+ * @property {Coordinates}      localCoordinates @private Are the coordinates systeme origin local or global.
+ * @property {boolean}          isProjected @private Are the coordinates already been projected.
+ * @property {FeatureGeometry}  geometry  @private
+ * @property {Object}           globals
+ * @property {Object}           collection
+ * @property {Coordinates}      coordinates
+ */
 class FeatureContext {
     #worldCoord = new Coordinates('EPSG:4326', 0, 0, 0);
     #localCoordinates = new Coordinates('EPSG:4326', 0, 0, 0);
@@ -17,6 +30,9 @@ class FeatureContext {
     #geometry = {};
 
     constructor() {
+    /**
+     * @constructor
+     */
         this.globals = {};
     }
 
@@ -247,11 +263,10 @@ function featureToPoint(feature, options) {
 
             coord.copy(context.setLocalCoordinatesFromArray(feature.vertices, v));
             const style = feature.style.applyContext(context);
-            const { base_altitude, color } = style.point;
-            coord.z = 0;
+            const { color } = style.point;
 
             // populate vertices
-            base.copy(normal).multiplyScalar(base_altitude).add(coord).toArray(vertices, v);
+            base.copy(normal).multiplyScalar(context.collection.center.z).add(coord).toArray(vertices, v);
             toColor(color).multiplyScalar(255).toArray(colors, v);
             batchIds[j] = id;
         }
@@ -319,12 +334,14 @@ function featureToLine(feature, options) {
             }
 
             coord.copy(context.setLocalCoordinatesFromArray(feature.vertices, v));
+
             const style = feature.style.applyContext(context);
-            const { base_altitude, color } = style.stroke;
-            coord.z = 0;
+            const { color } = style.stroke;
 
             // populate geometry buffers
-            base.copy(normal).multiplyScalar(base_altitude).add(coord).toArray(vertices, v);
+            base.copy(normal).multiplyScalar(context.collection.center.z).add(coord);
+            base.toArray(vertices, v);
+
             toColor(color).multiplyScalar(255).toArray(colors, v);
             batchIds[j] = id;
         }
@@ -373,11 +390,10 @@ function featureToPolygon(feature, options) {
 
             coord.copy(context.setLocalCoordinatesFromArray(feature.vertices, i));
             const style = feature.style.applyContext(context);
-            const { base_altitude, color } = style.fill;
-            coord.z = 0;
+            const { color } = style.fill;
 
             // populate geometry buffers
-            base.copy(normal).multiplyScalar(base_altitude).add(coord).toArray(vertices, i);
+            base.copy(normal).multiplyScalar(context.collection.center.z).add(coord).toArray(vertices, i);
             batchIds[b] = id;
             toColor(color).multiplyScalar(255).toArray(colors, i);
         }
@@ -463,7 +479,7 @@ function featureToExtrudedPolygon(feature, options) {
             coord.z = 0;
 
             // populate base geometry buffers
-            base.copy(normal).multiplyScalar(base_altitude).add(coord).toArray(vertices, i);
+            base.copy(normal).multiplyScalar(base_altitude - context.collection.center.z).add(coord).toArray(vertices, i);
             batchIds[b] = id;
 
             // populate top geometry buffers
diff --git a/src/Core/Geographic/Coordinates.js b/src/Core/Geographic/Coordinates.js
index aea1e0cd58..08606c7a29 100644
--- a/src/Core/Geographic/Coordinates.js
+++ b/src/Core/Geographic/Coordinates.js
@@ -63,7 +63,7 @@ class Coordinates {
      * @example
      * itowns.proj4.defs('EPSG:3946', '+proj=lcc +lat_1=45.25 +lat_2=46.75 +lat_0=46 +lon_0=3 +x_0=1700000 +y_0=5200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs');
      * You can find most projections and their proj4 code at [epsg.io]{@link https://epsg.io/}
-     * @param {number|Array<number>|Coordinates|THREE.Vector3} [v0=0] -
+     * @param {number|number[]|Coordinates|THREE.Vector3} [v0=0] -
      * x or longitude value, or a more complex one: it can be an array of three
      * numbers, being x/lon, x/lat, z/alt, or it can be `THREE.Vector3`. It can
      * also simply be a Coordinates.
@@ -98,7 +98,7 @@ class Coordinates {
 
     /**
      * Sets the Coordinate Reference System.
-     * @param {String} crs Coordinate Reference System (e.g. 'EPSG:4978')
+     * @param {string} crs Coordinate Reference System (e.g. 'EPSG:4978')
      */
     setCrs(crs) {
         CRS.isValid(crs);
@@ -107,7 +107,6 @@ class Coordinates {
 
     /**
      * Set the values of this Coordinates.
-     *
      * @param {number} [v0=0] - x or longitude value.
      * @param {number} [v1=0] - y or latitude value.
      * @param {number} [v2=0] - z or altitude value.
@@ -125,8 +124,7 @@ class Coordinates {
 
     /**
      * Set the values of this Coordinates from an array.
-     *
-     * @param {Array<number>} array - An array of number to assign to the
+     * @param {number[]} array - An array of number to assign to the
      * Coordinates.
      * @param {number} [offset] - Optional offset into the array.
      *
@@ -139,7 +137,6 @@ class Coordinates {
     /**
      * Set the values of this Coordinates from a `THREE.Vector3` or an `Object`
      * having `x/y/z` properties, like a `Coordinates`.
-     *
      * @param {THREE.Vector3|Coordinates} v0 - The object to read the values
      * from.
      *
@@ -162,7 +159,6 @@ class Coordinates {
     /**
      * Copies the values of the passed Coordinates to this one. The CRS is
      * however not copied.
-     *
      * @param {Coordinates} src - The source to copy from.
      *
      * @return {Coordinates} This Coordinates.
@@ -206,7 +202,6 @@ class Coordinates {
 
     /**
      * Return this Coordinates values into a `THREE.Vector3`.
-     *
      * @param {THREE.Vector3} [target] - The target to put the values in. If not
      * specified, a new vector will be created.
      *
@@ -218,13 +213,11 @@ class Coordinates {
 
     /**
      * Copy values coordinates to array
-     *
      * @param  {number[]} array - array to store this vector to. If this is not
      * provided a new array will be created.
      * @param  {number} [offset=0] - optional offset into the array.
      *
-     * @return {number[]} Returns an array [x, y, z], or copies x, y and z into
-     * the provided array.
+     * @return {number[]} Returns an array [x, y, z], or copies x, y and z into the provided array.
      */
     toArray(array = [], offset = 0) {
         return THREE.Vector3.prototype.toArray.call(this, array, offset);
@@ -233,10 +226,9 @@ class Coordinates {
     /**
      * Calculate planar distance between this coordinates and `coord`.
      * Planar distance is the straight-line euclidean distance calculated in a 2D cartesian coordinate system.
-     *
      * @param  {Coordinates}  coord  The coordinate
-     * @return {number} planar distance
      *
+     * @return {number} planar distance
      */
     planarDistanceTo(coord) {
         this.toVector3(v0).setZ(0);
@@ -248,12 +240,10 @@ class Coordinates {
      * Calculate geodetic distance between this coordinates and `coord`.
      * **Geodetic distance** is calculated in an ellispoid space as the shortest distance
      * across the curved surface of the world.
-     *
      * => As the crow flies/ Orthodromy
-     *
      * @param  {Coordinates}  coord  The coordinate
-     * @return {number} geodetic distance
      *
+     * @return {number} geodetic distance
      */
     geodeticDistanceTo(coord) {
         this.as('EPSG:4326', coord0);
@@ -263,10 +253,9 @@ class Coordinates {
 
     /**
      * Calculate earth euclidean distance between this coordinates and `coord`.
-     *
      * @param  {Coordinates}  coord  The coordinate
-     * @return {number} earth euclidean distance
      *
+     * @return {number} earth euclidean distance
      */
     spatialEuclideanDistanceTo(coord) {
         this.as('EPSG:4978', coord0).toVector3(v0);
@@ -276,8 +265,8 @@ class Coordinates {
 
     /**
      * Multiplies this `coordinates` (with an implicit 1 in the 4th dimension) and `mat`.
-     *
      * @param      {THREE.Matrix4}  mat The matrix.
+     *
      * @return     {Coordinates}  return this object.
      */
     applyMatrix4(mat) {