diff --git a/web/client/plugins/Annotations/utils/AnnotationsUtils.js b/web/client/plugins/Annotations/utils/AnnotationsUtils.js
index 87df386570..3e2cba37ca 100644
--- a/web/client/plugins/Annotations/utils/AnnotationsUtils.js
+++ b/web/client/plugins/Annotations/utils/AnnotationsUtils.js
@@ -485,13 +485,15 @@ export const cleanPolygonCoordinates = (coordinates) => {
 };
 
 export const parseUpdatedCoordinates = (geometryType, updatedCoordinates) => {
+    const hasHeight = !!updatedCoordinates.find((coords) => coords[2] !== undefined);
+    const coordinates = hasHeight ? updatedCoordinates.map(([lng, lat, height]) => [lng, lat, height === undefined ? 0 : height]) : updatedCoordinates;
     if (geometryType === 'Point') {
-        return updatedCoordinates[0];
+        return coordinates[0];
     }
     if (geometryType === 'Polygon') {
-        return cleanPolygonCoordinates([updatedCoordinates]);
+        return cleanPolygonCoordinates([coordinates]);
     }
-    return updatedCoordinates;
+    return coordinates;
 };
 
 export const annotationsSymbolizerDefaultProperties = {
diff --git a/web/client/plugins/Annotations/utils/__tests__/AnnotationsUtils-test.js b/web/client/plugins/Annotations/utils/__tests__/AnnotationsUtils-test.js
index 60841aa833..f78c0a8eaf 100644
--- a/web/client/plugins/Annotations/utils/__tests__/AnnotationsUtils-test.js
+++ b/web/client/plugins/Annotations/utils/__tests__/AnnotationsUtils-test.js
@@ -552,7 +552,7 @@ describe('AnnotationsUtils', () => {
         expect(checkInvalidCoordinate(0)).toBe(false);
     });
     it('parseUpdatedCoordinates', () => {
-        expect(parseUpdatedCoordinates('Polygon', [[[0, 0], [1, 1], [1, 0], [0, 0]]])).toEqual([ [ [ [ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ] ] ] ]);
+        expect(parseUpdatedCoordinates('Polygon', [[0, 0], [1, 1], [1, 0], [0, 0]])).toEqual([[[ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ]]]);
         expect(parseUpdatedCoordinates('LineString', [[0, 0], [1, 1], [1, 0]])).toEqual([[0, 0], [1, 1], [1, 0]]);
         expect(parseUpdatedCoordinates('Point', [[0, 0]])).toEqual([0, 0]);
     });
diff --git a/web/client/utils/cesium/ModifyGeoJSONInteraction.js b/web/client/utils/cesium/ModifyGeoJSONInteraction.js
index 41d97710db..f30211f8ec 100644
--- a/web/client/utils/cesium/ModifyGeoJSONInteraction.js
+++ b/web/client/utils/cesium/ModifyGeoJSONInteraction.js
@@ -54,6 +54,10 @@ function featureToCartesianCoordinates(geometryType, feature) {
     }
 }
 
+function updateCoordinatesHeight(coordinates) {
+    return coordinates.map(([lng, lat, height]) => [lng, lat, height === undefined ? 0 : height]);
+}
+
 function updateFeatureCoordinates(feature, updateCallback) {
     if (feature?.geometry === null) {
         return feature;
@@ -65,7 +69,7 @@ function updateFeatureCoordinates(feature, updateCallback) {
             ...feature,
             geometry: {
                 type: 'Point',
-                coordinates: [feature.geometry.coordinates].reduce(updateCallback, [])[0]
+                coordinates: updateCoordinatesHeight([feature.geometry.coordinates].reduce(updateCallback, []))[0]
             }
         };
     case 'LineString':
@@ -73,7 +77,7 @@ function updateFeatureCoordinates(feature, updateCallback) {
             ...feature,
             geometry: {
                 type: 'LineString',
-                coordinates: feature.geometry.coordinates.reduce(updateCallback, [])
+                coordinates: updateCoordinatesHeight(feature.geometry.coordinates.reduce(updateCallback, []))
             }
         };
     case 'Polygon':
@@ -81,7 +85,7 @@ function updateFeatureCoordinates(feature, updateCallback) {
             ...feature,
             geometry: {
                 type: 'Polygon',
-                coordinates: [feature.geometry.coordinates[0].reduce(updateCallback, [])]
+                coordinates: [updateCoordinatesHeight(feature.geometry.coordinates[0].reduce(updateCallback, []))]
             }
         };
     default: