diff --git a/msi.gama.core/src/msi/gama/common/geometry/Envelope3D.java b/msi.gama.core/src/msi/gama/common/geometry/Envelope3D.java
index 36a7a33e12..0da3a430fa 100644
--- a/msi.gama.core/src/msi/gama/common/geometry/Envelope3D.java
+++ b/msi.gama.core/src/msi/gama/common/geometry/Envelope3D.java
@@ -195,6 +195,15 @@ private Envelope3D set(final Envelope3D env) {
 		return this;
 	}
 
+	/**
+	 * Returns the maximal dimension of the envelope
+	 */
+
+	public double getLargestDimension() {
+		double result = Math.max(getWidth(), getHeight());
+		return Math.max(result, getDepth());
+	}
+
 	/**
 	 * Makes this <code>Envelope</code> a "null" envelope, that is, the envelope of the empty geometry.
 	 */