diff --git a/configuration/configuration_vmap.md b/configuration/configuration_vmap.md
index 7ab10ab838f5ef843a75e4778439fd7c9cb9b970..e9bc41d9e6834b249ce67d123421ba8a0ba86f27 100644
--- a/configuration/configuration_vmap.md
+++ b/configuration/configuration_vmap.md
@@ -284,6 +284,13 @@ Défaut:
 $properties['vmap_export']['gtf_export_coordsys'] = '[{"label":"2154 Lambert 93","value":"2154"},{"label":"3857 WGS84 Spherical Mercator","value":"3857"},{"label":"4326 WGS84 Longitude latitude","value":"4326"},{"label":"27561 Lambert I Nord","value":"27561"},{"label":"27562 Lambert II Centre","value":"27562"},{"label":"27563 Lambert III Sud","value":"27563"},{"label":"27564 Lambert IV Corse","value":"27564"},{"label":"27571 Lambert I Carto","value":"27571"},{"label":"27572 Lambert II Carto","value":"27572"},{"label":"27573 Lambert III Carto","value":"27573"},{"label":"27572 Lambert IV Carto","value":"27572"}]'
 ```
 
+#### $properties['vmap_export']['gtf_2020']
+
+Permet l'extraction des données par GTF en version 2020.
+
+Si GTF est en version 2020 ou suppérieure il faudra écrire `$properties['vmap_export']['gtf_2020'] = true;`
+
+
 ## Configuration client avec properties.json
 
 En modifiant le fichier *vmap/client/conf/properties.json* il est possible de configurer la partie client de l'application