diff --git a/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java b/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java
index 10c2d27..91036f8 100644
--- a/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java
+++ b/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java
@@ -47,6 +47,7 @@ public class PropertyChecker
     public static final String WEEKS = "^\\d*(,\\d*){0,52}$";
     public static final String DAYS = "^\\d*(,\\d*){0,365}$";
     public static final String COUNTRY_CODE = "^[a-zA-Z]{2}$";
+    public static final String DECIMAL_DEGREE = "^[+-]?\\d+[,\\.]\\d{1,8}$";
 
     public static final String SUBS = "^subs\\.\\S+$";
     public static final String METRICS_NAME = "^metrics\\.\\S+\\.name$";
@@ -131,8 +132,8 @@ public class PropertyChecker
         this.organizationRules.add("organization.country.name", STRING, PropertyMode.WISHED);
         this.organizationRules.add("organization.country.code", COUNTRY_CODE, PropertyMode.MANDATORY);
         this.organizationRules.add("organization.funding.*", "^organization\\.funding\\.\\S+$", STRING, PropertyMode.OPTIONAL);
-        this.organizationRules.add("organization.geolocation.latitude", STRING, PropertyMode.OPTIONAL);
-        this.organizationRules.add("organization.geolocation.longitude", STRING, PropertyMode.OPTIONAL);
+        this.organizationRules.add("organization.geolocation.latitude", DECIMAL_DEGREE, PropertyMode.OPTIONAL);
+        this.organizationRules.add("organization.geolocation.longitude", DECIMAL_DEGREE, PropertyMode.OPTIONAL);
         this.organizationRules.add("organization.geolocation.address", STRING, PropertyMode.OPTIONAL);
 
         this.organizationRules.add(SUBS, URL, PropertyMode.OPTIONAL);