diff --git a/lib/src/Base/Common/ResourceMap.cxx b/lib/src/Base/Common/ResourceMap.cxx
index f83adfe08b..15b5604ecc 100644
--- a/lib/src/Base/Common/ResourceMap.cxx
+++ b/lib/src/Base/Common/ResourceMap.cxx
@@ -27,6 +27,7 @@
 #include "openturns/Path.hxx"
 #include "openturns/Collection.hxx"
 #include "openturns/XMLToolbox.hxx"
+
 #ifdef OPENTURNS_HAVE_LIBXML2
 #include <libxml/tree.h>
 #endif
@@ -195,6 +196,11 @@ void ResourceMap::AddAsString(const String & key, const String & value)
   GetInstance().lock().addAsString(key, value);
 }
 
+void ResourceMap::AddAsStringEnum(const String & key, const String & value, const std::vector<String> & enumValues)
+{
+  GetInstance().lock().addAsStringEnum(key, value, enumValues);
+}
+
 void ResourceMap::AddAsBool(const String & key, const Bool value)
 {
   GetInstance().lock().addAsBool(key, value);
@@ -326,7 +332,11 @@ void ResourceMap::removeKey(const String & key)
 
   const String keyType(getType(key));
   if (keyType == "str")
+  {
     mapString_.erase(mapString_.find(key));
+    if (mapStringEnum_.find(key) != mapStringEnum_.end())
+      mapStringEnum_.erase(mapStringEnum_.find(key));
+  }
   else if (keyType == "float")
     mapScalar_.erase(mapScalar_.find(key));
   else if (keyType == "int")
@@ -453,6 +463,14 @@ void ResourceMap::setAsString(const String & key, const String & value)
   const MapStringType::iterator it = mapString_.find(key);
   if (it == mapString_.end())
     throw InternalException(HERE) << "Key '" << key << "' is missing in ResourceMap as a String.";
+  const MapStringEnumType::iterator it2 = mapStringEnum_.find(key);
+  if (it2 != mapStringEnum_.end() && std::find(it2->second.begin(), it2->second.end(), value) == it2->second.end())
+  {
+    String possibleValues;
+    for (std::vector<String>::iterator it3 = it2->second.begin(); it3 != it2->second.end(); ++ it3)
+      possibleValues += *it3 + ", ";
+    throw InvalidArgumentException(HERE) << "Value for key '" << key << "' must be one of: " << possibleValues << " got '" << value << "'";
+  }
   it->second = value;
 }
 
@@ -487,6 +505,16 @@ void ResourceMap::addAsString(const String & key, const String & value)
   mapString_[key] = value;
 }
 
+void ResourceMap::addAsStringEnum(const String & key, const String & value, const std::vector<String> & enumValues)
+{
+  if (mapString_.find(key) != mapString_.end())
+    throw InternalException(HERE) << "Key '" << key << "' is already in ResourceMap as a String.";
+  mapString_[key] = value;
+  if (std::find(enumValues.begin(), enumValues.end(), value) == enumValues.end())
+    throw InternalException(HERE) << "Enum values do not contain value '" <<  value << "'";
+  mapStringEnum_[key] = enumValues;
+}
+
 void ResourceMap::addAsBool(const String & key, const Bool value)
 {
   if (mapBool_.find(key) != mapBool_.end())
@@ -718,7 +746,7 @@ void ResourceMap::loadDefaultConfiguration()
   addAsUnsignedInteger("Contour-DefaultLevelsNumber", 10);
   addAsBool("Contour-DefaultIsFilled", false);
   addAsBool("Contour-DefaultDrawLabels", true);
-  addAsString("Contour-DefaultColorMapNorm", "linear");
+  addAsStringEnum("Contour-DefaultColorMapNorm", "linear", {"asinh", "linear", "log", "logit", "symlog", "rank"});
   addAsString("Contour-DefaultColorMap", "viridis");
   addAsString("Contour-DefaultColorBarPosition", "right");
   addAsString("Contour-DefaultExtend", "both");
diff --git a/lib/src/Base/Common/openturns/ResourceMap.hxx b/lib/src/Base/Common/openturns/ResourceMap.hxx
index 0549e4ccc3..e393bd82e3 100644
--- a/lib/src/Base/Common/openturns/ResourceMap.hxx
+++ b/lib/src/Base/Common/openturns/ResourceMap.hxx
@@ -65,6 +65,7 @@ public:
 
   /** Add a value in the maps */
   static void AddAsString(const String & key, const String & value);
+  static void AddAsStringEnum(const String & key, const String & value, const std::vector<String> & enumValues);
   static void AddAsBool(const String & key, const Bool value);
   static void AddAsUnsignedInteger(const String & key, const UnsignedInteger value);
   static void AddAsScalar(const String & key, const Scalar value);
@@ -220,6 +221,7 @@ protected:
    * @param value The value written to a string
    */
   void addAsString(const String & key, const String & value);
+  void addAsStringEnum(const String & key, const String & value, const std::vector<String> & enumValues);
 
   /** Method for adding information into the resource map
    * @param key The name under which the value is stored in the ResourceMap
@@ -280,11 +282,13 @@ private:
   typedef std::map< String, Scalar > MapScalarType;
   typedef std::map< String, UnsignedInteger > MapUnsignedIntegerType;
   typedef std::map< String, Bool > MapBoolType;
+  typedef std::map< String, std::vector< String > > MapStringEnumType;
 
   MapStringType mapString_;
   MapScalarType mapScalar_;
   MapUnsignedIntegerType mapUnsignedInteger_;
   MapBoolType mapBool_;
+  MapStringEnumType mapStringEnum_;
 
   friend struct ResourceMap_init;
 }; /* class ResourceMap */
diff --git a/python/src/ResourceMap_doc.i.in b/python/src/ResourceMap_doc.i.in
index a97b3785f4..b63a57d2de 100644
--- a/python/src/ResourceMap_doc.i.in
+++ b/python/src/ResourceMap_doc.i.in
@@ -234,6 +234,30 @@ Examples
 
 // ---------------------------------------------------------------------
 
+%feature("docstring") OT::ResourceMap::AddAsStringEnum
+"Add a new string enum parameter.
+
+Similar to :meth:`AddAsString` except :meth:`SetAsString` calls will make sure the
+value associated to that key is part of the list of possible supplied values.
+
+Parameters
+----------
+key : str
+    An identifier associated to the parameter.
+value : str
+    The value associated to that key. The key is added to the string map even if
+    it already exists in another map (float, int or bool).
+enumValues : sequence of str
+    Possible values
+
+Examples
+--------
+>>> import openturns as ot
+>>> ot.ResourceMap.AddAsStringEnum('View-ImageFormat3', 'png', ['png', 'jpg', 'bmp'])
+>>> ot.ResourceMap.RemoveKey('View-ImageFormat3')"
+
+// ---------------------------------------------------------------------
+
 %feature("docstring") OT::ResourceMap::GetAsString
 "Access a string parameter.
 
diff --git a/python/test/t_ResourceMap_missing.py b/python/test/t_ResourceMap_missing.py
index cd8ba3b006..72b956bbe7 100755
--- a/python/test/t_ResourceMap_missing.py
+++ b/python/test/t_ResourceMap_missing.py
@@ -13,9 +13,10 @@
     resourcemap_lines += f.read().splitlines()
 resourcemap_content = {}
 for line in resourcemap_lines:
-    match = re.search(r'addAs(\w+)\("([\w\-]+)",[ ]*([\w\d\.\-\"]+)\);', line)
+    match = re.search(r'addAs(\w+)\("([\w\-]+)",[ ]*([\w\d\.\-\"]+)[\),]', line)
     if match is not None:
         key, vtype, value = match.group(2), match.group(1), match.group(3)
+        print(key, vtype, value)
         if key == "SymbolicParser-Backend":
             continue
         if vtype == "Scalar":
@@ -24,7 +25,7 @@
             resourcemap_content[key] = int(value)
         elif vtype == "Bool":
             resourcemap_content[key] = {"true": True, "false": False}[value]
-        elif vtype == "String":
+        elif vtype.startswith("String"):
             resourcemap_content[key] = value.strip('"')
         else:
             raise ValueError(f"got {key}")