--- a/src/pyams_gis/interfaces/layer.py	Wed Jan 27 15:36:14 2021 +0100
+++ b/src/pyams_gis/interfaces/layer.py	Wed Jan 27 15:37:20 2021 +0100
@@ -10,22 +10,18 @@
 # FOR A PARTICULAR PURPOSE.
 #
 
-__docformat__ = 'restructuredtext'
+from zope.annotation.interfaces import IAttributeAnnotatable
+from zope.interface import Attribute
+from zope.location.interfaces import IContained
+from zope.schema import Bool, Choice, Int, Text, TextLine
+from zope.schema.vocabulary import SimpleTerm, SimpleVocabulary
+
+from pyams_gis.interfaces import LAYER_CRS_VOCABULARY
+from pyams_gis.schema import GeoAreaField
+from pyams_i18n.schema import I18nTextLineField
 
 
-# import standard library
-
-# import interfaces
-from pyams_gis.interfaces import LAYER_CRS_VOCABULARY
-from zope.annotation.interfaces import IAttributeAnnotatable
-from zope.location.interfaces import IContained
-
-# import packages
-from pyams_gis.schema import GeoAreaField
-from pyams_i18n.schema import I18nTextLineField
-from zope.interface import Attribute
-from zope.schema import Bool, Choice, Int, TextLine
-from zope.schema.vocabulary import SimpleVocabulary, SimpleTerm
+__docformat__ = 'restructuredtext'
 
 from pyams_gis import _
 
@@ -64,6 +60,18 @@
         """Get layer configuration mapping"""
 
 
+class IGeoJSONLayer(IMapLayer):
+    """GeoJSON map layer interface"""
+
+    url = TextLine(title=_("Layer URL"),
+                   description=_("URL used to get access to JSON data"),
+                   required=True)
+
+    style = Text(title=_("Layer style"),
+                 description=_("Layer style, provided in Leaflet JSON format"),
+                 required=False)
+
+
 class IBaseTileMapLayer(IMapLayer):
     """Base tile map layer interface"""