license, license_url and permissions_url fields

CONTRIBUTING.md

@@ -13,6 +13,10 @@ To improve readability, the keys of the GeoJSON document should be ordered consi
 
 We further recommend to add the licence related properties.
 
+- `license` A [SPDX short identifier](https://spdx.org/licenses/) for the imagery license. Use `COMMERCIAL` for sources not under an open license. Use `USGOV-PD` for US Government works in the public domain.
+- `license_url` A URL for the publishers licensing or terms of use information of the imagery.
+- `permission_url` A URL for the waiver document or explicit permission given to OSM to derive features.
+
 See [schema.json](schema.json) for the full list of available properties.
 
 ##### Source URL

schema.json

@@ -94,8 +94,16 @@
                         "no"
                     ]
                 },
+                "license": {
+                    "description": "A SPDX short identifier for the imagery license. Use COMMERCIAL for sources not under an open license. Use USGOV-PD for US Government works in the public domain.",
+                    "type": "string"
+                },
                 "license_url": {
-                    "description": "A URL for the license or permissions for the imagery",
+                    "description": "A URL for the publishers licensing or terms of use information of the imagery",
+                    "type": "string"
+                },
+                "permission_url": {
+                    "description": "A URL for the waiver document or explicit permission given to OSM to derive features",
                     "type": "string"
                 },
                 "privacy_policy_url": {
@@ -274,4 +282,4 @@
             }
         }
     }
-}
+}