Update README.md

README.md

@@ -125,6 +125,14 @@ docker-compose run generate-vectortiles
 
 ## License
 
-All code in this repository is under the [BSD license](./LICENSE.md) and the cartography decisions encoded in the schema and SQL are licensed under [CC-BY](./LICENSE.md).
+All code in this repository is under the [BSD license](./LICENSE.md) and the cartography decisions encoded in the schema and SQL are licensed under [CC-BY](./LICENSE.md). 
 
 Products or services using maps derived from OpenMapTiles schema need to visibly credit "OpenMapTiles.org" or reference "OpenMapTiles" with a link to http://openmaptiles.org/. Exceptions to attribution requirement can be granted on request.
+
+For a browsable electronic map based on OpenMapTiles and OpenStreetMap data, the
+credit should appear in the corner of the map. For example:
+
+[© OpenMapTiles](http://openmaptiles.org/) [© OpenStreetMap contributors](http://www.openstreetmap.org/copyright)
+
+For printed and static maps a similar attribution should be made in a textual
+description near the image, in the same fashion as if you cite a photograph.