Usage edit
This template is to show an interactive map of Paris' arrondissements. It only has 1 parameter which is aptly named "arrondissement". This parameter can be used to load the version of the Paris map which corresponds to that particular arrondissement.
Example: Say you are working on an article dealing with the 1er arrondissement and would like to have a map demonstrating this. All you have to do is enter this: {{arrondissement|arrondissement={{{arrondissement|1er}}}}}
And voilà! Note parameter arrondissement has value "1er", this tells the system to load the corresponding map, with the 1er in a darker colour.