LeafletBundle/Resources/config/routing/admin.xml

<?xml version="1.0" encoding="UTF-8" ?>

<routes xmlns="http://symfony.com/schema/routing"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">

    <route id="admin_leaflet_vector_create" path="/admin/leaflet/vector/create">
        <default key="_controller">LeafletBundle:Leaflet:createVector</default>
    </route>
</routes>