@Override
    public String toUrlValue() {
      return format;
    }
<code>scale</code> affects the number of pixels that are returned. Setting <code>scale</code>
to 2 returns twice as many pixels as <code>scale</code> set to 1 while retaining the same
coverage area and level of detail (i.e. the contents of the map doesn't change).

@param scale The scale of the static map.
@return Returns this {@code StaticMapsRequest} for call chaining.
src/main/java/com/google/maps/StaticMapsRequest.java