The interactive interface is conventional, presented in the typewriter format, which is easy to read as well as distinguished to the eye. The well-defined and modern font is useful in ensuring there is clarity in the wording. The high contrast of black text on a white background is an effective method by which the text is displayed on the guide eBook. The clarity is further applied to the map, which uses moderate contrast in the images and the text, which contribute to the graphical interface supporting the guidebook.
   The comprehensiveness of the guide in the coverage of locales is another factor worth mentioning. The Greenwich streets guide resulted in over 377 pages of basic infrastructure data which has a comprehensive coverage of the regions.

   Comprehensiveness is achieved by the combined approach of using text in directing the user, as well as the generation of a directional map that illustrates the areas of interest to the user.