Here's another source of ideas for the block study. This book centers on more of the architectural aspects. Robert Kaufman's work has been featured in the City section of the Times and recently in the Villager. Here's the villager article
The picture above is a screen shot of my lower east side map from my google map "collection." It can be made fully functional but it overwhelms the column. I learned about mapchannels from digital urban. The free site also gives you the option to create a link to a full size version of a google map.