NYC maps, technical drawings for CAD

[czeca]

Hi

I'm an architecture student from madrid and this year school work is to project a building in manhattan. But I've been unable to find enough graphical information.

I'll need city maps with blocks, sidewalks, buldings heights, street levels..... I'll rather prefer them in autocad file format (dwg), but if its not possible any other format will be fine.

thanks very much for your help