The first three images are from Cooper Union. The first is an analysis of Central Park, the second is called the Fascination of Manhattan, the third is entitled Datum Project: Times Square.
The last two images are from ETH in Zurich. The project is entitled Urban Strata and focuses on the diagramming of the layers of a site within an urban context.
These examples illustrate different uses of notation within variant situations. Take note of the excellent use of graphic annotation and heirarchy apparent in each of these diagrams.