(photo CC Jen Hudon)
Several groups are using PLOTS tools in the NYC area, including students at Parsons, Pratt and Columbia. Some are using balloon mapping to document at-risk ecological sites.
More updates soon, but for now take a look at Grassroots Newark:
As well as a recent workshop held at Union Square: http://grassrootsmapping.org/search/parsons
Gowanus Canal Mapping
New York City is home to the "Gowanus division" of Grassroots Mapping, which is conducting a monitoring project of the Gowanus Canal cleanup.