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New York City

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(photo CC Jen Hudon)

Several groups in the NYC area are using PLOTS tools including balloon mapping to document at-risk ecological sites.

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.

gowanus_CanoeRun by Carlos Yusitis

The Gowametta

Check out Grassroots Newark:
http://grassrootsnewark.wordpress.com/

as well as a recent workshop held at Union Square: http://grassrootsmapping.org/search/parsons