Planning a trip to New York?  The Museum of the City of New York has three exhibitions of special interest to Nederlanders.  This one is for map-people, too.  Written-about in an Arts section review in the New York Times, the exhibition sounds a delight, and there is a book by the exhibition designer, Eric W. Sanderson and a clever Google maps mashup website about the Mannahatta Project sponsored by the Wildlife Conservation Fund.   Time to travel.

Update 5/7/2018: In 2010, and until 2013, the Mannahatta Project became the Welikia Project. In 2017 an entry in Jason King’s blog Hidden Hydrology explains recent project developments.