N.Y. Gen. Mun. Law § 237

§ 237. Maps and recommendations. Such planning commission may cause to\nbe made a map or maps of said city or village or any portion thereof, or\nof any land outside the limits of said city or village so near or so\nrelated thereto that in the opinion of said planning commission it\nshould be so mapped. Such plans may show not only such matters as by\nlaw have been or may be referred to the planning commission, but also\nany and all matters and things with relation to the plan of said city or\nvillage which to said planning commission seem necessary and proper,\nincluding recommendations and changes suggested by it; and any report at\nany time made, may include any of the above. Such planning commission\nmay obtain expert assistance in the making of any such maps or reports,\nor in the investigations necessary and proper with relation thereto.\n