John Keefe, Stephen Reader, Steven Melendez and Louise Ma. Follow us @datanews, email us here.

The beautiful Watercolor map tiles are by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under CC BY SA. The names and breeds layers were built using Tilemill and are served by Mapbox. Thanks to Nathaniel V. Kelso for advice on all of the layers.

Dog license registration database from the NYC Department of Health and Mental Hygiene. Not all dogs living in New York are registered. By far the largest number of dogs are classified as "mixed/other," so we've left those out of the breed map. Tiny zip codes have been combined into larger ones nearby. Not suited for navigational purposes. View and download the data.

June 26, 2012