bounds.js | Asynchronous boundary detection - lazy-loading , infinite

You are projecting data with a projection that is intended to project points across the entire US, including Hawaii and Alaska. New York will be a small portion of this projection area. Scaling any map projection will zoom in towards the center of your projection - d3 does not know to zoom in to a particular location, so as you zoom in, New York will fall off the edge of your projection.

As an AlbersUsa projection is a composite projection (to allow inclusion of Alaska, Hawaii), it is actually several Albers projections combined on one plane. Because of its composite nature, it is harder to manipulate. To keep things simple, I would recommend using a plain Albers projection. This also allows you to tailor the projection to New York state.

An Albers projection has two standard parallels, these are parallels of the projected plane that intersect the surface of the globe (it is a conical projection). The standard parallels should be located in the area of interest, one in the lower half and one in the uppper (as these are the parallels that intersect the globe, distortion is minimized along these parallels). For New York state, parallels like 41 and 44 degrees north could work.

You also need to center the projection. To do so you need the geographic center of your area of interest. The center of New York is 42.954 degrees north and 75.527 degrees west (-75.527 degrees East). To center a Albers projection, rotate on the x(by the inverse of the longitude as we spin the globe under us) and center on the y. Altogether this looks like: