Even after using NYCityMap once, we hope it becomes clear that a wealth of information is displayed in the application. The basemap (i.e., primary map data excluding dynamic layers) alone is particularly complex and replete. One of the original design goals for NYCityMap was to keep the cartographic symbology simple and self-explanatory. In the event that this goal has not be achieved and to provide a visual reference, the following sample map is provided. This visual explanation, or legend, shows the symbols presented on the basemap.
As you can see, there certainly is no dearth of data in NYCityMap!