Does anyone know of a good source for North American public boat and kayak launch sites for mapping in a GIS. I would prefer a web service.
I am not aware of a National Dataset with this information in it. There are several regional web pages that have this information for the state/county level. Is there a specific state you are interested in?
See this topic as it seems to be exactly what you are looking for: http://freegeographytools.com/2009/marine-navigation-gis-data
Great Lakes Boat Launches - http://www.great-lakes.net/gis/metadata/acp/
Boat Launch Ramps in Many States - http://www.launchingramps.com/
PA - http://fishandboat.com/access.htm - fill out the form to send to Commission office for this information
And finally a third party proprietary application that holds this data: