I am working on a project/map and I am trying to identify the density of recreational activities or services near population centers. I have four basic recreational services, three of which I have converted to point data but the third dataset is line data (trail systems). I am thinking that if I combine the four datasets into one "recreational" dataset it would be the best way to accurately represent recreational services throughout my study area. What would be the best method to integrate the line data with my point data to depict recreational activity or service data for population centers? Is there a method to convert line data to point data? Can I mix the two together?