Need Map of Public Access Land for US State

I'm taking my daughter rockhounding either today or tomorrow and have a list of coordinates around Rhode Island that are supposedly good for various rock types. Some of these coordinates, the ones we've been to, are very clearly on land that can be easily/allowably accessed. However, there are also locations where I have no clue if I'm technically allowed to enter. I've rather fervently tried to find a map of RI that details what parcels can be accessed by the public and what can't, but I've only really found this sort of info for RI's beaches. The best I've found is here: https://ridemgis.maps.arcgis.com/apps/webappviewer/index.html?id=9afb39aab8c4430c86c6c6d2aef8e5d0 but it's got a lot of grey area and still seems ambiguous to me regarding what's "off limits" and what isn't. It would be so awesome if there was a map/utility where I could input a set of coordinates and get info on whether that spot is public access or not.