ANF boundary question

maxmapper · Post by **maxmapper** » Mon Apr 06, 2020 1:24 pm

I noticed that in the recent map distributed with the trail closures it has a National Forest Boundary marked in green:

But on the 'FSTopo' map here https://data.fs.usda.gov/geodata/raster ... states.php, if you go to the region around the Cobb Estate for example it shows the same green line above but in Black, and the shaded green area above as a second boundary:

I'm trying to wrap my head around how there could be two boundaries. I was looking on CalTopo https://caltopo.com/map.html#ll=34.2022 ... =15&b=1900 on their 1895-1915 historical layer and it appears that maybe the black line is the historical boundary? But why would they be using an outdated historical boundary in a trail closure document published in 2020? Does anyone else have an idea what the difference is between the green and black lines are and if the black line is even relevant as a boundary?

Post by **dima** » Mon Apr 06, 2020 5:34 pm

The county assessor says that the questionable strip (in T1N, but N of the residences) is "Government Owned", but not "Forest": https://portal.assessor.lacounty.gov/pa ... 5843009903

It might technically be ANF, but I don't know if it matters. Caltopo has a property layer too, by the way: check the "public lands" box.

willie92708 · Post by **willie92708** » Wed Apr 08, 2020 8:48 am

If you really want to know who owns the land, you need to look at the parcels like this: https://landgrid.com/us/ca/los-angeles/ ... ey/2064046 Once you have the parcel number, you can lookup the the owner at the county tax assessor's webpage.

maxmapper · Post by **maxmapper** » Wed Apr 08, 2020 10:00 am

Thanks @willie92708. I also got some more information by emailing the ANF, they told me the black line is the 'congressional boundary' and the green line is the 'administrative boundary'. Not sure if there are any legal differences there though...