Does anyone know, is there a map of the Batona with mile markers? Or some kind of digital version marked with GPS coordinates? I feel like something like this must exist.
Not as many or as large as the state's map on spstrailtracker.nj.gov or the NJGIN data, which have more serious errors.
A better way to access the openstreetmap data is at hiking.waymarkedtrails.org which presents the openstreetmap data as trail relations. It also allows you to directly and easly download a GPX file of the trail track.
I should qualify that. The NGIN errors are in isolated areas, and most are relatively small. Sometimes the trail was moved off a road, and nobody told them; the NJGIN data still has the trail following the road. In some places they seem to have just messed up - they are way off where the trail crosses NJ-72; looks like their GPS just stopped tracking for a while and nobody noticed. (Somebody told me they used an "industrial-grade" GPS with some kind of augmentation system, at the time much better than the consumer-grade units we all had.)I have no idea how accurate the njgin data is, but will take your word for it. I have removed the .gpx file I posted earlier, so as not to spead data with "serious errors".
I should qualify that. The NGIN errors are in isolated areas, and most are relatively small. Sometimes the trail was moved off a road, and nobody told them; the NJGIN data still has the trail following the road. In some places they seem to have just messed up - they are way off where the trail crosses NJ-72; looks like their GPS just stopped tracking for a while and nobody noticed. (Somebody told me they used an "industrial-grade" GPS with some kind of augmentation system, at the time much better than the consumer-grade units we all had.)
I never even noticed elevation data. To me, the trail is pretty much flat, except for Apple Pie Hill and 'Mount Korbar'.
Unfortunately, I looked at the latest GPX file for Batona from waymarkedtrails.org and while it looks OK on a map it is messed up regarding the ordering of segments and points within segments. Trying to follow it probably would not work. It used to be OK, but I think somebody's recent edits on openstreetmap.org introduced some errors that mess up their algorithm for fitting the pieces together. That's the problem with 'crowd-sourced' maps. Not that 'curated' maps don't have their own issues
I should qualify that.
I suspect the GPS is the device I saw at Batsto about 10 years ago. It has a screen on it and a plane was flying over and I could see the plane movement on the screen.
I have been logging the GPS coordinates of the markers as I (very slowly) hike the trail.
What's a good place to share this info?
I remember when you posted about that and I thought it was very cool. Now, I think that what you saw was a GPS that had an ADSB receiver. Although I believe the actual purpose of these is to prevent mid-air collisions on planes, they seem to have become a commodity now. Do a search for "ADSB receiver" at Amazon and you'll see quite a few.