Glad you're enjoying the map.
Actually this is a continuation of a project that I began in 2008 (see:
https://forums.njpinebarrens.com/threads/boyds-map-of-the-pines-beta-available.5103/ ) so it has been many years and thousands of hours to get to this point. And of course, there is still a lot more to do. I don't have a staff or public funding, so I just slowly plod along in my spare time.
NJGIN has parcel data dated 2016 now - for example:
https://njgin.state.nj.us/NJ_NJGINE...?docId={EC181B3D-4D15-11E1-A2E4-0003BA2C919E}
Whether the data from all counties is actually that current, I don't know. I used 2014 data for my earlier map, have you seen it?
https://forums.njpinebarrens.com/threads/parcels-in-the-pines.11747/ That map is in the MOBAC format that allows you to export for use on smartphones, dedicated GPS units, tablets and computers. In the next month or two I hope to release my big "Map of the Pines HD" in the same format.
Now the NJGIN data is not going to be very useful for the average person however. For starters, it's in shapefile format. But a bigger problem is that it only includes parcel ID data such as block, lot and PAMS PIN number. The ownership data is also provided, but is not linked to the shapefile. It's in the form on a Microsoft Access database. I imported into a relational database along with the .dbf attributes from the shapefile and "married" the two together, so I now have complete parcel data for the whole state on my computer. This was rather complex and resulted in some very large files.
[edit] was just looking at that 2016 NJGIN parcel link above. It says the new file has "joined MOD4 data" which implies that the state now offers a shapefile with owner and other data already combined. That would be very nice, will have to check it out. If you are good with computers and software, the free open source qGIS program can work with shapefiles, but there's a pretty steep learning curve.
http://www.qgis.org/en/site/