Short answer: Parcel lines in a hunting app come from county assessor records aggregated by commercial data providers. They are good enough to plan around and not good enough to argue with — and knowing the difference keeps you out of real trouble.
Where the data comes from
County assessors maintain parcel records for taxation. Companies such as Regrid and ReportAll aggregate those thousands of county datasets into something usable at national scale, normalise the formats, and license the result to apps like this one.
That chain has consequences. A county that surveyed carefully and digitises promptly produces good data. A rural county working from hand-drawn plats digitised in 1998 produces something rather less good. The app cannot be more accurate than the county it came from.
How wrong it can be
- Tens of feet is routine. Normal digitisation error, and enough to matter on a narrow strip.
- Occasionally hundreds of feet in rural areas with old records.
- Stale ownership. Sales take months to a year to appear. The name shown may be the previous owner.
- Missing splits. A parcel divided last year may still show as one.
- Easements and leases are invisible. The map shows ownership, not who holds hunting rights.
What this means practically
Never let a boundary line be the only thing between you and a trespass. If you are within fifty yards of a line you have not physically verified, treat the situation as uncertain — because it is, and the consequences of being wrong range from an awkward conversation to a citation.
Verify what matters: walk the line, look for surveyor markers, check for old fence, and where a corner genuinely matters, pull the plat from the county. That is an afternoon once, and it settles the question permanently.
The legitimate uses
Finding out who owns the eighty behind your lease so you can ask. Understanding the ownership patchwork around a public tract. Knowing roughly where you are relative to a line so you can stay comfortably clear of it. All genuinely valuable, none of them requiring survey-grade precision.
Common questions
How accurate are hunting app property lines?
Typically within tens of feet, occasionally much worse in rural counties with old records. Plan with them; never rely on them alone at a boundary.
Can I find out who owns land next to mine?
Usually. Parcel data includes owner names from county records, though sales can take months to appear. County records are the authoritative source.
Is it trespassing if the app's line was wrong?
Generally yes — relying on an app is not a legal defence. Verify boundaries physically anywhere you hunt close to a line.