What it is
Boundaria is the map an agent builds before the showing. Open the listing on current aerial imagery, trace the boundary from the county’s own parcel record — or by hand, where the record is wrong — and add what matters: the well, the gate, the fence line, the creek, the building site, a scanned plat pinned to its corners.
Then send one link. It opens on a phone with no account, and what the client sees is the ground — not a brochure, and not a diagram.
How a listing goes out
Click the parcel and the county’s polygon becomes a shape you can keep. Draw the line yourself where the fabric does not match what is being sold. The drawn acreage and the deeded acreage print side by side.
Forty-nine kinds of item, each drawn in the style it is: fences as fences, creeks as creeks. Photos, notes, a tour link, and a scanned plat stretched onto the ground until its corners sit where they belong.
Publishing takes a snapshot. Tidy the boundary tomorrow and the client’s link does not change until you publish again, so a half-drawn shape never reaches a live listing. Unpublish, and the link is gone.
No login, no app. The outline, the items, the acreage, the description you wrote for them, 3D if you turned it on — and the same acreage warning you saw, if there is one.
The same map drops into the listing page as an iframe, on public imagery.
Named features
All four run in the browser, on the map the boundary was drawn on.
Historic imagery
Twenty years of the same ground, by year.
Every public aerial vintage a state publishes, in place — Montana 2005–2025, Wyoming from 1994, Idaho from 2004, Washington 1989–2017, North Dakota back to flights from 1957 where they exist. A year with no imagery at your spot is greyed and says so, never skipped to a neighbour. A banner names the vintage and its age for as long as it is on screen.
Flight video
A flight along any line you draw.
Set a start and end altitude, preview the flight on the map, and render a 1080p video in the browser. Only what you drew flies: the parcel fabric and owner labels stay off. Every frame carries the Boundaria watermark.
Time-lapse
The property, filmed through the years.
A slow drift over the property while the vintages cross-fade and a year label counts up. It closes on today’s imagery, labelled Today rather than a year because the capture date varies by area, and the end card names every source.
Offline
Field maps that work in a dead zone.
Frame the ground, pack the imagery, and the map opens with no signal. Edits made offline stay on the phone and sync when it returns. If the phone clears a packed area to free space, the list says so rather than letting it vanish.
When it does not know
Every map tool has gaps in its data. Boundaria names a gap where it is, rather than leaving a blank that reads as an answer. These are the app’s own words.
When the drawn shape and the deeded acreage disagree by more than two percent, both numbers print with a red triangle and the word conflict — for the agent and for the client. Boundaria does not choose between two numbers it cannot verify.
A blank value reads as “worth nothing”. Where a state does not publish a field, the panel says which state keeps it quiet.
Old imagery stays labelled for as long as it is on screen, and a published map always opens on current imagery.
Zone D is reported as its own line. Folding it into “no flood zone” would turn an unknown into a no.
Road access is measured against public road data. “No road found” never says landlocked, and “touches a road” never says legal access.
A well the state located only to its section is drawn where the record puts it, and the record’s own precision is written beside it.
Coverage
Parcel lines come from each state’s own cadastral service, queried live at property zoom. What a state publishes alongside them differs, and the panel says which.
| State | Owner | Mailing address | Assessed value | Historic imagery |
|---|---|---|---|---|
| Montana | Yes | Yes | Yes | 2005–2025 |
| Wyoming | Yes | Yes | Yes | 1994–2024 |
| North Dakota | Yes | Yes | Yes | 2003–2024plus 1957–62 and 1995–98 where flown |
| Idaho | County services only | Not published | County services only | 2004–2023 |
| Washington | Not published | Not published | Yes | 1989–2017 |
Idaho’s statewide layer carries no value, acreage or mailing address, and Washington’s omits the owner’s name. Where a county publishes its own service, a click there uses the county’s record and names it.
Montana does not disclose sale prices; the pricing figures Boundaria shows are asking prices, and say so.
It is not a survey. Boundaries here are drawn by an agent, over aerial photography, from public parcel data. County parcel fabric is generalised and the photography carries its own positional error — enough, on a small lot, to move a line by the width of a driveway. Nothing on one of these maps establishes a legal boundary.
For that you need a licensed surveyor, and the recorded plat and legal description control. Treat a Boundaria map as a good illustration of where the ground is, and never as the instrument that says where it ends.
Frequently asked