How to convert GPS coordinates to a legal land description
Enter a latitude and longitude in decimal degrees — for example 53.476038, −113.405612 — into the free lookup below and it returns the legal land description containing that point: 12-52-24-W4in this case. It works anywhere in the Dominion Land Survey grid across Alberta, Saskatchewan, Manitoba and BC’s Peace River Block.
Worked example: 53.476038, −113.405612
The reverse lookup runs the survey grid backwards, from the point inward:
Reverse lookup
Meridian
−113.4° is between 110°W (W4) and 114°W (W5) → west of the Fourth Meridian
Township
53.48°N is about 306 miles north of the 49th parallel → township 52
Range
About 141 miles west of 110°W at this latitude → range 24
Section
The point falls in the square mile second from the south on the east edge → section 12
Result
12-52-24-W4
That is a square mile in southeast Edmonton. The tool does this against surveyed township corners rather than ideal grid math, so the description it returns matches the parcel lines on the ground.
Decimal degrees format
Latitude first, then longitude: 53.476038, -113.405612.
In Western Canada latitude is positive (north) and longitude is negative (west). If your source gives 113.405612° W, enter it as -113.405612.
Five to six decimal places locates a point within about a metre — more precision than the lookup needs.
Choosing the granularity
Any point sits inside several nested parcels, so pick the level that fits the job:
Section (1 square mile) — 12-52-24-W4: rough area, dispatch notes, “which square mile am I in?”
Quarter (160 acres) — e.g. NE-12-52-24-W4: the standard unit for farmland, grazing leases and rural addresses.
LSD (40 acres) — e.g. 4-12-52-24-W4: the precision oil and gas uses for wellsites and facilities.
Try the lookup
Paste coordinates from any GPS, mapping app or photo metadata — for example 53.476038, -113.405612.
or build it field by field
How the reverse lookup works
The Dominion Land Survey divides the prairies into ~6-mile-square townships, numbered north from the 49th parallel and west (ranges) from each survey meridian. Each township holds 36 one-square-mile sections; each section splits into four quarters or sixteen 40-acre LSDs. A reverse lookup finds which surveyed township polygon contains your point, then which section, then which quarter or LSD — using more than 21,000 townships of surveyed corner coordinates from provincial records, not just idealized grid arithmetic. Real townships are warped by correction lines, meridian convergence and century-old fieldwork, which is why the survey fabric matters.
Reverse lookup covers the DLS grid in Alberta, Saskatchewan, Manitoba and BC’s Peace River Block. Points outside the surveyed grid — cities on river-lot surveys, the far north, most of BC — have no DLS description to return; BC locations outside the Peace River Block use NTS/BCGS instead. Near a boundary line, GPS error of a few metres can flip the answer to the neighbouring quarter, so treat results as navigation and reference grade — not a legal survey.
Standing in a field with no signal?
The most common reverse lookup is “what quarter am I on right now?” Land Description Lookup for iPhone answers it with one tap from your current location — entirely on-device, with offline base maps of all four provinces, so it works kilometres from the nearest tower.
Positions are computed from surveyed township corners published by the governments of Alberta (ATS/AltaLIS), Saskatchewan (ISC SaskGrid), Manitoba and the BC Energy Regulator. Read the full methodology.
