How to read a legal land description

Worked example: 4-12-52-24-W4

Take 4-12-52-24-W4 and walk it from the right — from the biggest unit of land to the smallest:

Put together, that lands you in southeast Edmonton: the centre of section 12-52-24-W4 works out to 53.476038, -113.405612. The LSD narrows that square mile down to a single 40-acre corner of it.

The four levels of detail

The same section can be described at four granularities. The prefix tells you which one you are reading: letters mean a quarter or half, a number from 1–16 means an LSD, and no prefix at all means the whole section.

Quarters are named for their corner of the section (NE, NW, SE, SW); halves for their side (NH, SH, EH, WH — so WH-6-52-23-W4 is the west half of section 6). LSDs use the numbers 1–16 in a serpentine pattern explained in how LSD numbering works. Count the parts to avoid the one common ambiguity: 12-52-24-W4 (four parts) is a section, while 4-12-52-24-W4 (five parts) is an LSD.

Legal land description examples

One real example of each format, and how to read it:

How the system works

The Dominion Land Survey divides the prairies into townships roughly six miles by six miles. Each township holds 36 one-square-mile sections, numbered back and forth (boustrophedon) starting with section 1 at the southeast corner and ending with section 36 at the northeast. Each section then splits into 4 quarters of 160 acres or 16 legal subdivisions of 40 acres.

Townships are numbered northward from township 1 at the 49th parallel; ranges are numbered from each survey meridian — the 4th meridian at 110°W in this example. For the full picture, including correction lines and why range widths shrink as you go north, see township, range and meridian explained.

One caveat for British Columbia: outside the Peace River Block, BC does not use DLS at all. Oil and gas locations there use NTS/BCGS descriptions like d-96-H/94-A-15 instead — see DLS vs NTS and how to find a BC NTS or BCGS location.

Coverage and limitations

• Full DLS coverage for Alberta, Saskatchewan and Manitoba, plus BC's Peace River Block.
• Positions are computed from about 21,000 townships of surveyed corner coordinates published by the provincial governments, warped over pure DLS math — typically within tens of metres of the monuments on the ground.
• Coordinates are for navigation and reference only. They are not legal land-survey records and cannot substitute for a survey by a licensed land surveyor. See the methodology for details.

Frequently asked questions

What is a legal land description?

A legal land description pinpoints a parcel on Western Canada's Dominion Land Survey (DLS) grid. Read right to left, it names a meridian, a range (a six-mile column counted from that meridian), a township (a six-mile row counted north from the 49th parallel) and a section (one square mile, 640 acres), with an optional prefix narrowing it to a quarter (160 acres), a half (320 acres) or a 40-acre legal subdivision (LSD). For example, 4-12-52-24-W4 is LSD 4 of section 12, township 52, range 24, west of the 4th meridian. The grid itself is explained in township, range and meridian explained and how LSD numbering works.

How do I find the legal land description of a property?

If you already have the description — from a land title, lease, well licence or rural address — paste it into the free DLS/LSD lookup to see the parcel outline on a map with GPS coordinates. If you only know where the property is, enter its latitude and longitude (or browse the interactive map) and the reverse lookup returns the section, quarter or LSD containing that point, computed from surveyed township corners published by the provinces — see converting GPS coordinates to a legal land description.