Chapter 11 study guide: Legal descriptions
A legal description identifies a parcel of land more precisely than an ordinary street address. An address helps someone find the front door. A legal description identifies the land involved in a deed, mortgage or other document. Chapter 11 introduces the methods used to describe it and the arithmetic needed to understand fractional sections.
The first question is not how many acres are involved. It is which description system the problem uses. Once you recognize the system, its details become much easier to organize.
Three description methods
| Method | Typical clues | How to approach it |
|---|---|---|
| Metes and bounds | A point of beginning, directions, distances and boundary references. | Follow the boundary calls around the parcel. |
| Government survey | Sections, township, range and fractional parts. | Locate the grid reference, then identify the stated portion. |
| Lot and block | Lot, block, subdivision and recorded plat references. | Use the identified recorded plat, not a street number alone. |
Different documents may refer to the same land in related ways, but a licensee should not casually rewrite a legal description. An apparently small omission can change what the document describes. An abbreviated tax-record display is useful for research, not automatically a complete conveyancing description.
Metes and bounds: follow a boundary
A metes-and-bounds description works through a sequence of boundary calls. It may use bearings, distances and monuments or other references. The point of beginning starts the parcel boundary; the description should close back to that point. A preliminary reference leading to the point of beginning is not necessarily part of the boundary itself.
For a simple classroom sketch, imagine beginning at a marked corner, going north 100 feet, east 200 feet, south 100 feet and west 200 feet. That produces a rectangle of 20,000 square feet. Real descriptions may involve curves, irregular boundaries and conflicting evidence, so this exercise is not a method for resolving an actual boundary dispute.
Bearings use direction as well as an angle. North 30 degrees east does not mean the same line as south 30 degrees east. Sketch the north-south reference first, then mark the turn. It is much easier to notice a direction error on paper than in a long row of numbers.
Township, range and section: find the grid
The government survey system uses a principal meridian and base line as reference lines. Townships are identified north or south of the base line and ranges east or west of the meridian. A standard survey township is nominally six miles square and divided into 36 sections; a standard section is nominally one square mile, or 640 acres. BLM's land-description specifications explain the system and its exceptions.
The word nominally matters. Actual surveyed areas can differ because of corrections, irregular boundaries and government lots. Use 640 acres when a study problem specifies a standard section; do not override a real plat's recorded acreage with a memorized classroom figure.
How to calculate fractional sections
For an ordinary acreage exercise, multiply the area by each stated fraction. The northeast quarter of the southwest quarter of a standard section contains 640 x 1/4 x 1/4 = 40 acres. The directional words locate that land; the fractions determine its area.
When locating it on a sketch, work from the larger reference toward the smaller one. First locate the southwest quarter of the section. Then locate the northeast quarter within that quarter. This avoids mistakenly selecting the southwest part of the northeast quarter, which has the same area but a different location.
The word and usually means separate parcels or portions must be calculated before adding. For two nonoverlapping pieces consisting of a quarter section and a half of a quarter section, the total is 160 + 80 = 240 acres. Check that the pieces do not overlap; adding the same ground twice does not create more land.
Lot numbers, addresses and parcel IDs
A lot number is not a house number. Lot 12 on a recorded subdivision plat may have a completely different street address. A parcel identification number is an administrative reference used in property assessment systems. It helps locate information, but it should not replace the required complete description.
Similarly, an online tax map is not the same as a boundary survey. A survey can investigate boundaries, improvements and apparent encroachments within the assignment. An agent who sees a fence near a mapped boundary should raise the question, not announce that the fence proves ownership.
Check your understanding
Question: How many acres are in the north half of the southeast quarter of a standard 640-acre section?
Answer: 80 acres. Calculate 640 x 1/4 x 1/2. To locate it, find the southeast quarter first and then its northern half.
Try the Chapter 11 practice questions. Sketch the land and write the units beside every result.
Study the next step
Try Chapter 1, register to save progress and continue as you pass the chapter quizzes. The certificate fee is explained separately from free study access. Find related topics in the study guides.
Based on Chapter 11 lessons reviewed October 8, 2026. Educational examples are not surveys or legal descriptions for use in a transaction.