A boundary survey and a fence line are not always the same thing. On many older properties, the fence went up decades before anyone ordered a current survey. Reading the drawing correctly takes more than glancing at where the fence sits on the ground.
Start With the Survey’s Orientation, Not the Fence
Before looking at any line on the survey, find the north arrow. It’s usually a small symbol tucked in a corner of the sheet. This arrow tells you which way the drawing is turned compared to the real world.
The top of the page does not always point north. Surveyors lay out the parcel so it fits neatly on the paper. That often means north points sideways, or even toward the bottom of the sheet.
Next, check the scale. It sits near the north arrow, shown as a ratio or a small bar marked with distances. The scale tells you how the paper size relates to actual ground distances. A short line on paper might represent hundreds of feet on your land.
Once you know which way is north and how the scale works, you can picture how the drawing lines up with your property. Walk the land with the survey in hand. Stand at a corner marker, if one exists, and turn the paper until the north arrow matches true north on a compass or phone. The lines on the page should now roughly match the directions around you.
This step comes first for a reason. Trying to read boundary lines before understanding orientation leads to misreading where they actually run.
Follow the Boundary Calls Around the Parcel
A boundary survey describes the edge of a parcel using a series of calls. Each call has two parts: a bearing and a distance.
The bearing is a direction, written something like N 42° 15′ 00″ E. It tells you which way the line runs, measured from north or south toward east or west. The distance is a length, usually in feet, showing how far the line runs before it turns at the next corner.
Read each call along the property line, moving from one corner to the next, the way you’d trace your finger around the outside edge of the parcel on paper. Don’t stop at the first call and judge the whole boundary from it. One measurement only describes one segment. The full boundary is the sum of every call, connected corner to corner, back to where it started.
Some surveys use terms like “point of beginning,” which marks where the written description starts and ends, or “monument found,” which means a marker was located during the fieldwork, such as an iron pin or a stone. You only need a handful of these terms to follow the calls. If a term is unclear, check the survey’s notes first.
Following the whole sequence matters because a fence might sit close to the boundary in one spot and drift several feet away in another. Judging the line from a single point gives a false picture.
Find Out What the Fence Line Actually Represents
A fence is a physical object. A boundary is a described line, defined by bearings and distances tied to monuments found or set during the survey. These two things can sit close together. They are not automatically the same.
Many surveys show existing fences on the drawing. Look for a separate line style, often dashed, sometimes labeled “existing fence” near it. If the fence appears next to the boundary but slightly offset, the drawing is telling you something. That offset, whether six inches or six feet, is recorded to show how the fence related to the surveyed line at the time of the fieldwork.
Don’t guess this relationship by eye. A fence that looks like it sits right on the line from a distance can actually run a few feet inside or outside it. The only way to know is to check the measurements on the drawing, or ask the surveyor directly.
If the survey doesn’t show the fence at all, that doesn’t mean the fence and boundary line up. It may simply mean the fence wasn’t there, or wasn’t picked up, at the time of the survey.
Read the Small Details Around the Main Drawing
The boundary lines get most of the attention, but the notes and legend carry information needed to interpret them correctly.
Check the legend first. It explains what each line style, symbol, and abbreviation on the drawing means. A solid line might mark the boundary. A dashed line might mark a fence, an easement, or a setback. Without checking the legend, these can be hard to tell apart.
Read the notes next. Surveyors often add notes for things that don’t fit neatly into a line or symbol: a reference to a prior deed, a flag for an area not field-verified, or a statement about which monuments were found versus set. These notes can change how a line near your fence should be read.
Look at labels near corners and along lines too. A short abbreviation like “IPF” (iron pipe found) or “CMF” (concrete monument found) tells you what kind of physical marker exists at that point, if any.
Treat the survey as one complete document. The line closest to your fence is only part of the picture. A note in the corner of the sheet, or a symbol in the legend, can change what that line actually means.
When the Drawing and the Ground Do Not Seem to Match
Sometimes a fence sits somewhere different from where the survey seems to place the boundary. This turns up often on older properties, where fences were built long before any formal survey existed.
If this happens on your property, don’t move the fence based only on your own reading of the drawing. A boundary survey involves technical judgment: how measurements were taken, which monuments were relied on, how prior deeds were interpreted. That judgment isn’t always visible in the lines on paper.
Instead, call the licensed surveyor who prepared the drawing. Bring specific questions: which line represents the boundary near the fence, what markers were found or set nearby, and how the measurements were determined. A surveyor can walk through the drawing with you and point out the actual monuments on the ground, if any exist.
This applies whether the difference is a few inches or several feet. Small differences can matter as much as large ones, depending on where a structure sits relative to the line.
Reading a boundary survey gives you a clear picture of what the surveyor found and recorded. It is not a stand-in for a licensed surveyor’s judgment when something looks unclear or inconsistent. If you have questions about a specific line, drawing, or fence, ask the surveyor who prepared it.
Frequently Asked Questions
Can I use a boundary survey to tell where my fence should be?
A boundary survey can show the surveyed property boundary and the location of visible improvements such as a fence. However, the survey should be read as a complete document rather than using the fence alone as the reference point.
Why does my fence not appear to follow the line on my boundary survey?
A fence and a surveyed boundary are not necessarily the same line. The survey may show the fence separately from the boundary so the relationship between the two can be understood. If the drawing is unclear, ask the surveyor who prepared it to explain the specific measurements and markings.
What do the numbers along the lines on a boundary survey mean?
They commonly identify measurements associated with the surveyed lines, such as distances and directions. The exact presentation varies by survey, so the drawing’s notes and labeling should be read together with those numbers.
Does the top of a boundary survey always point north?
No. A survey drawing should be read using its north arrow or other directional reference rather than assuming the top edge of the page represents north.
What should I look at first when reading a boundary survey?
Start with the title or identifying information, north arrow, scale, legend, notes, and the overall parcel depiction. Then follow the boundary calls around the parcel rather than focusing on one line or physical feature.
