How To Measure The Area Of An Irregular Landscape

Determining the area of a property is a common
problem for landscapers. It’d be a no-brainer if everything was rectangular or square, but
you can see behind me that we have curves. We even have a flower bed that’s shaped like
an amoeba. To overcome this problem, I’m going to show you a technique to quickly and accurately
calculate the area of irregular shapes. There’s a few reasons why this is important. In the
irrigation side, we can use it to calculate the precipitation rate of the heads, and it
can also be used to figure out how many zones a property needs. In landscaping, we need
to know how much material to buy. Whether it is sod, hardscapes or fertilizer, we want
to have enough material to finish the job, but we don’t want to have a lot of material
left over that will go to waste. Either way, it’s going to save you time, and it’s going
to save you money. The best way to calculate the area of an irregular
shape is to treat it like a circle, but this is an oddly shaped area. What I need to do
is take at least 16 measurements from the center out in order to get an average radius.
To help me do that, I’ve created a template. This template is broken down into 16 equal
parts. I’ll set it in the center of the property, and I’ll use it to guide me around the perimeter.
What I’ve done is I’ve taken my template, and I’ve placed it in the middle of the property.
Now I just eyeballed what middle was. It doesn’t have to just be drop dead center. I have it
here. Now because I don’t have a friend to help me hold the end of the tape, I brought
a screwdriver that I will place right here. Then I’m going to take my 16 measurements
around the perimeter, and I’m going to measure it to the nearest half foot. If I get out
there, and it’s 14 feet, 4 inches, I’m going to call it 14.5 feet.
Continue recording measurements for the remaining reference points on your template. If you
come across an obstruction that prevents you from laying the tape across the guideline,
don’t worry about that. Just get as close as possible and then move on to the next one.
Now that you have your measurements, we’re going to take the 16 points that we have,
and we’re going to add them up. We’re going to divide by 16 to get the average radius.
In our example, the average radius is 25 feet. Now we’re going to put it into the formula
to calculate the area of a circle. That formula is Pi times the radius squared. For our example,
we’re going to take Pi, which is 3.14 times 25 times 25. That’s going to be the area of
our irregular shape. As you can see, it’s fairly simple to calculate
the area of an irregular shape, and it will save you time and money. Ewing Irrigation
offers more in-depth training through our live educational classes. If you’d like more
information, stop by your local branch or visit us online at


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