Creating a polygon for a fixed area

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10-24-2021 08:43 PM
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James_OKane
New Contributor III

Hi All,

I have a deceptively simple problem. I need to create a polygon with a fixed area and can't figure out any way to do this other than trial and error. Please see the example below. I'm tasked with creating a poly of 15,000 m². The NW line is fixed, NE and SW lines are fixed to the NW line and able to grow and shrink the SE line. 

fixedAreaExample.png

Because the NE and SW lines have different bearings its not a simple math problem. Below is a trial and error. One too small (11,358) and one too big (17,332) so obviously the magic 15,000 is inbetween. 

fixedAreaExample1.jpg

My question is whats the best way to solve this problem? It seems to me that it could be done with software like Pro but a good search hasn't found anything. Any suggestions?

Thanks in advance.

Cheers,
James

 

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Accepted Solutions
Scott_Harris
Esri Regular Contributor

Create a larger polygon than what you need

Edit tab > Modify > Divide

  • Method: Equal Area
  • Choose the NW edge of the polygon to set the direction of the dividing line.
  • Area:15,000 sqM.
  • Number of parts: 1

Scott_Harris_0-1635168667434.png

Measure the result:

Scott_Harris_1-1635168718714.png

Does that help?

-Scott

 

 

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3 Replies
JayantaPoddar
MVP Esteemed Contributor

If you can calculate the dimensions (I used 100x150 ft), you could Specify a direction and distance—ArcGIS Pro | Documentation.

JayantaPoddar_1-1635142771582.png

 

 

JayantaPoddar_0-1635142672033.png

JayantaPoddar_2-1635143158484.png

 



Think Location
Scott_Harris
Esri Regular Contributor

Create a larger polygon than what you need

Edit tab > Modify > Divide

  • Method: Equal Area
  • Choose the NW edge of the polygon to set the direction of the dividing line.
  • Area:15,000 sqM.
  • Number of parts: 1

Scott_Harris_0-1635168667434.png

Measure the result:

Scott_Harris_1-1635168718714.png

Does that help?

-Scott

 

 

James_OKane
New Contributor III

Hi Scott, 

Perfect solution! Its very rare I have to do set area polys so I guess I forgot that the divide tool has that feature. 

Thanks!
James