Calculate Polygon Boundary using Fixed Boundary Constraints and a Target Area

Question

Hi,

I was wondering if there’s a way in ArcGIS Pro to accomplish the following:

I have specific boundaries, say 3 boundaries, that are fixed, and I want a polygon of x area in acres, say 40 for simplicity.  I want to have the program calculate the fourth boundary such that my polygon will satisfy the fixed boundary constraints and total EXACTLY 40 acres.

Years ago I did this in a CAD program. Is this kind of calculation doable in GIS, and if so, how?

DianneGray2 · Answer

Ok, so the Split Polys tool in your toolkit would be sufficient to accomplish this task then?

danretired · Answer

create cutters as polyline featureclass.  Orient them as you see fit  E-W or N-S,  just make sure each polyline crosses the polygon boundary... it doesn't need to be exact

I created some polygon/polyline tools you might want to try

Polygon Polyline Tools for Pro - Esri Community

The download link is there in the link.  I haven't played with it much lately, so if you have any issues let me know

PS... Only use projected data,.  When you split up the polygon, you could do a cumulative sum to get the main bits, then repeat with a fine-tuned slicing around the potential division line.  Depends on how accurate you need your divisions.  If 8 of 10 slices meet your requirements, then you could union those polygon bits to get one continuous area.

Have fun

PS   Transect lines can be used to create the cutters to use in split polygons

DianneGray2 · Answer

Ok, so from here, how do you apply the code to an existing polygon feature class to actually split a polygon (or just create a line feature class that represents where the cutter stops)?  Also, where would you define the orientation of the cutter polyline (N-S, maybe E-W)?  I will need some help with that.