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I have a major polygon showing in the following image and its area is 264387.097089999995660 hectare (area can be in any unit, mostly in hectare),

this is major polygon with known area

I want to divide this polygon into any numbers of sub polygon (like 20 sub-polygon, 329 sub-polygon, more or less in number). e.g., showing following image, I divide it into 20 sub-polygon but the area of all 20 sub-polygon is equal. enter image description here

I have area of all 20 sub-polygon e.g., ( 2900312, 7100312, 4900312, 8500456, and so on)hectare.

I want to divide this major polygon into any number of irregular sub polygon according to the given area not in equal. How can I divide it?

I am trying to do it in QGIS using polygon divider plugin, also in ArcGIS. Also trying in PostGIS using K-mean Cluster function but didn't get desired result.

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4
  • 1
    There are literally an infinite number of ways to do this.
    – Vince
    Commented Jan 19, 2022 at 12:32
  • 1
    Random points in polygon, than voronoi polygons. For othet solutions, please add more information
    – Babel
    Commented Jan 19, 2022 at 14:58
  • @Vince please provide me any specific solution for my problem.
    – Pragati Srivastava
    Commented Jan 24, 2022 at 5:43
  • 1
    GIS SE is a problem-solving site. You haven't presented one problem, but an infinite number of them. You need to chose how you intend to resolve the task, make an attempt, encounter a problem, and provide details of the problem before the Question is sufficiently focused for GIS SE.
    – Vince
    Commented Jan 24, 2022 at 12:24

1 Answer 1

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ST_Subdivide it:

Divides geometry into parts using rectilinear lines, until each part can be represented using no more than max_vertices

select st_subdivide(geometry, 200) as geom
from "your_table"

enter image description here

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4
  • can we give area for creation of sub-polygon as input?
    – Pragati Srivastava
    Commented Feb 4, 2022 at 11:02
  • To this tool, no
    – Bera
    Commented Feb 4, 2022 at 11:05
  • please tell me any other tool or solution where I get somehow solution of my problem, if you can.
    – Pragati Srivastava
    Commented Feb 4, 2022 at 11:07
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    I dont know, this problem is very difficult. This is an example of solving a similar one using R: gis.stackexchange.com/questions/417679/…
    – Bera
    Commented Feb 4, 2022 at 11:22

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