How to overlap various polygons in a single diagram? Also how to find the global centroid for all of the plotted polygons?

I already have the answer to find the centroid of a single polygon, just need to know it's extension.

Answer 1

[Steven Lord]

If you have a vector of polyshape objects, you can plot the vector to see all the polyshape objects in the same axes. Take the union of the vector of polyshape objects and compute the centroid of that unified polyshape.

[Sudev Parthiban]

I do not have the vectors

[Steven Lord]

What information do you have?

Vectors of coordinates of the vertices of the polygons? If so use those to construct polyshape objects and compute the centroid of the union of those objects.

Images / pictures of the polygons?

Something else?