Google Map Polygon Integration with WP Toolset Types Maps plugin

Hi there,
I use the Toolset suite of plugins for WordPress: https://wp-types.com/

I'm using custom post types, fields, etc. Also the Toolset Maps plugin:
https://wp-types.com/documentation/user-guides/#toolset-maps

That allows me to add a map location to each of my custom posts.

You can see this working here: http://dev3.pontcymru.org/conservation-grazing/grazing-case-studies/

For each post a pin is plotted.

I want to know if you can provide customisations to the mapping system, such that instead of plotting a pin, an administrator could plot a polygon, from within the WP Dashboard post edit page, instead of a pin.

This development would be as a WP plugin.

I'm not sure if this is actually possible, but would like to know if you can do it.

Alternatively, we could consider use a way of drawing the polygon on Google maps and being able to associate it with individual posts.