So im really not sure if this is the correct place to ask this, however i cant think of another place where it would be more appropriate to ask, so correct me if this is the wrong place to post!
So i have a little game that i like to play with about 20 of my friends. I usually design a world with photoshop, and we use it as a sort of online boardgame, where we build settlements, kingdoms, armies e.c.t. Recently however, we have started to look into new land claiming systems. With our current system, each player pays a small amount of their money, to purchase a new tile of land. We have the map split into hexagons on an excell spreadsheet. Currently, if a player wants to buy some land, they would have to let either me or another close friend of mine to update the map by dragging a hegagon with their designated colour shaded in, onto the map to show that they now own it. As you can probably imagine, this is extremely tediouse and time consuming, especially with so many people.
To combat this, we have all been brainstorming new ideas for land claiming, and we settled on a particular idea that we all liked. That idea, involves using settlements as the main claimer. We would like it very much, if everyone would pick where they want their settlements, and i could mark that down somewhere, and some software or tool would draw a perfect organic border around all the settlements. It's kind of hard to explain via text, so i have drawn these diagrams to show what i mean. Below, i have an image of an island world. The blue dot represents a settlement. Currently, the blue settlement would claim the whole entire world, as their are no competeting settlements to get in its way. But now, another red settlement has cropped up on the map. This means that the blue settlement now has competition, and a border is drawn between the two settlements automatically. So, this is what im asking about. This is probably really overly specific, and i dont imagine i've explained this very well, but this is a sort of summary of the tool or software im looking for. A system in which i can plot down the settlements, and watch the organic borders be drawn between all the different kingdoms. I would again like to appologise for how specific this is, and i also appologise of my english as im still in the early days of learning to speak it. Thanks in advance to anyone who took the time to read this! (i am using Windows 10, just to clarify)