First of all, I know that some of the topics have already been covered in other topics, but I think that since I'm going to talk about several topics, I'll just mention them in one topic.
First of all, I congratulate you on this project as it creates yet another set of objectives to achieve. I know that the project is in its early stages, so new resources will appear, including those that I will mention below, but it doesn't hurt to suggest them.
I will suggest and number the topics that could improve the area extremes system:
1- As it already exists with the extremes found where clicking on the icon and the cache appears, there could be in those that we have not found, thus making the search easier (it could be the same as those we found or even a special search, as this way it could be easier to find even the areas that we do not have in any of the extremes found).
2- As it happens to some geocachers, even I am currently the owner of some cache in Extremos and for that reason the icon is like I need to find it, but as it is not possible to find the caches themselves, I think they could refer to this with an icon in another color, for example.
3- As there is already the highest altitude extreme, why the lowest altitude extreme?
4- There could be a filter that allows us to include caches that are archived or not, for example the filters that exist in the D\T graph of type\size
Best regards Nelitoz