basemap does not "pip install" cleanly under Python 3.13. Might be related to some of the pinned upper versions of package dependencies? This environment had numpy 1.26.4 installed (so not a numpy 2.0 ...

It probably has to do with some of their pinned upper limits for basemap dependencies. It may not be numpy 2.0 compatible yet, but even with numpy 1.26.4 installed, it still fails to build. I've ...