I'm trying to customize Google static maps so that maps display entirely in greyscale. It's mostly working, however there are some map "features" that I can't seem to select and style. In particular, there are (what appear to be) highway ramp labels with a green background and white text that I'd like to make black and white, or hide altogether. Here's an example:
I've searched for a comprehensive list of static maps features, but I only seem to find general instructions. Does a full list of features exist anywhere?