okay I can definitely make Compass generate the image and send that in the Micropub request! I think I will make some settings so that you can customize what is included in the Micropub request, as well as choose the dimensions of the image to generate. Maybe if I'm feeling ambitious I can make it so you can choose which map style to use! https://github.com/aaronpk/Static-Maps-API-PHP/#parameters
no hurry, i managed to generate images myself. thanks to your p3k core source code on github, where i learned a thing or two: wirres.net/article/archive/62/. thanks for all the great tools!