Hi there,
Thank you for getting in touch, we do appreciate your time.
Although we do support importing/using the image geodata for marker locations, we do not make use of a post type.
This means you will need to create the marker by clicking on Maps -> Editing your map -> And using the ‘Add marker’ section to add a new marker to the map.
While creating your marker you can click on the image icon next to the ‘Address’ field to extract the location from the image.
It is not currently possible to extract the geodata location directly from posts featured image. However, this is something we will look into for future development.
I hope this helps.