My Maps Schema Reference

Exported Object: Map
Exported Object represents: The map as a KML/KMZ file.
Object is exported in these formats: KMZ
Exported object has the following fields:
Data Field *	Field Definition	Data Field Type
* The preceding fields represent key data fields for the purposes of parsing and ingesting the relevant data exports. Data fields produced in an export vary by service and user action and some services or actions don't produce each data field described.
doc.kml	KML file that contains map data.	file
images	Directory that contains images for custom icons.	directory

A table representing Resource Groups and the objects that are exported with it.
Resource Group	OAuth Scope Name	Description	Exported Objects
mymaps.maps	https://www.googleapis.com/auth/dataportability.mymaps.maps	This resource group contains the maps the user created in My Maps, including layers, features, and media.	Map