We have developed a draft MIAGIS as a minimum deposition standard for GIS datasets with the associated miagis Python package for implementing MIAGIS-compliant metadata in a JSONized format. We hope this provides a starting point for the establishment of a GIS standards group to further develop MIAGIS into a full standard for the GIS community. With this draft MIAGIS standard and a deposition SOP, we demonstrate the FAIRest deposition possible for publicly available maps generated within ArcGIS Online. But not all layers are FAIR. Some are generally Findable, but only interoperable and reusable within the ArcGIS ecosystem and not accessible. We label these layers as "Fir" within the GIS_METADATA.json file. This is an important distinction for data within restricted software ecosystems. While full FAIRness cannot be achieved in these situations, FAIRness can still be maximized.