Maine GeoLibrary publishes 1,666 open datasets for United States. Browse them live in Vizzie and turn any one into a map or chart.
Maine GeoLibrary is the open-data portal for United States, covering Maine. It runs on ArcGIS Hub, Esri's open-data platform for geographic data. You can browse it directly at mainegeolibrary-maine.hub.arcgis.com.
On Maine GeoLibrary, a majority of datasets here declare no licence at all. It's important to know that "no licence declared" is not the same as public-domain or free-to-use. Undeclared data carries no explicit permission to copy, adapt, or redistribute it — so reusers should treat it cautiously and check with the publisher before relying on it. Vizzie flags each dataset's licence (or its absence) so you can see this before you build.
Statewide catalogue. Most datasets say 'Access: Public. Use: User accepts risk.' — an access statement, not a licence grant, so they resolve UNDECLARED (measured 2026-09-19). Worth revisiting if Maine publishes blanket…
No download, no GIS specialist. Opens in Vizzie.