Map nerds are doing incredible things. New technologies are still evolving.

Here are some map and map-making resources that I have explored.

NOT GOOGLE MAPS / SIRI

OpenStreetMap.org - has a lot. Created by people like you. Open license.

There is a good guide to using OSM at missingmaps.org

maps.stamen.com - easy and elegant map tiles.


PRIVATE COLLECTORS HAVE GREAT COLLECTIONS

Prelinger Library - in SoMa, San Francisco. Ask about the maps.
Some of the books are scanned and on archive.org

David Rumsey Map Collection - "Cartography Associates" with an incredible collection of freely downloadable high quality map scans.

Stanford Earthworks - has more maps


THE GOVERNMENT HAS CONTINUOUSLY ACQUIRED AND DISTRIBUTED PUBLIC INFORMATION  FOR YOU

USGS EROS Archive - Earth Resources Observation and Science (EROS) Center

USGS National Map (web app)

USGS Maps - hosted at Archive.org

USGS Global Ecosystems Data Download

NASA Visible Earth

USGS Earth Explorer

USGS Earthquake / faults / hazards

Library of Congress Maps Collections

Library of Congress Geography & Map Reading Room

National Archives Cartographic and Architectural Records

BAY AREA

(but any megopolis probably has a similar regional dataset)

Association of Bay Area Governments - Data, Maps, Apps

Association of Bay Area Governments - Open Data - Resiliency Program / Natural Hazards


RESOURCES FOR MAKING GIS / VECTOR MAPS

QGIS  (Q is for 'quantum') is an open source Geographical Information System. There is a growing community of map nerds working with this, and a good deal of documentation. There's definitely a learning curve, but it is a powerful tool if you can find your way around. I import public data maps --> select the content I need --> export a SVG file -->  style it in Adobe Illustrator (you could also use Affinity Designer, etc.).

TIGER/Line Files - Census Bureau

Topologically Integrated Geographic Encoding and Referencing — a digital database of geographic features, such as roads, railroads, rivers, lakes, legal boundaries, census statistical boundaries, etc.

United States only. Not as precise as some other map sets.

Natural Earth - vector and raster for basic earth features, no borders.

Natural Earth - 10m raster data