Overlay URL Patterns

Overlay Type	Georectified?	URL Pattern
Image	No	http://[servername]/[path]/[imagefilename].[png\|jpg]
Tile Server	Yes	http://[servername]/[path]/{z}/{x}/{y}.png
Web Map Server (WMS)	Yes	http://[servername]/[path]?request=[getMap\|getCapabilities]
KML	Possible	http://[servername]/[path]/[filename].[kml\|kmz]

Text in [brackets] you must swap for real URL text, and text in {braces} is for Running Reality to swap for number values.

Map Sources

This is a collection of websites which provide map data. Care should be taken regarding copyright when doing research with an online map.

Wikipedia

The open online encyclopedia with a wide range of historical maps.

OpenStreetmap

Map tile server available for an atlas of the modern world.

NY Public Library

Georectified map tiles from the NY Public Library collection.

David Rumsey

Georectified maps from the David Rumsey collection.

EdMaps

Historical maps collection, mostly for Europe, and links to university map collections.

University of Texas

Massive historical maps collection.

Library of Congress

Historical maps collection, including the Sanborn fire insurance maps.

Cartoteca Digital of Catalunya

Maps of Spain, georectified using KML.