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A growing list of available online maps from across the world, with detailed descriptions of each site. This link is the third in a series, but links to both earlier lists and descriptions.
Provides access to more than 300 data sets from the USGS, available for search, browse, and download. Data includes satellite images, aerial photographs, and LANDSAT imagery.
Citing maps and atlases
Cartographic Citations: a Style Guide, 2nd ed.
Shelved in: Map and Government Information Library - Reference GA108.7 .C55 2010
Style guides for citing maps, atlases and related resources in all formats.