The Shaded Relief Archive is a very interesting resource for digital versions of manual shaded relief for mapmakers. The site makes shaded relief data available for free as GeoTIFF files and in non-georeferenced formats as well. Users can find data for areas around the world, though the data is best utilized at smaller scales.
The Shaded Relief Archive also serves as a means of preserving the work of manual shaded relief. From the site: "ur dual goals are giving cartographers a stylish option to generic digital shaded relief—manual relief often provides a clearer picture of major terrain features, especially at small scales, as shown in this comparison. And scanning the best hand-drawn relief before it is permanently lost. We are in a race against time. Mapping organizations having now shifted to digital production are discarding photomechanical materials, including manual shaded relief. Much of this beautiful art deserves to be used by future mapmakers."
h/t to Free Geography Tools and the WeoGeo blog for this info.
Original post blogged on b2evolution.