OpenLayers makes it easy to put a dynamic map
(location is an important HyperMultiMedia element)
in any web page.

New images will load as you navigate.
Move your view North, East, West, South: Click white triangle.
Change your view Altitude: Click + and - or use mousewheel.

Click and Drag anywhere on the map to move your view center.
Double-Click anywhere to zoom in one level on that center.
Hold down Shift, Click and Drag to select a particular region.

OpenLayers Wiki OpenLayers Tutorial OpenLayers Download
OpenLayers Gallery OpenLayers Email Lists
Also check for GeoSpatial links

It is not just HyperText, and it is more than HyperMedia.
WWW Technology gives us HyperMultiMedia.

WWWWorld Wide Web Technical and Promotional HyperMultiMedia ...
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Santa Rosa CA USA