When a eagle ( or a crow ) soars aloft, it looks down on a world that is spread out beneath it, two dimensional and flat. Tidy up the image, add some labels, shrink it by, say, 10000 times, and you have a map. A computer could display it on a screen and it would be useful.
Map making works for two dimensional things, and it works best if they are flat. The surface of the globe is two dimensional, but it is not flat, and we all know the trouble that causes for map makers
The only thing we know about the topology of the web is that the graph of links is not a planar graph. So it is not 2-D and flat. What is the dimensionality of the web? The only definition of dimensionality I have come up with that is applicable to cyberspace is rather technical, and I haven't tried measuring it yet. But it must be quite high, and completely break the map metaphor.
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