It's obvious that the signs used to represent parts of the bridge in words are very different from the signs used in the picture of the bridge. Notice also that the same item (Bridge, Arch, Banks, etc.) is often mentioned more than once in the text version. This is necessary due to the constraints of text as a representational system. However, in a graphic of this bridge, such information needs to appear only once. The arrangement of these items is also different in the text from what it would be in a graphic. To appreciate this, compare the order of mention in the text with this depiction. You can see that the text is not arranged in a way that would directly map onto the bridge. Rather, it presents the bridge's components in a linear sequence that gives no visual indication of the bridge's structure.