A link to a webpage about spatial relations

The following link contains a vignette about someone who probably has topographic agnosia. Scroll down midway through the page for the part about Dorie Ryland.

http://www.newhorizons.org/spneeds/inclusion/teaching/stockdale.html

The story of Dorie Ryland in the above link illustrates how topographical agnosics navigate by landmarks rather than by routes, because topographical agnosia impairs the ability to visualize routes and their correspondences to real life surroundings.