Calculating distance between two node references in Views (D6)

To modify the contents of a views table before it is rendered do this:

Create a custom module with a function called template_preprocess_views_view_table__yourviewname. Where yourviewname is... erm... your view name. Note the double underscore there.

This takes a single argument &$vars

$vars['rows'] holds the data collected by the view. Your function can use location information you should tell the view to fetch (but not display) to perform any calculations. You should probably place a dummy column (using NID or something) in the view and then have the calculated value put in that column.

When your function has done modifying the $vars variable call the standard hander to complete the job:

@raintonr - this sounds really interesting. Would it be possible to see where you have used it showing us the map, please? I'm interested in everything that has to do with maps in Drupal. :-)