Marker list

You’ll need to do a bit of coding…

All markers are stored as WPGeo_Marker objects in an array.
You’ll need to loop through that array to put the marker information – a bit like this:

<?php
global $wpgeo;
foreach ( $wpgeo->markers->markers as $m ) {
   echo '<p>' . $m->name . '</p>';
}
?>

Sorry, I misunderstood.

I thought you wanted to list all the types of marker, like key.

You would first do a normal WordPress query to get and output your posts.

Within the loop you can get the current post marker like this:

$marker = get_post_meta( $post->ID, WPGEO_MARKER_META, true );

If there is no marker set you should use a default icon:

$marker = empty( $marker ) ? 'large' : $marker;

You can then get the WPGeo_Marker for that post:

$marker_obj = $wpgeo->markers->get_marker_by_id( $marker );

And in that you will find the marker image url and other variables:

echo $marker_obj->image

Does that give you some pointers?

The plugin doesn’t produce anything like that by default.

You would need to code it yourself using a WordPress query to create the list of titles, and Javascript to interface with the map.