With the Archeology nodes imported and shown you can see the exact locations of the nodes. A few nodes are missing, but the majority that we do have give you an idea of the area by seeing lots of nodes.
The only problem I have with it is that the Blizzard digsite icon is under the node icons and the digsite icon disappears as you zoom in, so I made these changes for next version:
Made digsite icons draw above artifact icons.
Made digsite icons not hide while zoomed into map when "Show Artifact Locations" is on.
Showing artifacts:
Right click (C) minimap icon. Select "Options". Select "Guide".
Left click "Import Carbonite Nodes Misc (artifacts, gas) locations" and click "Import".
Press ESC. Right click a non icon area of map, select "Show" and check "Show Artifact Locations".