For any recitified map in the Map Warper at http://warp.worldmap.harvartd.edu, once you are signed in, go to the export tab for the map you want to bring into WorldMap. Right click on “Tiles base URL” and “copy link location”. Then you will just paste that into the right place in WorldMap. Here's how: Once you have copied the Tile Base URL as described above, go to WorldMap http://worldmap.harvard.edu and open the Map you want to add the Warper layer to. Read more about How do I bring a map layer from the Warper into WorldMap?