The filet crochet background was made first. The lines were applied with surface crochet, then the background was filled in with white. The intersections are buttons.
This was not the best order of working as the filling-in pulled the grid and made the lines stand up in places. The grid should be filled before applying the lines although this makes it more difficult to see where the lines go.
Surface crochet lines applied to a square grid.
There is no pattern
for this afghan
Ben arrived, at Christmas 2008, with a ball of white yarn and a plan to knit a version of the London Underground map. It was to be a very complex cable design. When we downloaded a copy of the map, I had the urge to make a coloured version. I had been working with some other surface crochet ideas and this seemed an ideal application of the technique.
I used the map over a square grid and stretched it until I got the best fit on the grid. The relative positions of some lines and stations had to be adjusted slightly to make them fit the grid. There is a stitch for every station but there was not enough room to add the names.