Here is another trench map from my collection. This one is sheet number 28 NW edition 4 B. German trenches in red and correct up to 28/1/1917
I have enlarged a section and again matched it up to an image from Google earth. This is the area around Hill 60 in Belgium. The clump of trees next to the railway line - known as 'The Dump' is still there. The actual road layouts have barely changed.