Here is an incredibly detailed map of the situation in Kyiv as of January 27. It comes from Dmitri Bortman and was published on Ilya Varlamov’s livejournal page, which has lots of on-the-ground details about what is happening on the Maidan (central square and environs) in Kyiv. If you want to read about what it’s actually like in Kyiv right now and see some amazing pictures, have a look at this recent post by Varlamov.
Basically the reddish shading shows the area occupied by the protesters, and the blue shading shows land occupied by government police forces. The red lines show barricades built by the protesters to keep riot police from clearing the demonstrations. The red dots give an idea of the density of clusters of protesters. Here’s the legend.