We badly need a sort of wiki that lets us gradually correlate the 1901 census data to the 1909 map.
We have to expect lots of missteps, and make sure it's easy to re-align sections.
This means first of all matching streetnames (which often vary), then matching map-properties to street numbers.
When we get a Thom's we can start putting in businesses too.
To make it practical (and free) we could do a block at a time starting with Eccles. [demo]
The censuses include a handy but untranscribed 'House and Building Return (Form B1)' [eg] that includes an exact count of how many windows each building has in front.