In message , at
14:59:03 on Tue, 6 Oct 2015, remarked:
http://www.railmaponline.com/UKIEMap.php shows the Vic passing west of
the reservoir.

http://www.itoworld.com/map/26?lon=-... ough_wrapper
shows the Vic running east-west under the reservoir.

The very different portrayals of the line from Seven Sisters -
Northumberland Park Depot are surprising.

Indeed. Only one of them can be right. Where do they get their data from?

There is a ventilation shaft coming in Finsbury Park roughly to the left of the words
"Finsbury Park" in the Rail Map image just above where it draws the Victoria Line.

I can't see that, could you zoom in on Google Maps and post a short
link?

That would be consistent with the ITO map but not, I think, the Carto Metro one,

As mentioned earlier, that map suffers a little from the artificial
separation of the under- and over-ground (notTM) stations at Finsbury
Park, so that the tube platforms are a little too far east. Apart from
that it agrees completely with the ITO map.

though looking closely it is hard to be sure. None of the three agree though.

Other than the one with Victoria going west of the lake in the park, all
the others (and more) are broadly in agreement about the routes from
Finsbury Park to Manor House.

Which is why I'm sceptical of any of them.

--
Roland Perry