Some building seem to have their internal walls mapped. For example:<p><a href="http:&#x2F;&#x2F;maps.nls.uk&#x2F;geo&#x2F;explore&#x2F;#zoom=20&amp;lat=51.5226&amp;lon=-0.1061&amp;layers=163" rel="nofollow">http:&#x2F;&#x2F;maps.nls.uk&#x2F;geo&#x2F;explore&#x2F;#zoom=20&amp;lat=51.5226&amp;lon=-0.1...</a><p>Or am I reading this wrongly?