[R-sig-Geo] land area of New Spain / Mexico 1790-present?

[Spencer Graves]

       Where might I find historical data on the land area claimed by 
New Spain / Mexico vs. the United States, say, 1790 - present?


       I found a table of land area of the US for each census 1790 - 
2000 at "http://www.u-s-history.com/pages/h986.html", and I found maps 
at 
"https://commons.wikimedia.org/wiki/File:Non-Native-American-Nations-Territorial-Claims-over-NAFTA-countries-1750-2008.gif" 
with narrative at 
"https://en.wikipedia.org/wiki/Territorial_evolution_of_North_America_since_1763" 
and 
"https://en.wikipedia.org/wiki/New_Spain#/media/File:Map_of_the_Viceroyalty_of_New_Spain.svg". 



       If I understand correctly, Mexico today is just under 2 million 
km^2.  With independence in 1821, it lost just over 500,000 km^2 in 
Central America.  Before that, as New Spain, it lost 2.1 million km^2 in 
the Napoleonic Wars eventually to the US in 1803. If this is correct, it 
was roughly 4.6 million km^2 prior to the Napoleonic Wars.  This does 
not count the loss of Florida and islands in the Pacific and the 
Caribbean, which I think are smaller than these other territories.


       Thanks,
       Spencer Graves