The treaty of hildago Guadalupe increased the size of?

In the 1950s I did some plant work for the US Department Of The Interior working off photo copies of the original maps of the Treaty of Hildago. The land that was purchased from Mexico was from the Pacific Ocean to just short of was is now Route 905, and from what is now the border to just short of the Imperial Beach Airport. On a regular google map you can see the straightness of the top line of the green park area. Extend that line to almost the 905 and go down and follow the border and then back up to the top of the green area along the Pacific Ocean. As I spread seeds and buried some seeds for a few bigger plants I could see some evidence of the buildings of the Mexicans prior to the Treaty of Hildago. In the photocopy of the treaty(photocopy in bigger book that contained the maps I was working with) that I read all the residents of that area were to be removed to the new Mexican side of the border at the expense of Mexico. While I am here the Treaty of Hildago states that Mexico is to cede its claims to all those territories- not the territories themselves. Many now eliminate the part about the claims so that their readers will think that Mexico had possession of those territories.