If I ever need to confirm which is which, I use the the mnemonic above. I usually imagine latitude corresponding to rings on the earth moving up and down along the surface. This image is triggered by thinking about "altitude" in the context of latitude for me.
The latitude defines which of these "rings" the point is on.
Try thinking of it like latitude being like a ladder's rungs. Though this does have the horrifying side effect that sometimes you'll pronounce it laddertude in your head.
Altitude
Vertical
If I ever need to confirm which is which, I use the the mnemonic above. I usually imagine latitude corresponding to rings on the earth moving up and down along the surface. This image is triggered by thinking about "altitude" in the context of latitude for me.
The latitude defines which of these "rings" the point is on.
https://cdn.britannica.com/07/64907-050-7ACA69C8/Facts-paral...