I am trying out @tylermorganwall Rayshader R library. Some instructions are given here by tylermw8 to get elevation data from the USGS National Map.
I am interested in obtaining data around the Golden Gate Bridge. The data I download from from USGS National Map (n38w123) is, I believe, a one degree square tile which is 60 miles N/S and about 53 miles W/E. That's too much data for playing around with his rayshader library.
The bounding square of interest is:
(37.88, -122.56) (37.88, -122.41)
(37.77, -122.56) (37.77, -122.41)
How do I 'cut' this elevation data out of the large download from USGS? Is this where the library(sf) comes in handy?