Section 9 Terrestrial LiDAR
9.1 Classifing LiDAR point clouds
Technical resources
sf manual: https://cran.r-project.org/web/packages/sf/sf.pdf
lidR manual: https://r-lidar.github.io/lidRbook/
shapefiles manual: https://cran.r-project.org/web/packages/shapefiles/shapefiles.pdf
MNtopo https://files.dnr.state.mn.us/aboutdnr/gis/mntopo/mntopo_help_document.pdf
EPSG info: https://www.nceas.ucsb.edu/sites/default/files/2020-04/OverviewCoordinateReferenceSystems.pdf
SF: https://r-spatial.github.io/sf/articles/sf1.html#reading-and-writing