Mapping GIS notes

• geocoding: https://jessecambon.github.io/tidygeocoder/index.html

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• https://cran.r-project.org/web/packages/rnaturalearth/README.html

• https://cran.r-project.org/web/packages/rnaturalearth/vignettes/rnaturalearth.html

• https://www.naturalearthdata.com/

• WGS84 - EPSG = 4326 ; proj4string

• st_simplify -- requires 2 parameters, tolerance, preserve topology

• rmapshaper - good defualts

• just the shape:

  • st_geometry

• read_sf and write_sf are aliases for st_read and st_write, respectively, with some modified default arguments. read_sf and write_sf are quiet by default: they do not print information about the data source. read_sf returns an sf-tibble rather than an sf-data.frame. write_sf delete layers by default: it overwrites existing files without asking or warning.