code/01-introduction.R

In dgl5gw/geocompr: Geocomputation with R: a book

## ----sf-ogc, fig.cap="The Simple Features class hierarchy, used with permission (on condition of linking to the source) from the Open Geospatial Consortium's document 06-103r4 (see http://www.opengeospatial.org/standards/sfa)", out.width="100%", echo=FALSE----
knitr::include_graphics("figures/simple-feature-class-hierarchy.png")

## ---- eval=FALSE---------------------------------------------------------
#> vignette("sf1") # for an introduction to the package
#> vignette("sf2") # for reading, writing and converting Simple Features
#> vignette("sf3") # for manipulating simple features

## ---- results='hide'-----------------------------------------------------
library(sf)
# devtools::install_github("nowosad/spData")
f = system.file("shapes/wrld.shp", package = "spData")
world = st_read(f)

## ------------------------------------------------------------------------
class(world)

## ---- results='hide'-----------------------------------------------------
summary(world)

## ------------------------------------------------------------------------
world_sp = as(object = world, Class = "Spatial")