7.5 Creation

An sf object can be created from scratch by

p1 <- st_point(c(7.35, 52.42))
p2 <- st_point(c(7.22, 52.18))
p3 <- st_point(c(7.44, 52.19))
sfc <- st_sfc(list(p1, p2, p3), crs = 'OGC:CRS84')
st_sf(elev = c(33.2, 52.1, 81.2), 
      marker = c("Id01", "Id02", "Id03"), geom = sfc)

## Simple feature collection with 3 features and 2 fields
## Geometry type: POINT
## Dimension:     XY
## Bounding box:  xmin: 7.22 ymin: 52.18 xmax: 7.44 ymax: 52.42
## Geodetic CRS:  WGS 84
##   elev marker               geom
## 1 33.2   Id01 POINT (7.35 52.42)
## 2 52.1   Id02 POINT (7.22 52.18)
## 3 81.2   Id03 POINT (7.44 52.19)

Convenience functions

• st_sample
• st_make_grid
• st_interpoloate_aw