从数据帧转换为SF

Question

我有下面的数据，我想从data_frame转换为R中的sf对象。

head(RwandanDataset[,8:13])

# A tibble: 6 x 6
  authority begin_datetime end_datetime longitude latitude elevation
  <chr>     <chr>          <chr>        <chr>     <chr>    <chr>    
1 WESTERN   01/01/2013     31/12/9999   29.42     -1.63    2392     
2 EASTERN   01/01/2013     31/12/9999   30.24     -1.55    1503     
3 EASTERN   01/01/2013     31/12/9999   30.51     -1.90    1575     
4 EASTERN   01/01/2013     31/12/9999   30.71     -2.01    1311     
5 EASTERN   01/01/2013     31/12/9999   30.67     -2.28    1576     
6 NORTHEN   01/01/2013     31/12/9999   30.06     -1.82    1865     

class(RwandanDataset)
[1] "tbl_df"     "tbl"        "data.frame"