create_bm | R Documentation |
Use open street map data to create a basemap with the extent of the data
create_bm(
DT,
lat = "lat",
lon = "lon",
buffer = 1000,
sc_dist,
squared = FALSE,
projection = paste0("+proj=laea +lat_0=90 +lon_0=-156.653428 +x_0=0 +y_0=0",
" +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0 ")
)
DT |
Name of the data.table |
lat |
Name of the column with latitude (as.character) |
lon |
Name of the column with longitude (as.character) |
buffer |
Buffer around the data |
sc_dist |
Distance of the scale |
squared |
If true buffer is created around the centre and outline squared |
projection |
Projection of the data (default is equal area with centre Barrow) |
bm, a ggplot2 base map
# create table with two points
DT = data.table(name = c('NARL', 'Utqiagvik'),
lat = c(71.320854, 71.290246),
lon = c(-156.648210, -156.788622))
# change projection
st_transform_DT(DT)
# create base map
bm = create_bm(DT)
bm
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