Использование library(geojsonsf)
, кажется, работает без проблем на моем Mac с 16 ГБ ОЗУ
library(geojsonsf)
library(sf)
sf <- geojsonsf::geojson_sf("~/Downloads/Ohio.geojson")
sf
# Simple feature collection with 5449419 features and 0 fields
# geometry type: POLYGON
# dimension: XY
# bbox: xmin: -84.82027 ymin: 38.40334 xmax: -80.51887 ymax: 41.97041
# epsg (SRID): 4326
# proj4string: +proj=longlat +datum=WGS84 +no_defs
# First 10 features:
# geometry
# 1 POLYGON ((-84.81222 39.9087...
# 2 POLYGON ((-84.80084 39.8882...
# 3 POLYGON ((-84.78565 39.8811...
# 4 POLYGON ((-84.7373 39.9014,...
# 5 POLYGON ((-84.73916 39.8980...
# 6 POLYGON ((-84.80422 39.8646...
# 7 POLYGON ((-84.80025 39.8592...
# 8 POLYGON ((-84.79336 39.8593...
# 9 POLYGON ((-84.79268 39.8604...
# 10 POLYGON ((-84.80194 39.8639...