geom_bbox

R Documentation

Create bounding box of bulk uploads (BU) geometries and save it as GeoJSON file

Description

Geometries bounding box (bbox). Read one or various XLSX worksheets within folder. Collect the xmin, xmax, ymin, xmax of each XLSX coordinates and creates minimum bounding box (MBR), that is, extent of geometries. This bounding box is exported as a GeoJSON file and can be copy/paste in the Map filter of EAMENA database to recover selected grid cells(list_mapping_bu.R). Can also be used to get precise Stamen basemap extent (ggmap), etc.

Usage

geom_bbox(
  dataDir = NA,
  x_column = NA,
  y_column = NA,
  wkt_column = NA,
  dirOut = paste0(system.file(package = "eamenaR"), "/results/"),
  geojson.name = "mbr.geojson",
  verbose = TRUE
)

Arguments

dataDir	path to folder where XLSXs are.
x_column, y_column	column of X and Y coordinates, if these arguments are set to 'NA', the function will read the field 'wkt'.
wkt_column	column of WKT coordinates, if NA (default) function will read the field 'x_column' and 'y_column'.
dirOut	folder where GeoJSON will be saved. Default: '/results'. If it doesn't exist, will be created.
geojson.name	name of the GeoJSON that will be created, Default 'mbr' (minimum bound rectangle)
verbose	if TRUE (default) then display different messages.

Value

bounding box of the dataset as a GeoJSON file

Examples

geom_bbox(dataDir = "C:/Rprojects/eamena-arches-dev/data/bulk/bu/mk2/",
          x_column = "Longitude.",
          y_column = "Latitude",
          geojson.name = "grids_bbox_mk2.geojson")

geom_bbox(dataDir = "C:/Users/Thomas Huet/Desktop/temp_xlsx/",
         dirOut = NA,
         wkt_column = "Geometric Place Expression")