# Data fetched via HTTP from ['ftp://ftp.ngdc.noaa.gov/geomag/wmm/wmm2020/shapefiles/WMM2020-2025_BoZ_Shapefile.zip']

# Data processed using the following steps:

unzip -j -d {output_dir} {input_dir}/WMM2020-2025_BoZ_Shapefile.zip "*BOZ_arctic_all/BOZ_2021*"

ogr2ogr -lco ENCODING=UTF-8 -t_srs EPSG:3413 -clipdst {assets_dir}/latitude_shape_40_degrees.geojson {output_dir}/BOZ_2021.gpkg {input_dir}/BOZ_2021.shp