ogr2ogr
Convert Simple Features data between file formats.
TLDR
Convert a Shapefile into a GeoPackage
$ ogr2ogr -f GPKG [path/to/output].gpkg [path/to/input].shp
Reduce a GeoJSON to features matching a condition
$ ogr2ogr -where '[myProperty > 42]' -f [GeoJSON] [path/to/output.geojson] [path/to/input.geojson]
Change coordinate reference system of a GeoPackage from EPSG:4326 to EPSG:3857
$ ogr2ogr -s_srs [EPSG:4326] -t_srs [EPSG:3857] -f GPKG [path/to/output].gpkg [path/to/input].gpkg
Convert a CSV file into a GeoPackage, specifying the names of the coordinate columns and assigning a coordinate reference system
$ ogr2ogr -f GPKG [path/to/output].gpkg [path/to/input].csv -oo X_POSSIBLE_NAMES=[longitude] -oo Y_POSSIBLE_NAMES=[latitude] -a_srs [EPSG:4326]
Load a GeoPackage into a PostGIS database
$ ogr2ogr -f PostgreSQL PG:dbname="[database_name]" [path/to/input].gpkg
Clip layers of a GeoPackage file to the given bounding box
$ ogr2ogr -spat [min_x] [min_y] [max_x] [max_y] -f GPKG [path/to/output].gpkg [path/to/input].gpkg
