Binary package “postgis” in ubuntu bionic

Geographic objects support for PostgreSQL

 PostGIS adds support for geographic objects to the PostgreSQL
 object-relational database. In effect, PostGIS "spatially enables"
 the PostgreSQL server, allowing it to be used as a backend spatial
 database for geographic information systems (GIS), much like ESRI's
 SDE or Oracle's Spatial extension. PostGIS follows the OpenGIS
 "Simple Features Specification for SQL".
 .
 This package contains the PostGIS userland binaries for importing and
 exporting shape and raster files: pgsql2shp, raster2pgsql, and shp2pgsql.