To explore the PostgreSQL/PostGIS database, and learn about writing spatial queries in SQL, we will need some software, either installed locally or available remotely on the cloud.
There are instructions below on how to access PostgreSQL for installation on Windows or MacOS. PostgreSQL for Windows and MacOS either include PostGIS or have an easy way to add it on.
There are instructions below on how to install PgAdmin. PgAdmin is a graphical database explorer and SQL editor which provides a “user facing” interface to the database engine that does all the world.
For always up-to-date directions on installing PostgreSQL, go to the PostgreSQL download page and select the operating system you are using.
3.1. PostgreSQL for Microsoft Windows¶
For a Windows install:
Go to the Windows PostgreSQL download page.
Select the latest version of PostgreSQL and save the installer to disk.
Run the installer and accept the defaults.
Find and run the “StackBuilder” program that was installed with the database.
Select the “Spatial Extensions” section and choose latest “PostGIS ..Bundle” option.
Accept the defaults and install.
3.2. PostgreSQL for Apple MacOS¶
For a MacOS install:
Go to the Postgres.app site, and download the latest release.
Open the disk image, and drag the Postgres icon into the Applications folder.
In the Applications folder, double-click the Postgres icon to start the server.
Click the Initialize button to create a new blank database instance.
In the Applications folder, go to the Utilities folder and open Terminal.
Add the command-line utilities to your PATH for convenience.
sudo mkdir -p /etc/paths.d echo /Applications/Postgres.app/Contents/Versions/latest/bin | sudo tee /etc/paths.d/postgresapp