GraphQL and geolocation on Postgres (PostGIS using Hasura)

This article provides a guide on building location-aware applications using Postgres and GraphQL. It demonstrates how to use Hasura's GraphQL engine for creating GraphQL APIs over Postgres, which is useful in developing backends for such applications. The author explains the process of setting up the Hasura cluster, enabling PostGIS extension on Postgres, creating tables with geographical data, inserting data using GraphQL, and fetching a list of landmarks near a user's location. Additionally, it mentions other utility functions provided by PostGIS that can be used for various purposes.