In this tutorial, we will learn how to create a CLI Dataloader and a spatial REST API using Hibernate and CockroachDB. We will also build a dynamic Trajectories map on top of the REST service. The full source code for this blog post is available on GitHub. First, we will create a CLI Dataloader application to load the GPS trajectory dataset from the Geolife project into CockroachDB. Then, we will create a REST API Trajectory service on top of this database with full CRUD functionality. Finally, we will add a minimal web mapping application on top of that REST service so we can dynamically view the Trajectory data on a map. The tutorial covers creating a CLI Dataloader, using Hibernate and Spring Boot to create a spatial REST API with CRUD functionality, and building a dynamic Trajectories map on top of the REST service. It also discusses limitations and strategies for dealing with large datasets in spatial applications.