In addition to our API documentation, we provide a detailed User Guide. Please see that guide for setup instructions, tutorials, and explanations of GeoTrellis/GIS concepts.
If you can't find exactly what you're looking for in either our Guide or API docs, feel free to join us in our Gitter channel, where we can (as live as possible) answer your questions.
Contributing to GeoTrellis
GeoTrellis is an open source project, so contributions of any kind are welcome and appreciated! Contributors will need to sign a CLA (Contributor's License Agreement). These details and others relating to GeoTrellis contributions can be found here.