DOC/website: Reorganize subsection "Overview"

doc/overview.md

@@ -1,6 +1,18 @@
 # Overview
 
-## About
+## Why PyGMT
+
+A beautiful map is worth a thousand words. To experience the power of PyGMT, try it
+online with [Binder or Google Colab](https://github.com/GenericMappingTools/try-gmt)
+without installing anything on your computer.
+
+For a quick introduction, check out our [3-minute overview](https://youtu.be/4iPnITXrxVU).
+Afterward, try the [Intro to PyGMT](intro/index.rst) tutorial on your own, explore the
+[Gallery](gallery/index.rst) for inspiration, follow the [Tutorials](tutorials/index.rst)
+to learn more, explore available map [Projections](projections/index.rst), and finally
+check out some [external PyGMT examples](external_resources).
+
+## Background
 
 PyGMT is a Python wrapper for the
 [Generic Mapping Tools (GMT)](https://github.com/GenericMappingTools/gmt),
@@ -18,12 +30,49 @@ and JPG for use on the web and elsewhere. In fact, PyGMT users will usually not
 contact with the original PostScript files and get only the more convenient formats like
 PDF and PNG.
 
-The project was started in 2017 by [Leonardo Uieda](https://www.leouieda.com) and
-[Paul Wessel](https://en.wikipedia.org/wiki/Pål_Wessel) (the co-creator and main
-developer of GMT) at the University of Hawaiʻi at Mānoa. The development of PyGMT
-has been supported by NSF grants [OCE-1558403](https://www.nsf.gov/awardsearch/show-award/?AWD_ID=1558403)
-and [EAR-1948602](https://www.nsf.gov/awardsearch/show-award/?AWD_ID=1948602).
+For more information about the design and development of PyGMT, see the
+[PyGMT paper](https://doi.org/10.1029/2026GC013105) published in
+*Geochemistry, Geophysics, Geosystems*.
+
+## Project goals
+
+From the beginning, the project has aimed to achieve the following goals:
+
+- Make GMT more accessible to new users.
+- Build a Pythonic API for GMT.
+- Interface with the GMT C API directly using ctypes (no system calls).
+- Support rich display in the Jupyter notebook.
+- Integrate with the [scientific Python ecosystem](https://scientific-python.org/):
+  `numpy.ndarray` or `pandas.DataFrame` for data tables, `xarray.DataArray` for grids,
+  and `geopandas.GeoDataFrame` for geographical data.
+
+## Community
+
+The PyGMT project was started in 2017 by [Leonardo Uieda](https://www.leouieda.com) and
+[Paul Wessel](https://en.wikipedia.org/wiki/Pål_Wessel) (the co-creator and main developer
+of GMT) at the University of Hawaiʻi at Mānoa. Currently, the project is community-driven
+and maintained by an [international team](team.md), with contributions from
+[multiple contributors](https://github.com/GenericMappingTools/pygmt/graphs/contributors).
 
-We welcome any feedback and ideas! Let us know by submitting
+We welcome any feedback, ideas, and contributions! Let us know by submitting
 [issues on GitHub](https://github.com/GenericMappingTools/pygmt/issues) or by posting on
 our [Discourse forum](https://forum.generic-mapping-tools.org/c/questions/pygmt-q-a).
+
+## Related projects
+
+Other official GMT wrappers include:
+
+- [GMT.jl](https://github.com/GenericMappingTools/GMT.jl): A Julia wrapper for GMT.
+- [gmtmex](https://github.com/GenericMappingTools/gmtmex): A Matlab/Octave wrapper for GMT.
+
+## Funding
+
+The development of PyGMT has been supported by NSF grants
+[OCE-1558403](https://www.nsf.gov/awardsearch/show-award/?AWD_ID=1558403) and
+[EAR-1948602](https://www.nsf.gov/awardsearch/show-award/?AWD_ID=1948602).
+
+## License
+
+PyGMT is free software: you can redistribute it and/or modify it under the terms of the
+BSD 3-clause License. A copy of this license is provided in
+[LICENSE.txt](https://github.com/GenericMappingTools/pygmt/blob/main/LICENSE.txt).