User Guide for Tree Structures

[aaronzedwick]

Closes #804

Overview

Adds a user guide for the tree structures, BallTree and KDTree.

PR Checklist

General

• An issue is linked created and linked
• Add appropriate labels
• Filled out Overview and Expected Usage (if applicable) sections

Examples

• Any new notebook examples added to docs/examples/ folder
• Clear the output of all cells before committing
• New notebook files added to docs/examples.rst toctree
• New notebook files added to new entry in docs/gallery.yml with appropriate thumbnail photo in docs/_static/thumbnails/

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[philipc2]

May you add the tree_structures.ipynb notebook to userguide.rst

uxarray/docs/userguide.rst

Lines 11 to 18 in ad9af81

	.. toctree::
	:maxdepth: 1
	user-guide/terminology.rst
	user-guide/representation.rst
	user-guide/grid-formats.rst
	user-guide/data-structures.ipynb
	user-guide/area_calc.ipynb

[rajeeja]

@philipc2 how about icons for users guide notebooks?

[aaronzedwick]

@philipc2 how about icons for users guide notebooks?

I asked him about that, he said he doesn't think we need them for the user guides.

[philipc2]

Notebook looks perfect!