Add equity map

[mstone121]

Overview

This PR adds a basic version of the the equity map.

The equity data shapefile is large, >300mb, and can't be served to the frontend in one piece. In order to reduce the size of the data, I performed the following steps:

• Filtered out shapes that were not disadvantaged (SN_C == 0)
• Dissolved the remaining (SN_C == 1) shapes into one shape
• Simplified the shape by retaining 1% of the data points (Douglas-Peucker method)

Then I used dirty-reproject to project the map with albersUsa. (For some reason this created bounding-box shaped rings around each element. The best way I could figure out to delete these was to do a find and replace in the JSON file, though this was time consuming and error-prone.)

The map in it's current state is not done and doesn't match the design exactly, but the amount of data displayed (and the limitation of it being just one giant feature) also differentiates it from the design. I figured we could start here and re-evaluate display of this data. A few things to consider are:

• Does the diagnol lines pattern still work? I made the lines thinner and closer together so smaller details of the shape wouldn't get lost.
• How exactly do we want to display this data with the spending data? Perhaps we could make the disadvantaged communities a toggle-able layer.

Closes #67

Demo

Testing Instructions

• http://localhost:8765/
• Switch to "Disadvantaged communities map"
  • Ensure data renders correctly

Checklist

• fixup! commits have been squashed
• CHANGELOG.md updated with summary of features or fixes, following Keep a Changelog guidelines
• README.md updated if necessary to reflect the changes
• CI passes after rebase

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	1		0	0.02s
✅ BASH	shfmt	11		0	0.01s
✅ JAVASCRIPT	prettier	42		0	5.37s
✅ JSON	eslint-plugin-jsonc	3		0	0.78s
✅ JSON	jsonlint	3		0	0.14s
✅ SPELL	misspell	87		0	0.1s
✅ TERRAFORM	terraform-fmt	5		0	0.15s
✅ YAML	yamllint	5		0	0.33s

See detailed report in MegaLinter reports

MegaLinter is graciously provided by

[rachelekm]

Great job wrangling all this data, for how much is there I think it looks really good and renders quickly. I also didn't know about dirty-reproject which is pretty cool. I left two comments, but they're minor and this successfully gets a basic equity map up so we can move forward discussing how best to display this data. FWIW I think the diagonal lines work but breaks down by the midwest/southeast—but I could also see this data being compelling as a toggle-able layer over the per-capita map and maybe that diagonal pattern will be most visible over colored states this way? Interested to see where this goes!

[rachelekm]

Suggested change

	var svg = map
	const svg = map

[rachelekm]

I think this useEffect is getting called every time we toggle between the per capita map and then back to the equity map. After the initial toggle to the equity map I would think we wouldn't need to re-render, would useMemo be more appropriate here? Also not sure how relevant this is if we're eventually refactoring this as a toggle-able layer.

[mstone121]

Closed since we're proceeding with a different equity map. See #100 for replacement.